Issuu on Google+

September 2013

High Pressure Treated Timber SPECIFIER’S GUIDE

TANALITH family Proven long term protection against decay and insect attack for building , fencing, landscaping, garden and engineering timbers.


TANALITH E pressure treated timber • Protected by a unique, highly developed preservative formulation, tanalItH e pressure treated timber gives a reliable and consistent protection against fungal decay and insect attack. • appealing natural pale green colour with excellent weathering properties. • Usually specified for indoor and outdoor applications where there is a medium to high risk of fungal decay and insect attack, eg. general construction, landscaping and leisure timbers, fencing and other outdoor timber projects. • available with a built-in water repellent (tanalItH extra) or colour additive (tanatone) or a combination of water repellent and colour additive (tanalItH Creol). tanalItH Creol treatment is applied throughout a two-part process; a high pressure tanalItH e treatment followed by a dipping or low pressure treatment with Creol colourant.

FOr WATEr rEPELLENT TImBEr SPECIFY ‘WITH TANALITH ExTrA WATEr rEPELLENT ADDITIvE’ Built-in water repellent provides enhanced weathering protection and improved dimensional stability. Ideal for cladding and decorative garden timbers.

FOr BrOWN COLOUrED TImBEr SPECIFY ‘WITH TANATONE COLOUr ADDITIvE’ appealing built-in brown colour. Ideal for rough sawn fencing and landscaping applications.

FOr DArK BrOWN COLOUrED AND WATEr rEPELLENT TImBEr SPECIFY ‘WITH TANALITH CrEOL ADDITIvE’ Ideal for cladding, garden and leisure wood structures, sleepers and fencing.

TO SPECIFY, the following wording is recommended . . . (UK only) • The timber as detailed . . . (insert quantity, dimensions, species, whether sawn or round and its end use/description of component) . . . is to be vacuum/pressure treated with TANALITH E preservative (state with TANALITH Extra water repellent, TANATONE colour additive or TANALITH Creol additive, if desired) to comply with the Treatment Code . . . (insert “TE” Code from the chart opposite). • Following treatment, any areas of treated timber revealed by cross cuts, holes, notches, shall be brushed with ENSELE end-grain preservative. • Timber which is rip sawn, equalised, planed or heavily sanded must be returned to the treatment plant for re-treatment. • On no account are fence posts to be pointed after treatment. The shortening of posts and columns should be avoided. In any event, cross cutting must be restricted to the top of the post or column. • Specification clauses are available to download from the Lonza website - www.lonzawood.com


Proven performance against fungal decay and insect attack.

The best choice for general construction, landscaping and leisure timbers, fencing and other outdoor timber projects.

Specification chart for TANALITH E pressure treated timber ComPoNENT groUP Internal building timbers

External building timbers above dpc level

Plywood

Fencing and landscaping timbers above ground contact Fencing, landscaping and farm buildings in ground contact or fresh water contact

Highway fencing above ground Heavy duty industrial

USE CLASS

UK TrEATmENT CodE

dESIrEd SErvICE LIFE

1

Roof timbers (dry): pitched roofs, rafters, purlins, joists, sarking, wall plates.

TE/BI

60 years

1 or 2

Roof timbers (Hylotrupes areas): Where there is a risk of House Longhorn Beetle (Hylotrupes bajulus L) according to the Building Regulations [5] (applicable to England and Wales), the Building Standards Scotland [6] and the Building Regulations (Northern Ireland) [7]: pitched roofs, rafters, purlins, joists, sarking, wall plates.

TE/BI

60 years

2

Roof timbers (risk of wetting): Where components are exposed to risk of wetting due to, for example, condensation: rafters, purlins, joists, sarking, wall plates, flat roofs (cold), enclosed beams, valley gutter timbers, flat roofs (warm inverted), exposed beams.

TE/BI

60 years

2

Tiling battens

TE/TB

60 years

2

External walls/ground floor joists. Timber frame material, external walls.

TE/BI

60 years

2

Sole plates.

TE/BX

60 years

3U∞

Cladding*, uncoated.

TE/gFb

30 years

3C∞

Cladding, soffits, fascias, barge boards subsequently protected with a maintained and appropriate surface coating.

TE/BX

30 years

3U∞

Cedar shingles.

TE/CS

30 years

BS EN 636 Exterior Grade (EN 314 Part 2 bonding class 3) or WBP (weather and boil proof). Humid Grade (bonding class 2) may also be suitable.

TE/EPa

60 years

3U•∞

BS EN 636 Exterior Grade (EN 314 Part 2 bonding class 3) or WBP (weather and boil proof).

TE/EPb

15 years

3U∞

Rails, struts, gates, boards, slats, droppers, post caps, dowels, garden decking boards, farm building, pergolas, gazebos and playground equipment components above ground contact.

TE/gFa*§

15 years

4

Posts (square sawn or cleft, sawn and dressed, machine turned, natural rounds, half rounds), bearers, gravel boards, sleepers in ground contact.

TE/gFb*§

4

Farm buildings: timbers embedded in ground or prone to frequent wetting. Lock gates, revetments.

2•

3U∞ 4 4 4

Packaging timbers in cargoes to Australia

ComPoNENT dETAILS

This list is not exhaustive. If your timber component is not listed, please contact Lonza for further advice.

3U†∞

To meet Highways Agency Specification Clause 311 or where a longer service life is required than general Use Class 3 timbers. Highway fencing in ground contact: To meet Highways Agency Specification Clause 311. Packing timbers used in fresh water cooling towers. Transmission poles. Or where a longer service life is required than general Use Class 4 timbers. To comply with Australian Quarantine Regulations.

(for 30 years - TE/MF)

15 years

(softwood only)

(for 30 years - TE/HD)

TE/HW

15 years

(hardwood only)

TE/mF

30 years

TE/Hd

30 years

TE/AQ

Not applicable

(softwood only)

Permeable softwood only#

Useful documents The TANALITH E Treated Timber User Guide provides full details on the properties and handling of TANALITH E, TANALITH Extra and TANATONE pressure treated timber.

Cutting of TANALITH E, TANAToNE, TANALITH Extra and TANALITH Creol treated timbers Any treated timber surface exposed by cross-cutting, drilling, notching or boring must be brushed with ENSELE end-grain preservative to maintain the integrity of the treatment. A choice of ENSELE product is available for use with either green or brown pressure treated timber. The ENSELE Technical Data Sheet provides full information on this product.

SPECIFICATIoNS ANd STANdArdS TANALITH E preservative is tested in accordance with the requirements of EN 599, including extended field trial testing. TANALITH E pressure treated timber is treated in accordance with the penetration and retention requirements given in BS 8417. Care should be taken when specifying timber species to ensure that these can be treated in accordance with these penetration and retention requirements. Use Classes are defined in EN 335. TANALITH E pressure treated timber meets NBS (Z12), NHBC and WPA National Specifications. Lonza advises specifiers/users to ask for a confirmation of treatment from the supplier as part of the specification/purchase process. dESIrEd SErvICE LIFE The desired service life does not provide a guarantee of performance but an indication of the expectation against which the recommendations for timber treatment are drawn up, assuming good design and normal conditions of use. All specifications refer to treatment of both softwoods and hardwoods, unless otherwise indicated. * Specify ‘with TANALITH Extra’ for water repellent timber, if desired. § Specify ‘with TANATONE’ for brown coloured timber, if desired. ∞ In accordance with EN 335: 2013 Use Class 3 can also be sub-classified as 3.1 and 3.2 respectively. † Classification in accordance with Australian Standards AS1604. # Includes most common pines eg. Scots Pine (Redwood) and Corsican Pine but not including Maritime Pine. • Always check suitability for treatment with the plywood supplier.


High Pressure Treated Timber

High pressure preservative treatment process tanalItH e pressure treated timber is impregnated with tanalItH e preservative under controlled conditions by vacuum high pressure technology in an enclosed system.

1

2

timber loaded into treatment vessel. Initial vacuum is applied and the timber cells are evacuated of air. Vacuum held.

Cylinder flooded under vacuum with tanalItH e wood preservative, with colour or water repellent additives if required.

3

4

5

Hydraulic pressure is available, enabling the preservative to penetrate into the timber structure, to achieve a target penetration for the specified Use Class.

a final vacuum extracts excess preservative solution, which is then pumped back into storage.

low pressure inside the timber draws in the surface solution when vented to atmosphere. treated timber is left to dry.

Please note: tanalItH Creol treatment is applied through a two-part process; a high pressure tanalItH e treatment followed by a dipping or low pressure treatment with Creol.

Availability of treated timber/specific treatments Ready treated stocks or specific treatments of tanalItH e, tanalItH extra, tanatone and tanalItH Creol pressure treated timber are available through a network of timber companies and treaters throughout europe. For details on your nearest supplier, please contact lonza at the address below or visit www.tanalisedtimber.co.uk

TANALITH family

Š Copyright 2013 lonza Wood Protection. ™ tanalith, tanatone and ensele are registered trademarks of arch timber Protection, a lonza company. lonza Wood Protection is a business of arch timber Protection, a lonza company. Disclaimer: Whilst every attempt has been made to ensure the accuracy and reliability of the information contained in this document, lonza Wood Protection gives no undertaking to that effect and no responsibility can be accepted for reliance on this information. lonza Wood Protection updates its literature as and when necessary. Please ensure you have an up to date copy.

Wheldon Road, Castleford, West Yorkshire, WF10 2Jt. tel: +44 (0)1977 714000 Fax: +44 (0)1977 714001 e-Mail: timberprotectionadvice.ukca@lonza.com

www.lonzawood.com


September 2013

Low Pressure Treated Timber SPECIFIER’S GUIDE

VACSOL family Proven long term protection against decay and insect attack for general internal building timbers, timber frame material, roof and floor components and external joinery.


VACSOL Aqua treated timber • VACSOL Aqua treated timber is protected with VACSOL Aqua waterbased preservative, containing biodegradable fungicides.

• Proven performance against fungal decay and insect attack.

• The appearance of the timber is virtually unchanged. • For use in internal and external building applications above dpc level where there is a low to medium risk of fungal decay or insect attack - e.g. timber frame components, external joinery, construction, roofing and flooring timbers. VACSOL Aqua treated exterior woodwork should be subsequently protected with a maintained and appropriate surface coating.

SPECIALLY dEVELOPEd FOr ThE TrEATmEnT OF I-STUdS/I-bEAmS In TImbEr FrAmE COnSTrUCTIOn. VACSOL Aqualine has been specifically developed to allow the use of I-Studs/I-Beams in external walls where preservative protection is required to meet the latest standards. The in-line application system provides a fast, efficient and effective method of protecting I-Studs/I-Beams.

TO SPECIFY, the following wording is recommended . . . (UK only) • The timber as detailed . . . (insert quantity, dimensions, species and its end use/description of component) . . . is to be vacuum/pressure treated with VACSOL Aqua preservative to comply with the Treatment Code . . . (insert “VA” Code from the chart opposite). • For the specification of VACSOL Aqualine contact Lonza Wood Protection directly. • Following treatment, any areas of treated timber revealed by cross cuts, holes, notches, shall be brushed with VACSELE end-grain preservative. • Timber which is rip sawn, equalised, planed or heavily sanded must be returned to the treatment plant for re-treatment. • Specification clauses are available to download from the Lonza website - www.lonzawood.com


Proven performance against fungal decay and insect attack. Effective long-term protection against fungal and insect attack.

the bestfor choice forinternal timber and frame components, external joinery, designed use in construction, roofing and flooring external building applications abovetimbers. dpc level.

Specification chart for VACSOL Aqua treated timber COmPOnEnt grOUP

USE CLASS

Internal building timbers

1

COmPOnEnt dEtAiLS

This list is not exhaustive. If your timber component is not listed, please contact Lonza for further advice.

UK trEAtmEnt COdE

dESirEd SErViCE LifE

Roof timbers (dry): pitched roofs, rafters, purlins, joists, sarking, wall plates.

VA1

Roof timbers (Hylotrupes areas): Where there is a risk of House Longhorn Beetle (Hylotrupes bajulus L) according to the Building Regulations [5] (applicable to England and Wales), the Building Standards Scotland [6] and the Building Regulations (Northern Ireland) [7]: pitched roofs, rafters, purlins, joists, sarking, wall plates.

VA1

Roof timbers (risk of wetting): Where components are exposed to risk of wetting due to, for example, condensation: rafters, purlins, joists, sarking, wall plates, flat roofs (cold), enclosed beams, valley gutter timbers, flat roofs (warm inverted), exposed beams.

VA1

60 years

2

Tiling battens.

VA1

60 years

2

Sole plates.

VA3

60 years

2

Timber frame material: external walls/ground floor joists.

VA1

60 years

2

Specific treatment for I-Studs and I-Beams.

VAL

60 years

Softwood window frames & casings, soffits, barge and fascia boards, cladding, doors.

VA3

30 years

1 or 2

2

60 years

Useful documents The VACSOL Aqua Treated Timber User Guide provides full details on the properties and handling of VACSOL Aqua treated timber.

60 years

External building timbers/ softwood external joinery

3C†*

Hardwood exterior joinery§

3C†*

Hardwood window frames and casings, exterior doors and frames.

VA5

30 years

Termite proofed timber

1 or 2

Internal timbers above dpc and termite shield and easily inspected.

VA2

60 years

Cutting of VACSOL Aqua treated timbers Any treated timber surface exposed by cross-cutting, drilling, notching or boring must be brushed with VACSELE end-grain preservative to maintain the integrity of the treatment. The VACSELE Technical Data Sheet provides full information on this product.

SPECifiCAtiOnS And StAndArdS VACSOL Aqua preservative is tested in accordance with the requirements of EN 599, including extended field trial testing. VACSOL Aqua treated timber is treated in accordance with the penetration and retention requirements given in BS 8417. Care should be taken when specifying timber species to ensure that they can be treated in accordance with these penetration and retention requirements. Use Classes are defined in EN 335. VACSOL Aqua treated timber meets NBS (Z12), NHBC and WPA National Specifications. Lonza advises specifiers/users to ask for a confirmation of treatment from the supplier as part of the specification/purchase process.

3C†*

Plywood#

VACSOL Aqua treated timber must only be used above damp proof course level and not in ground contact.

1 or 2

3C†*

External timbers above dpc and termite shield and easily inspected.

VA2

30 years

EN 636 Humid Grade (BS EN 314 Part 2 bonding class 2).

VA3

60 years

EN 636 Exterior Grade (BS EN 314 Part 2 bonding class 3) or WBP (weather and boil proof).

VA3

30 years

dESirEd SErViCE LifE The desired service life does not provide a guarantee of performance but an indication of the expectation against which the recommendations for timber treatment are drawn up, assuming good design and normal conditions of use.

§

Contact Lonza Wood Protection to confirm suitability of particular hardwoods for treatment, due to potential colour variation.

Vacsol Aqua treated exterior woodwork should be subsequently protected with a maintained and appropriate surface coating.

*

In accordance with EN 335: 2013 Use Class 3 can also be sub-classified as 3.1 and 3.2 respectively.

#

Always check suitability for treatment with the plywood supplier.


Low Pressure Treated Timber

Low pressure preservative treatment process VACSOL Aqua treated timber is impregnated with VACSOL Aqua timber preservative under controlled conditions by double vacuum/low pressure (VAC-VAC) technology in an enclosed system.

1

2

Vacuum created and timber cells evacuated of air.

Vessel flooded under vacuum. The vacuum release enables the VACSOL Aqua preservative to penetrate into the timber cells under atmospheric pressure, in order to achieve a target penetration for the specified Use Class.

3

4

A second vacuum is applied to evacuate the timber cells of excess preservative. Timber surface wet.

Venting of atmospheric pressure (second or ‘double’ vacuum) drives any surface preservative back into the timber cells. Timber surface drip dry.

VACSOL Aqualine treatment for I-Studs/I-Beams involves an in-line, vacuumatic coating system.

Availability of treated timber/specific treatments VACSOL Aqua and VACSOL Aqualine treated timber requirements are usually processed to order. Specific treatments are available through a wide network of timber companies and treaters throughout Europe. For details on your nearest supplier, please contact Lonza at the address below.

VACSOL family

© Copyright 2013 Lonza Wood Protection. ™ Vacsol, Vac-Vac and Vacsele are registered trademarks of Arch Timber Protection, a Lonza company. Lonza Wood Protection is a business of Arch Timber Protection, a Lonza company. Disclaimer: Whilst every attempt has been made to ensure the accuracy and reliability of the information contained in this document, Lonza Wood Protection gives no undertaking to that effect and no responsibility can be accepted for reliance on this information. Lonza Wood Protection updates its literature as and when necessary. Please ensure you have an up to date copy.

Wheldon Road, Castleford, West Yorkshire, WF10 2JT. Tel: +44 (0)1977 714000 Fax: +44 (0)1977 714001 E-Mail: timberprotectionadvice.ukca@lonza.com

www.lonzawood.com


Issued May 2014

Treated Timber USER GUIDE Tanalith E, Tanalith Extra & Tanatone Treated Timbers

TANALITH E pressure treated timber is timber which has been impregnated with TANALITH E wood preservative under controlled conditions in a vacuum pressure timber impregnation plant. TANALITH E is a water based wood preservative that contains copper and proven organic biocides. When impregnated into the timber the preservative components bond with the wood structure and cannot easily be removed. TANALITH E pressure treated timber has a long term protection against fungal and insect attack, including termites, for both in and out of ground contact, interior and exterior applications when treated to the correct end use specification. TANALITH E pressure treated timber has an initial natural green colouration. Upon external exposure, the green colour slowly weathers to a warm, honey brown and in the longer term becomes a natural silver grey. This weathering process does not indicate any loss of preservative protection. TANALITH E pressure treated timber is also available with built-in water repellent (TANALITH Extra) or builtin brown colour (TANATONE). With the benefit of water repellent properties, TANALITH Extra pressure treated timber is ideal for outdoor leisure and decorative timbers such as decking, cladding and playground equipment. TANATONE treated timber has a brown colouration as opposed to the traditional TANALITH green. It is ideal for rough sawn timber fencing and landscaping applications. Recommendations provided for TANALITH E pressure treated timber apply equally to TANALITH Extra and TANATONE pressure treated timber, unless otherwise stated.

TANALITH E Wood Preservatives

• Use Class 1 - internal building timbers - no risk of wetting.

TANALITH E wood preservatives are approved for use by the relevant regulatory authorities in the markets it is used. The biocides contained in TANALITH E wood preservatives are being supported under the Biocidal Products Regulation.

• Use Class 3 coated - external timbers used above ground contact and coated.

Treatment Specifications

TANALITH E treatment process parameters can be varied, taking into account timber species, desired service life and to match the end use (Use Class) of the timber. It is therefore extremely important that the end use and species of the timber are clearly stated within the treatment specification. Use Classes are defined in EN 335:2013 but can be summarised as follows:

• Use Class 2 - internal building timbers - risk of wetting.

• Use Class 3 uncoated - external timbers used above ground contact and uncoated. • Use Class 4 - external timbers used in ground or fresh water contact. In accordance with EN 335:2013 Use Class 3 can also be sub-classified as 3.1 and 3.2 respectively. The interpretation of these sub-classes may vary from country to country. TANALITH E pressure treated timbers can be produced for any above Use Classes. The specific end use suitability of ready treated TANALITH E timbers should be confirmed by the supplier of the treated timber.


Treated Timber USER GUIDE Tanalith E, Tanalith Extra & Tanatone Treated Timbers Treated Timber Appearance

Gluing

Colour variations of TANALITH E treated timber may occur due to the natural variability of the relative proportions of heartwood and sapwood and darkening of some hardwoods may occur. Upon external exposure, the initial green colour of TANALITH E treated timber slowly weathers to a warm, honey brown and in the longer term becomes a natural silver grey. This weathering process does not indicate any loss of preservative protection.

TANALITH E pressure treated timber dried to less than 20% moisture content and in equilibrium or within 5% of its expected in-service moisture content, may be glued with most commonly available adhesives.

If required, the green colour of TANALITH E treated timber can be refreshed at any stage using coating products such as RESTOL Wood Oil, available in Garden Timber Green. Always follow the coating manufacturer’s instructions in these situations. For more information on RESTOL Wood Oil visit www.restol.info TANATONE pressure treated timber with built-in colour has a brown appearance. TANATONE will not hide or mask wood grain nor will it totally mask discolouration caused by weathering or dirt, fungal staining or wood defects. In addition, some resinous softwoods, eg redwood, may exhibit resin flecking or resin bloom around knots if treated when the timber is still fresh/unseasoned. This can occur with both TANATONE and TANALITH E pressure treated timber, but may be accentuated by TANATONE. As with all colour applications to timber, the brown colour of TANATONE treatment will fade with time. If required, the colour can be refreshed with a brush-on colour product such as RESTOL Wood Oil. Enhanced protection against the weather can be obtained by using TANALITH Extra pressure treated timber with built-in water repellent. Brush applied water repellent coatings, such as RESTOL Wood Oil can also be used. These are particularly effective when applied as a regular maintenance product to the surface of TANALITH Extra pressure treated timber. Note that timber is a variable and natural product. Occasionally timber containing high or mobile resin levels can give a blue colouration at the point of treatment. Upon weathering this fades rapidly into the overall colouration of the treated timber.

Post-Treatment Machining

TANALITH E pressure treated timber may be glued after cleaning off any surface deposits or dirt with a wire brush, or after a light sanding. In consultation with the adhesive manufacturer, select an adhesive appropriate to the in-service exposure condition and appropriate for load bearing or non-load bearing requirements. Consult the glue manufacturer on the suitability and use of their particular product and follow the directions of the appropriate regional standards. For load bearing constructions, phenol resorcinol formaldehyde, resorcinol formaldehyde, phenol formaldehyde, melamine urea formaldehyde, melamine formaldehyde, urea formaldehyde, emulsion polymer isocyanate glues are generally used. For non-load bearing constructions, emulsion polymer isocyanate, polyurethane, polyvinyl acetate, urea formaldehyde, melamine urea formaldehyde, melamine formaldehyde and phenol resorcinol formaldehyde glues are generally used. For exterior or damp conditions, phenol resorcinol formaldehyde, resorcinol formaldehyde or phenol formaldehyde glues are generally used. For internal dry conditions, resorcinol formaldehyde, phenol formaldehyde, melamine urea formaldehyde casein, polyvinyl acetate, urea formaldehyde, emulsion polymer isocyanate glues are generally used.

Surface Coatings

TANALITH E pressure treated timber does not have to be painted or stained to maintain its preservative properties. Many coating products are available on the market. Always consult the coating manufacturer’s recommendations before applying a coating product to TANALITH E pressure treated timber. If TANALITH E pressure treated timber is to be painted, stained or varnished, the timber should be dried throughout the cross section. Always follow the coating manufacturer’s instructions, taking note of the recommended maximum moisture content prior to application.

As far as possible all cutting, machining, notching and boring is to be carried out prior to treatment.

The preservative treatment is not a substitute for sealing of knots, base coating or priming.

Where cutting, machining, notching and boring has to be carried out to treated timber, the area of timber revealed by the cross cuts, holes or notches must be liberally brushed with a suitable end grain preservative in accordance with the manufacturer’s instructions to maintain the integrity of the preservative protection.

If waterbased coatings are applied, some discolouration may occur in exceptional circumstances. If this happens, allow the coating to dry completely. Then apply an additional coat of product, preferably one with a high build, high solids content. It is NOT recommended to apply opaque paint systems to TANATONE pressure treated timber.

Pieces which are rip sawn, thicknessed, equalised or planed must be returned to the supplier of the treated timber for re-treatment.

Metal Fixings & Fittings

On no account are fence posts to be pointed after treatment. The shortening of posts and columns should be avoided if possible, but in any event cross cutting must be restricted to the top of the post or column and the cross cut surface must liberally brushed with a suitable end grain preservative in accordance with instructions on the product label.

It is important to follow the recommendations of the manufacturer of any metal products used for specific advice regarding suitability, desired service life expectations and particular exposure conditions.

For more information on end grain preservatives contact the Lonza Wood Protection Advisory Service.

General Advice

TANALITH E pressure treated timber has a long life expectancy and it is appropriate to use metal fixings and fastenings that will have a comparable length of life.


Treated Timber USER GUIDE Tanalith E, Tanalith Extra & Tanatone Treated Timbers

• Performance of metal fixings is influenced by the environmental conditions including moisture content, temperature, atmospheric pollution, proximity to coastal locations, timber species, as well as the thickness of any galvanising. • For exterior use, where the timber is likely to become wet and a long service life is required, greater corrosion resistance will be achieved with use of austenitic grade 316 stainless steel, silicone bronze or copper in preference to other types of fittings. • Galvanising provides a sacrificial zinc barrier. It is important that the specifier/end user is aware that there are many thicknesses of galvanised coating available and the thicker the galvanised coating the longer the expected service life. The level of galvanising should be commensurate with the end use. The use of an automated nail gun may break the galvanised layer in lower grade metal fixings and compromise their performance at the outset. • Electroplated metals only provide a thin coating and are unsuitable for exterior applications. • It is good practice to drill pilot holes for fixings, in particular when screwing near the edge or end of a piece of timber. • Attach connectors, fasteners and fittings after preservative treatment and only after the timber has re-dried to less than 20% moisture content. • In addition to the above, for internal building timbers, e.g. trussed rafters, it is recommended to re-dry the timber to a moisture content of 22% or less before assembly and to maintain the timber in this condition during storage and delivery to site. • To prevent bimetallic corrosion between fastener and connector components it is important not to mix metals in the same connection. DO NOT mix galvanised and stainless steel components.

Typical Applications It is advisable to consult with Lonza Wood Protection using the contact details given in this document if in doubt about any particular area of application or compliance with other relevant standards or specifications. This list below, which is not totally exhaustive, gives an indication of the range of timbers and timber based products which can be treated with TANALITH E wood preservative. The treatment process parameters are varied to match the end use of the timber and its species. It is therefore extremely important that you make sure that the timber has been treated to the correct specification. The use of TANALITH Extra water repellent treated timber may be advisable for certain end use applications, such as decking, cladding and playground equipment.

Building

Structural elements and general timbers in domestic, commercial and public buildings, such as wall frames, sole plates, beams, joists, subfloors, roof timbers, external joinery, battens, cladding, roof shingles.

Garden & Landscaping

Decking systems, pergolas, gazebos, bridges, summer houses, soil retaining walls, timbers around fish ponds (but not in direct contact with the water), playground equipment, lawn edging, fencing, picnic benches and tables, way signs and litter bins. For certain applications,particularly with thin cladding type timbers, it may be appropriate to use a brush-on water repellent or TANALITH Extra treated timber which has a built-in water repellent.

Agricultural & Horticultural

Earth retaining vegetable beds (use of pressure treated timber does not affect organic status), fruit tree stakes, hop poles, vine stakes

Enclosures/Fencing

• Refer to local guidelines for slating and tiling. Nails for use with slates should be of copper, phosphor or silicon bronze. Nails for use with tiles should be austenitic stainless steel, copper, phosphor or silicon bronze. The use of aluminium and galvanised steel nails is NOT recommended.

Natural round, machine turned and square sawn fence posts, rails, droppers, gates and gate posts, stiles and highway, farm and security fencing

• Eurocode 5 (EN 1995-1-1: 2004) gives minimum specifications for material protection against corrosion for fasteners and fixings used in internal building, low hazard situations (Use Classes 1 and 2) where the moisture content of the treated timber will not exceed 20% throughout its service life.

Floors and other timbers for railway and road vehicles, container floors and linings, packing cases, cable drums and hatch covers. For treatments to meet Australian Quarantine Regulations (AQIS) contact Lonza Wood Protection directly for the latest information.

• Direct contact with aluminium should be avoided where the moisture content will exceed 18% or where condensation is possible.

Transmission poles, decking, shells, gantries, bridges and bridge decks, handrails, cable ducting and sound barriers.

• Where the use of aluminium is unavoidable in situations where moisture content will exceed 18%, it must be separated from the timber using a bituminous, epoxy or other impervious barrier or electrically insulating coating. The use of nylon/plastic washers is recommended. • Fixings and fastenings used on safety critical and load bearing components should be inspected regularly and replaced if necessary. • Specialist advice should be obtained in the selection of connectors for use in swimming pool buildings. Detailed advice is contained in the Nickel Development Institute document Stainless Steel in Swimming Pool Buildings 1995.

Transport

Engineering

End Use Considerations

TANALITH E pressure treated timber can be used in internal and external building applications and outdoors, both in ground contact and above the ground, without any need for further protection. TANALITH E pressure treated timber is treated to meet the requirements of a particular end use. When using timber for exterior situations, either treated or untreated, consideration should be given to the propensity of the material to stain light coloured adjacent faces, such as render, paving flags or coated timber surfaces, with its natural extractives during the weathering process. This staining effect can be highlighted where TANATONE treated timber has been selected, although the potential for this to occur does reduce with time.


Treated Timber USER GUIDE Tanalith E, Tanalith Extra & Tanatone Treated Timbers Where used in this external environment, it is highly recommended that contact between the timber and these surfaces is eliminated by design, in order to prevent surface discolouration. Where close tolerance work is involved it is advisable to pre-machine the timber at the in-service equilibrium moisture content prior to treatment. Consultation with the treatment supplier is advised in these situations. When used in construction applications it is always best practice for preservative treated timbers to be dried down to the in-service moisture content prior to fabrication. Treated timber should not be used where it may come into contact with drinking water or for food preparation surfaces/structures or containers for storage. When considering the use of TANALITH E pressure treated timber around fishponds, please contact Lonza Wood Protection for advice. If supplying timber for treatment it is best practice to prepare the timber as fully as possible prior to treatment to ensure best results. If any cutting, notching or drilling is made to the treated timber following treatment, any exposed surfaces should be liberally swabbed with an appropriate end grain preservative to maintain the integrity of the treatment.

Handling Precautions

You should have received the treated timber in a drip-free condition with no sign of preservative fluid on the surface. If this is not the case, the timber should be stored open stacked under ventilated conditions and protected from rain and snow to dry before use. When working with timber, wear gloves to protect the skin against abrasions and splinters. Any cuts and abrasions should be protected by a waterproof dressing. When power-sawing and machining, wear goggles to protect the eyes from flying particles. Wear a dust mask and, whenever possible, perform these operations outdoors to avoid accumulations of airborne sawdust or use a suitable dust extraction system around any mechanical saw or planing machine. Avoid frequent or prolonged inhalation of sawdust. Consult local regulatory authorities for further information on workplace exposure limits for wood dust.

Personal Hygiene After handling or working with treated timber, all exposed skin should be washed before commencing other activities, especially eating, drinking, smoking or going to the toilet. If sawdust accumulates on clothes, clean them before re-use. Launder heavily soiled clothes separately from other household wash items.

On-Site Precautions

All sawdust and construction debris should be cleaned up and disposed following local regulations.

Waste Disposal

TANALITH E pressure treated timber is not classified as hazardous waste. Local market regulations should be referred to. TANALITH E treated timber and post treatment processing wastes, such as sawdust and offcuts, must not be used for animal litter or bedding or for fuel in barbecues, cooking stoves or grates. Domestic end users should dispose of any waste treated timber, sawdust or ash through the ordinary waste collection service or at a local authority amenity/disposal site. Any waste timber, sawdust or redundant timber from commercial or industrial use (e.g. construction sites) should preferably be recycled by reuse, or disposed of to an authorised landfill or to a correctly controlled and approved waste incinerator.

Further Information

For further information with respect toTANALITH E, TANALITH Extra, TANATONE treated timbers, end grain preservatives or RESTOL Wood Oil please contact Lonza Wood Protection using the contact details below. Use biocides safely. Always read the label and product information before use.

In order to prevent injury, care should be taken when lifting or moving timber. These handling precautions equally apply to untreated and treated timber.

Š Copyright 2014 Lonza Wood Protection. Ž Tanalith, Tanatone and Restol are registered trademarks of Arch Timber Protection, a Lonza company. Lonza Wood Protection is a business of Arch Timber Protection, a Lonza company. Disclaimer: Whilst every attempt has been made to ensure the accuracy and reliability of the information contained in this document, Lonza Wood Protection gives no undertaking to that effect and no responsibility can be accepted for reliance on this information. Lonza Wood Protection updates its literature as and when necessary. Please ensure you have an up to date copy.

Wheldon Road, Castleford, West Yorkshire,WF10 2JT. Tel: +44 (0)1977 714000 Fax: +44 (0)1977 714001 email: timberprotectionadvice.ukca@lonza.com www.lonzawood.com


Issued May 2014

Treated Timber USER GUIDE Vacsol Aqua Treated Timbers

VACSOL Aqua treated timber is timber which has been impregnated with VACSOL Aqua wood preservative under controlled conditions in a double vacuum, low pressure timber impregnation plant (VAC-VAC plant). VACSOL Aqua is a waterbased wood preservative that contains organic active ingredients (triazole fungicides and an insecticide). VACSOL Aqua treated timber gives long term protection against fungal and insect attack, for both interior and exterior (above ground contact) construction timber and joinery applications. VACSOL Aqua treated timber must only be used above the damp proof course level and/or above ground contact. Exterior joinery/woodwork must be subsequently protected with an appropriate and maintained surface coating. In termite areas, VACSOL Aqua treated timber should be used above the termite shield. The appearance of VACSOL Aqua treated timber following treatment is virtually unchanged. However, a colourant is often included to facilitate identification of treatment.

Vacsol Aqua Wood Preservative

Treated Timber Appearance

VACSOL Aqua wood preservatives are approved for use by the relevant regulatory authorities in the markets they are used. The biocides contained in VACSOL Aqua wood preservatives are being supported under the Biocidal Products Regulation.

After the application of VACSOL Aqua wood preservative by the VACVAC process, the appearance of the timber is virtually unchanged. However, a colourant is often included to facilitate identification of treatment.

Treatment Specifications

VACSOL Aqua treatment process parameters can be varied, taking into account timber species, desired service life and to match the end use (Use Class) of the timber. It is therefore extremely important that the end use and species of the timber are clearly stated within the treatment specification. Use Classes are defined in BS EN 335 2013 but can be summarised as follows: • Use Class 1 - internal building timbers - no risk of wetting. • Use Class 2 - internal building timbers - risk of wetting. • Use Class 3 coated - external timbers used above ground contact and coated. In accordance with EN 335:2013 Use Class 3 can also be sub-classified as 3.1 and 3.2 respectively. The interpretation of these sub-classes may vary from country to country. VACSOL Aqua treated timbers can be produced to meet the requirements of Use Classes 1, 2 and 3 coated.

Experience has shown to date that there is no particular problem with grain raising. However, as with all water based products, there is potential for this to take place. Colour variations may occur due to the natural variability of the relative proportions of heartwood and sapwood and darkening of some hardwoods may occur. Trials should be carried out on decorative timber species (particularly hardwood species) to check any shade changes prior to treatment of the full commercial batch. Further information can be obtained from the Lonza Wood Protection Advisory Service.

Post-Treatment Storage and Collection of Treated Timber When received, VACSOL Aqua treated timber should be free from surface liquid. Drying will be accelerated when stored in a wellventilated, weather protected area. Impregnation of timber with VACSOL Aqua imparts a low moisture uptake. This may cause slight swelling across the end grain surfaces.


Treated Timber USER GUIDE Vacsol Aqua Treated Timbers

If this occurs treated material should be stored, open stacked, to provide sufficient ventilation for moisture to evaporate. The timber will re-dry to its original dimensions when placed in the same temperature and humidity conditions in which it was machined and profiled prior to treatment. Flat items such as sheets of plywood should be separated and either stickered horizontally or stacked more or less vertically, with air space between them to promote drying. Building components stored on a building site should be clear of the ground and stacked and protected so that they are not distorted or saturated by rainwater. Trussed rafters should be stored on-site and out of ground contact. If the storage time exceeds two weeks recommendations of regional standards and associations should be followed.

Post-Treatment Machining

As far as possible all cutting, machining, notching and boring is to be carried out prior to treatment. Some cross-cutting on-site is unavoidable. This will expose an untreated core and it is imperative that cross-cuts, notches and bored holes be liberally swabbed with an approved end grain preservative to maintain the integrity of the preservative protection. Rip sawing, grooving, planing and heavy sanding are not permitted unless the timber is returned for re-treatment to maintain the integrity of the preservative protection.

Surface Coatings Over absorbent timber may adversely affect decoration. Care should be taken to ensure adequate drying of timbers suspected of over absorbency or thin timbers, e.g. cladding and beading, before any surface coating is applied. Many coating products are available on the market and whilst Lonza Wood Protection has tested a broad range of these for compatibility with VACSOL Aqua treated timber it is not possible to test all of them. Always consult the coating manufacturer’s recommendations before applying a coating product to VACSOL Aqua treated timber. The following notes apply to common painting practice.

Solvent Based Decorative Coatings

VACSOL Aqua treated timber • Freshly treated VACSOL Aqua timber should be allowed to dry for 48 hours, open-stacked in an undercover, well-ventilated area, prior to application of primer or basecoat (see section on over absorbency). • Where acrylic primers are to be used, it is advisable to carry out a simple test to establish compatibility. • When using aluminium leafing primer, longer periods of drying may be necessary after VACSOL Aqua treatment due to the sealing characteristics of this type of coating. • A further 7 days should elapse before the final paint or stain finishes are applied, allowing normal drying time before applying each coat.

• PVA emulsion

VACSOL Aqua treated plywood The time allowed between treatment and priming depends upon drying conditions, the types and thickness of plywood used and the amount of preservative absorbed during treatment. Before applying a basecoat, it is recommended that at least 72 hours be allowed from the time that the sheets of treated plywood are separated for drying under favourable conditions, and that a further 7 days elapse before final paint/stains are applied.

When bonding preservative treated timber, care should be taken to prepare the surfaces prior to application of the adhesive.

Water Based Decorative Coatings

Gluing

VACSOL Aqua treated timber may be bonded with a range of adhesives, including the following: • Resorcinol Formaldehyde or Phenol Formaldehyde • Urea Formaldehyde

The glue manufacturer's instructions should be followed at all times. Where impact adhesives are to be used or highly stressed glue joints are to be made (e.g. 'Glulam' beams) using VACSOL Aqua treated timber, advice should be sought from the Lonza Wood Protection Advisory Service.

Putties, Mastics & Sealants

Reference should be made to regional standards and codes of practice for suitable materials for glazing. The choice of putties, mastics and sealants is dictated by the characteristics of the primer/basecoat used. It is not influenced by the fact that the timber has been VACSOL Aqua treated. Where any doubt exists advice should be sought from the manufacturer of the putty, mastic or sealant in the first instance and then from Lonza Wood Protection.

VACSOL Aqua treated timber • Freshly treated VACSOL Aqua timber should be allowed to dry for 48 hours, open-stacked in a well ventilated area, prior to application of a primer or basecoat. A further 7 days should elapse before the final paint or stain finishes are applied, allowing normal drying time before applying each coat.

VACSOL Aqua treated plywood • The time allowed between treatment and priming depends upon drying conditions, the types and thickness of plywood used and the amount of preservative absorbed during treatment. Before applying a basecoat, it is recommended that at least 72 hours be allowed from the time that the sheets of treated plywood are separated for drying under favourable conditions and that a further 7 days elapse before final paint/stains are applied.


Treated Timber USER GUIDE Vacsol Aqua Treated Timbers Metal Fixings & Fittings General Advice

It is important to follow the recommendations of the manufacturer of any metal products used for specific advice regarding suitability, desired service life expectations and particular exposure conditions. VACSOL Aqua treated timber has a long life expectancy and it is appropriate to use metal fixings and fastenings that will have a comparable length of life. • VACSOL Aqua treatment has no corrosive effect on mild steel fittings and fixtures. The timber must be at a moisture content below 20% before mild steel fixings and fittings are applied and must remain below 20% in service. • Where higher moisture contents (above 20%) are expected in service, galvanised steel, stainless steel, copper, aluminium or brass fixings and fittings should be used. At least 24 hours should elapse after treatment before these fixings are applied. • For trussed rafter manufacture, fixings and fittings recommendations of regional standards and associations should be followed. • Zinc sheeting can be applied to VACSOL Aqua treated timber so long as the timber is completely dried - less than 28% moisture content.

Floor Coverings and Plasterboard/ Absorbent Composite Board Materials

Where VACSOL Aqua treated timber is to be in contact with floor coverings, plasterboard or other absorbent material, care should be taken to ensure adequate moisture evaporation has taken place prior to fixing, otherwise the substrate may absorb excess VACSOL Aqua solution (see section on over absorbency). If necessary, the moisture content of the timber should be checked. However it should be noted that moisture meters may be affected by preservative treatment. Moisture meters with insulated probes should therefore be used.

Typical Applications

If in doubt about any particular area of application or compliance with other relevant standards or specifications, it is advisable to consult with Lonza Wood Protection using the contact details given in this document. This list, which is not totally exhaustive, gives an indication of the range of timbers and timber based products which can be treated with VACSOL Aqua wood preservative. The treatment process parameters are varied to match the end use of the timber and its species. It is therefore extremely important that you make sure that the timber has been treated to the correct specification.

Hardwood Exterior Joinery

Hardwood window frames and casings, exterior doors and frames.

Plywoods

Under previous systems WBP (weather and boil-proof) grade plywood was classified under a British Standard which has now been withdrawn. Plywood grades are based on EN 636 (Dry, Humid and Exterior classifications), which themselves are based on bonding classes 1, 2 and 3 from EN 314 Part 2. Plywood that is either WBP or EN 636 Exterior grade (EN 314 Part 2 bonding class 3) should now be specified. Humid grade (bonding class 2) might be acceptable, but the board

manufacturer or supplier should be asked to confirm that Humid grade board can be put through a double vacuum (VAC-VAC) treatment process.

Internal and External Building Timbers

Structural elements and general timbers in domestic, commercial and public buildings, such as wall frames, sole plates, beams, joists, subfloors, roof timbers, battens, cladding, roof shingles. When used in construction applications it is always best practice for preservative treated timbers to be dried down to the in-service moisture content prior to fabrication.

Softwood External Joinery

Softwood window frames and casings, soffits, barge and fascia boards, cladding, load bearing joinery and doors.

Misuse

DO NOT Use VACSOL Aqua Treated Timber in the Following Situations: 1. Below dpc and/or in ground contact. 2. In termite areas below the termite shield. 3. In direct contact with foodstuffs. 4. In an exterior situation without a protective coating.

Over Absorbancy

Occasionally, a parcel of timber will contain some pieces which have an abnormally permeable sapwood. Such pieces should be placed on one side for prolonged drying before overpainting/staining or the fixing of porous materials which may absorb the excess solution and adversely affect subsequent decoration.

Handling Precautions

You should have received the treated timber in a drip-free condition with no sign of preservative fluid on the surface. If this is not the case, the timber should be stored open stacked under ventilated conditions and protected from rain and snow to dry before use. When working with timber, wear gloves to protect the skin against abrasions and splinters. Any cuts and abrasions should be protected by a waterproof dressing. When power-sawing and machining, wear goggles to protect the eyes from flying particles. Wear a dust mask and, whenever possible, perform these operations outdoors to avoid accumulations of airborne sawdust or use a suitable dust extraction system around any mechanical saw or planing machine. Avoid frequent or prolonged inhalation of sawdust. Consult local regulatory authorities for further information on workplace exposure limits for wood dust. In order to prevent injury, care should be taken when lifting or moving timber. These handling precautions equally apply to untreated and treated timber.

Personal Hygiene

After handling or working with treated timber, all exposed skin should be washed before commencing other activities, especially eating, drinking, smoking or going to the toilet. If sawdust accumulates on clothes, clean them before reuse. Launder heavily soiled clothes separately from other household wash items.


Treated Timber USER GUIDE Vacsol Aqua Treated Timbers On-Site Precautions All sawdust and construction debris should be cleaned up and disposed of after construction.

Waste Disposal

VACSOL Aqua treated timber is classified as hazardous waste. Post treatment processing wastes, such as sawdust and off-cuts, must not be used for animal litter or bedding. VACSOL Aqua treated wood should not be used for fuel in barbecues, cooking stoves or grates. Any waste timber, sawdust or redundant timber from commercial or industrial use (e.g. construction sites) should preferably be recycled by reuse, or disposed of to an authorised landfill or to a correctly controlled and approved waste incinerator.

Further Information

For further information on VACSOL Aqua treated timbers or end grain preservatives please contact Lonza Wood Protection using the contact details below.

Š Copyright 2014 Lonza Wood Protection. ™ VACSOL is a registered trademark of Arch Timber Protection, a Lonza company. Lonza Wood Protection is a business of Arch Timber Protection, a Lonza company. Disclaimer: Whilst every attempt has been made to ensure the accuracy and reliability of the information contained in this document, Lonza Wood Protection gives no undertaking to that effect and no responsibility can be accepted for reliance on this information. Lonza Wood Protection updates its literature as and when necessary. Please ensure you have an up to date copy.

Wheldon Road, Castleford, West Yorkshire, WF10 2JT. Tel: +44 (0)1977 714000 Fax: +44 (0)1977 714001 email: timberprotectionadvice.ukca@lonza.com www.lonzawood.com


Beesley & Fildes Timber Treatment Details