Raymond & Fung King Liu James & Agnes Tiernan
41 & 43 Logan Road Wembley HA9 8PY External Insulation (LEAF funded works) Scope of Works February 2012 ICE12.158.701.003
ICE Architects Ltd. 151 Rosebery Avenue London EC1R 4AB | T:+44 20 3215 0015 | www.ice-architects.com
This page is blank to facilitate back to back printing ICE Environmental Policy 2012
Objective 4: Reduce waste and make better use of material resources
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1.0 Introduction & General Conditions of Work. 1.1. The proposed work is the external insulation of a pair of semi-detached 1930s houses at 41 and 43 Logan Road Wembley Middlesex HA9 9PY. The work has been funded by the Local Energy Assessment Fund (LEAF) through a grant to the South Kenton Preston Park Residents Association (SKPPRA). st
1.2. The first issue of this document is on the 1 March 2012 – further issues with amended paragraphs will be indicated here. Deleted paragraphs numbers will be retained in subsequent revisions but deletion will be indicated by note after paragraph number – ‘number not used’. Issue Date st 1 March 2012
Status A- First issue for contract signature
1.3. The extent of the existing house is shown on the following construction drawings: ICE12.158 AL(0)1
Existing: Front & Rear Elevations
1.4. The contract areas of the house are as follows: • • •
External walls The front and rear garden of both properties The side passage connecting front and rear garden on both houses.
The contractor must make alternative arrangements outside of the site area for toilet and welfare facilities – the contract area does not include any part of the interior of either house. All other areas of the house and property not defined above are outside the contract area and should not be accessed by the contractor. Requests to access these areas for checking of services etc. should be set out in advance to the architect and access only undertaken following approval from the architect. 1.5. The proposed work to the houses is as follows – a detailed specification is provided at section 4.0 and 5.0 below. 1.6. Front Elevation to 41 & 43 Logan Road Clean down existing render and identify to the architect any areas where remedial work is required, Following instruction from the architect repair existing render where remedial work required, Remove rainwater pipes, lights and house number – safely set aside for reuse following installation of insulation. Install minimum 70mm Envirowall phenolic insulation with adhesive and mechanical fixing through existing render to solid brick wall. Trim insulation flush with existing line of DPC and extend to underside of roof between rafters. Finish with render mesh and Envirowall Envirorend basecoat On exterior face to 41 Logan Road – ground and first floor finish with stone dash to match existing. On exterior face to 43 Logan Road fit brick slips full width of house at ground floor level and on brick feature at each end of front elevation full height of house. On exterior face to 43 Logan Road install render finish coat full width of house at first floor level to match existing white render finish.
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New render finish to be installed around the ends of insulation to abut with existing window frames.
1.7. Rear Elevation to 41 & 43 Logan Road Road Clean down existing render and identify to the architect any areas where remedial work is required, Following instruction from the architect repair existing render where remedial work required, Remove rainwater pipes, lights and safely set aside for reuse following installation of insulation. Install minimum 70mm Envirowall phenolic insulation with adhesive and mechanical fixing through existing render to solid brick wall. Trim insulation flush with existing line of DPC and extend to underside of roof between rafters. Finish with render mesh and Envirowall Envirorend basecoat Install minimum 450mm x 450mm timber block mechanically fixed through existing render to brick external wall to support satellite dish – on both 41 and 43. Finish render coats and mesh over timber block and mark location of block on finished face. On exterior face to 41 Logan Road – ground and first floor finish with stone dash to match existing. On exterior face to 43 Logan Road install render finish coat full width of house, and around rear extension at ground and first floors to match existing white render finish. New render finish to be installed around the ends of insulation to abut with existing window frames. 1.8. Side Elevation to 41 Logan Road Clean down existing render and identify to the architect any areas where remedial work is required, Following instruction from the architect repair existing render where remedial work required, Remove rainwater pipes, lights – safely set aside for reuse following installation of insulation. Install minimum 70mm Envirowall phenolic insulation with adhesive and mechanical fixing through existing render to solid brick wall. Trim insulation flush with existing line of DPC and extend to underside of roof between rafters. Finish with render mesh and Envirowall Envirorend basecoat On ground and first floor finish with stone dash to match existing. Install insulation and render finish across timber external door to under stair cupboard at ground floor level. Cut insulation and render finish either side of soil stack and around boiler flue. Install stop end beads at each break in render to ensure clean finish and protection against cracking. New render finish to be installed around the ends of insulation to abut with existing window frames. 1.9. Side Elevation Elevation to 43 Logan Road Clean down existing render and identify to the architect any areas where remedial work is required, Following instruction from the architect repair existing render where remedial work required,
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Remove rainwater pipes, lights – safely set aside for reuse following installation of insulation. Remove mesh guard to boiler flue and set aside for refixing. Install minimum 70mm Envirowall phenolic insulation with adhesive and mechanical fixing through existing render to solid brick wall. Trim insulation flush with existing line of DPC and extend to underside of roof between rafters. Finish with render mesh and Envirowall Envirorend basecoat On ground and first floor finish with render coat to match existing. Cut insulation and render finish either side of soil stack and around boiler flue. Install stop end beads at each break in render to ensure clean finish and protection against cracking. New render finish to be installed around the ends of insulation to abut with existing window frames.
1.10. The houses will be fully occupied for the course of the works. The contractor must take adequate care when working around an occupied building and ensure that safe access in and out of the building front and back is maintained for the occupants during the course of the works. 1.11. Some disruption will be cased to off-street parking as a result of the installation of scaffold access. The contractor should ensure that scaffold is erected to allow one off street parking space at the end of the construction workday is still available for the occupants of the house. The contractor or any vehicle associated with the contractor shall not park off-street in the resident’s property at 41 or 43 Logan Road. 1.12. The architect is ICE Architects Ltd, and all references to the architect mean ICE – telephone 020 3215 0015 (Michael Rushe or Toni Fryer). 1.13. Email contacts are; michael.rushe@ice-architects.com toni.fryer@ice-architects.com 1.14. There are no other consultants on the project during the construction phase and all queries must be raised with the architect. 1.15. ICE architects have carried out a designer’s risk assessment in preparing this scope of work and the residual risks are considered to be: • Buried services in the fabric of the building, • Offloading of materials in the street and transfer to the rear of the site, and onto scaffold areas • Persons working at height, on the installation of insulation and render finish, • Building on the boundary of the site and using the shared access and the maintenance of safe access to and from the adjacent properties at 39 and 43 Logan Road • The protection and the security of the building and its occupants during the contract works). Information on the mitigation of these risks – as they can be considered at the design phase is contained in the present document. Mitigation and avoidance of risk during construction will be the contractor’s responsibility and a plan prepared as set out below.
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1.16. The project is not notifiable under CDM 2007, - as work is for a domestic client – however even though the client does not hold specific responsibilities under CDM, contractors, sub-contractors and any other personnel on the site carrying out the works do have responsibility under CDM legislation. 1.17. The project works also affects the use and enjoyment of occupied buildings (No. 41 and 43) and of occupied buildings adjacent to the contract works – at 39 and 43 Logan Road – in addition to the safety and well being of those on site. 1.18. A short health and safety plan paying particular attention to access, material movement and working at heights will therefore be required from the contractor prior to the commencement of works on site. Health and safety information should also be included with the documentation obtained from the contractor on the erection of the scaffolding. 1.19. References in this document to the design team mean any member of staff of ICE. 1.20. Where the following scope of works refers to proprietary products this may be taken as the minimum standard of performance required. Alternative products may be used provided they are of equal performance and this can be certified by reference to Agrement certificates (BBA) or other independent body. 1.21. Where such certification cannot be produced or where there is doubt about the equivalent performance of the proposed product to that set out in this scope of work – the product described in this scope of work shall be installed. 2.0 Site security, Access, Safe Working and Contractor’s Facilities. 2.1. The contract works are two occupied homes and the contractor must ensure that no action by the contractor compromises the safety and security of the occupied houses. 2.2. Brent Council advise via their website that usual construction working hours in a residential area are expected to be: 8am to 6pm Monday to Friday 8am to 1pm Saturday Sunday – no work permitted. 2.3. As completion of the work is required in three weeks the contractor may work beyond these hours provided there is a formal agreement with both owners (41 and 43 Logan Road) and notice and formal agreement is reached with the adjoining owners (39 and 45 Logan Road). 2.4. If any complaints arise for working outside of the above hours the contractor is to liaise with those making the complaint and with the local authority to ensure satisfactory resolution of the complaint. The contractor must recognise that resolution of the complaint may include not working outside of the above designated hours. 2.5. At the end of each working day the houses and the site must be left secure and no debris or materials are to be stored in the front garden or side passageway of either 41 or 43 Logan Road or on the public footpath.
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2.6. The only access to the site is from Logan Road. 2.7. There are no facilities on site for the parking of contractor’s vehicles on site. Parking on the street must allow for the free flow of traffic in the street and not obstruct access to the street from adjacent properties. 2.8. Arrangements for the on-street location of skips must be made by the contractor with the local authority. Any units located on the street with approval must have a secure cover fitted each evening and at weekends. 2.9. Existing service drawings have not been obtained for the site area. The contractor should take steps by trace survey and surface marking or other method to ensure site operatives are aware of the location of buried services in either walls or below ground. 2.10. The contractor should draw up suitable precautions for working near buried services and provide these to site operatives. 2.11. Where service information is unclear or there is uncertainty about live services the contractor should undertake site investigations to confirm service locations and depths. With this information the contractor should convene an ‘all persons on site’ meeting to confirm the location of buried services. 2.12. The contractor should provide charged drills for mechanical fixing of insulation. For other activities the contractor may obtain a free electricity supply for the works from the normal outlets in the houses subject to using appropriate converters and full certification. Requirements for a phased supply other than the normal domestic power must be satisfied by the contractor’s own resources. 2.13. Each house owner will provide the power supply on the basis that the contractor supplies competent staff, only uses the supply in support of the installation works, and remains responsible for the safety and wellbeing of all staff working with the supply. 2.14. Site storage of materials is anticipated to be in the rear garden of each property. The contractor should agree a location with each property owner and ensure that this is kept clean and tidy at all times during the course of the works. Material where possible should be secured in this location at the end of the work shift on site. 2.15. No welfare facilities – team making, drying room, wash or toilet facilities are available on site. 2.16. Water supply on site may be used provided it is from a tap or source outside the house/s 3.0 Enabling & Preparatory Work: By Contractor. 3.1. The contractor should present a programme for the works, no later than one day prior to the commencement of work on site. 3.2. Brent Council and ICE Architects have environmental policies which seek to reduce construction waste, and to recycle materials where possible. Contractors will be expected to operate the following protocol on site;
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1. Does the element/material really need to be removed to proceed with the works, (if yes proceed to 2), 2. Can it be carefully removed for reuse elsewhere - see below for areas where existing elements are to be reused in the completed construction works) (if not proceed to 3), 3. Can it be broken down to specific materials – e.g. separate glass from frame, 4. Can these materials be stored on site and taken off site in a way that allows the material to be recycled. 3.3. The contractor is to remove external elements on each elevation as set out above and set aside for re-use. 4 .0 4.1
New External Walls Supply and install external insulation as shown on the following contract drawings: ICE12.158 AL(0)1 ICE12.158 C(0)1 ICE12.158 C(0)2 ICE12.158 C(0)3 ICE12.158 C(0)4 ICE12.158 C(0)5 ICE12.158 C(0)6 ICE12.158 C(0)7 ICE12.158 C(0)8 ICE12.158 C(0)9 ICE12.158 C(0)10 ICE12.158 C(0)11
Existing: Front & Rear Elevations Base Bead Detail Cill Detail Front Cill Detail Rear Window Reveal Detail A Window Reveal Detail B Drain Pipe & Render Step Detail Corner Detail Soffit Detail Window Head Detail Rainwater Pipe Detail Parapet Detail
4.2
SYSTEM SUPPLIER:- Envirowall Ltd., Orchard House, Aire Valley Business Centre, Keighley, Yorkshire, BD21 3DU Tel.01535 661633 Fax.01535 661933 email info@envirowall.co.uk web. www.envirowall.co.uk.
4.3
TYPE(S) OF COATING Granol Phenolic System with Granol G cement free base coat with Acrylic or Silicone Primer and Acrylic or Silicone top coat. Base Coat: Granol G Ref.GRBC101 Cement-free base coat. Dubbing out where existing render is out of line– this can be done with standard sand cement mortar to ensure adequate base for adhering insulation slabs Mesh: Envirowall glass fibre plastic coated alkali resistant reinforcing mesh Ref.EM1
4.4
Insulation: 1200X 600 Penolic Insulation boards 70mm thickness to deliver a new Uvalue through the external wall of 0.25W/m2K.
4.5
Primer: Granol Acrylic primer Ref.GRP101 or Silicone primer Ref.GRP102 Topcoat Granol Acrylic topcoat Ref.GRTC101 or Silicone Topcoat Ref.GRTC102
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4.6
Profiles: Base profiles to suit insulation manufactured from aluminium. Corner profiles to be UPVC with attached reinforcing mesh.
4.7
All insulation to be sealed at junctures with illmod 600 sealing tape 3-7mm.
4.8
Base coat to be Granol G cement-free base coat applied 2-3mm thick over insulation boards. Plastic coated glass fibre reinforcing mesh trowled into base coat mortar. Base coat mortar allowed to fully cure before applying Granol Acrylic or Silicone Primer.
4.9
Granol Acrylic or Silicone top coat to be applied and finished to an even texture. Finish to be dash, render finish or brick slips as set out above.
5.0 Installat Installation ion Requirements 5.1 The finished installation is to be weather tight under all anticipated conditions, capable of resisting all dead loads and design live loads including impact and wind loads and accommodating all thermal movements without damage. 5.2
IMPACT LOADING Impact resistance of finished walls to be 10Nm between 1.5 and 6m above ground level and 5Nm over 6m above ground level.
5.3
WIND LOADING Design Wind loads + 1.0kN/m2
5.4
SAMPLES Submit samples of 900mm x 600mm of insulated render with part PPC profile e.g. bellcast or undersill etc.) for approval. Keep approved samples on site for the duration of the contract for inspection/comparison purposes.
5.5
Provide similar sample of dash finish to No.41 and render and brick slip finish to 43 for inspection and approval prior to the installation of the final coat or brick slip.
5.6
UNIFORMITY OF COLOUR AND TEXTURE OF COATINGS Type/proportion of constituent materials: Unchanged once samples of coatings have been approved.
5.7
SITE STORAGE OF GRANOL MATERIALS Site storage and protection of Granol materials must be in accordance with the manufacture’s instructions.
5.8
MIXING OF RENDERS AND ADHESIVES All Granol renders are mixed using a paddle mixer in accordance with manufacturer’s recommendations.
5.9
WEATHER CONDITIONS Application of the system must only be carried out in suitable weather conditions. Granol renders and adhesives must not be applied in rain, fog or mist, at temperatures below 50C or above 300C or if exposure to frost is likely to occur during drying. Granol renders and adhesives must not be applied to saturated or frost bound walls and insulation boards. In sunny weather work should commence on the shady side of the
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building and be continued round following the sun to prevent the rendering drying out too rapidly. 5.10 COATING OF NEWLY APPLIED RENDER Coating of newly applied render is to be delayed as long as possible, particularly in wet weather, mist, fog or cold conditions, to allow the render to dry out and shrink so that the surface can be stopped and sealed when painted. A minimum of 48 hours in good drying conditions is normally recommended. 5.11 PROGRAMMING THE WORK The contractor must ensure that the work is programmed to be carried out during suitable weather conditions, taking into consideration seasonal variations and allow sufficient time in the programme for stoppages due to inclement weather. 5.12 PROTECTION TO NEW WORK The contractor must provide protection to new work during inclement weather using a protection system suited for the worst weather conditions that can reasonably be anticipated. The contractor must monitor local weather forecasts and if necessary, modify their protection system accordingly. Failure to carry out such protective measures must make any resulting failure in the Granol products or systems the sole responsibility of the main contractor. 5.13 AVOIDANCE OF COLOUR SHADING To minimise colour shade variations of and to avoid dry line jointing, continuous surfaces should be completed without a break. If breaks cannot be avoided they should able made where services or architectural features, such as drainpipes, reveals or lines of doors and windows, help mask cold joints. Where long uninterrupted runs are planned, bags of the material should be checked for batch numbers to safeguard colour consistency. Materials having the same batch number should be used to complete an elevation. 5.14 BS 5262: 1991 AND BS 8000: PART 10: 1995 All rendering should be in accordance with the relevant recommendations of BS 5262 : 1991, Code of Practice for external renderings, BS 8000 Part 10 : 1995, code of Practice for plastering and rendering, and Envirowall Limited’s instructions. BS 6150: 1991 AND BS 8000: PART 12: 1989. 5.15 All Granol masonry paints and decorative finishes must be applied during suitable weather conditions to dry backgrounds, strictly in accordance with Envirowall Limited’s instructions and the relevant clauses in BS 6150 : 1991, Code of Practice for painting of buildings, and BS 8000 : Part 12 : 1989, workmanship on building sites, Code of Practice for decorative wallcoverings and painting. 5.16 REPAIR TO DAMAGE The appropriate components must be used to repair damaged areas and procedures detailed in the Envirowall installation instructions. Conventional rendering techniques and Granol render materials are used to repair damage to the product. Damage to the product should be
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repaired immediately and repairs should be carried out in accordance with the relevant recommendations of BS 5262: 1991. Regular maintenance checks should be carried out on architectural details for shedding water and on external plumbing and fittings to prevent penetration of water into the rendering. 5.17 HEALTH AND SAFETY The fibres as used in Granol renders may irritate the skin. Protective clothing should be worn to avoid contact with both dry, unmixed material and with wet mortar. Great care must be taken to avoid contact with eyes. When mixing Granol materials a filter respirator should be worn. 5.17 Where excessive concentrations of dust may accumulate the measures defined in the Health and Safety Executive publication EH40/96 ‘Occupational Exposure Limits 1196 for unlisted substances should be followed. Note that EH40 is published annually and the current edition should be followed. 5.18 DURABILITY The system should remain effective for at least 30 years, provided any damage to the surface finish is repaired immediately, and regular maintenance is undertaken including checks on joints in the system and on external plumbing fitments to identify leakage of rainwater into the system, and appropriate steps are taken to correct the defects. 5.19 LIME BLOOM Render containing Portland cement may be subject to lime bloom during the application and curing process. The occurrence of this may be reduced by programming the work to be carried out during suitable weather conditions and by provision of adequate protection from rain, cold, and mist or fog conditions during curing and hardening of the render. The effect is less noticeable on lighter colours. It can be expected to disappear with time, the rate depending on the environment to which it is exposed. 5.20 All of the areas in the application at 41 and 43 Logan are areas where aesthetics is of immediate importance and therefore the contractor should allow for careful removal of lime bloom should the above precautions not be successful. 5.21 SPILLAGE OF GRANOL COATING MATERIALS AND MASONRY PAINTS Granol renders coatings and paints are highly adhesive and all necessary precautions must be taken to protect footpaths, windows, adjacent walls, roof surfaces etc. from spillage, which may cause stains. All windows and adjacent surfaces should be protected during the application of Envirowall and Granol products. 5.22 WINDOW SILL PROTECTION The existing window frames should be extended as shown on the drawings to a minimum of 50mm beyond the outside line of the Granol system. Samples of the finish cover strip to extended cills to be provided to the architect for approval prior to installation.
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5.23 SCAFFOLDING independent scaffolding should be used to avoid the need to subsequently make good holes and other breaks in the work. Where the scaffolding is required to be tied back to the building it is normal to recommend and provide access points for future scaffolding required for maintenance inspection and repairs. 5.24 The scaffolding must be arranged to enable good access to be obtained to the whole of the face of the building and sufficient clearance for working is to be provided between the scaffolding and the finished surface of the external wall insulation system. An allowance must be included for the thickness of the finished system on the face of the building. 5.25 LINE AND LEVEL OF BUILDING The terms “line and level” used in conjunction with this specification refer only to dealing with minor localised variations in the surface to which the system is applied. The contractor must inspect the existing wall and where necessary include for a bed coat of dubbing render to take up any variation in the flatness of the backing wall. 5.26 LINE AND LEVEL STOREY HEIGHT Surfaces should be sound, clean and free from all loose material. The flatness of the surfaces must be checked; this may be achieved using a straight edge spanning the storey height. Any excessive irregularities, i.e. greater than 10mm, must be made good using dubbing render prior to the installation to ensure that the insulation boards are installed with a smooth, in-plane finished surface. Horizontal projections, ledges etc. should be removed or dubbed out to provide a level surface to receive the system to the approval of the architect. 5.27 SEALING TAPE Prior to the application of the insulation boards, supply and apply Illmod 20/3 EWI sealing tape to seal all joints between all system abutments and against other materials e.g. window/door frames, soffit boards, projecting vents, gas and electric meter boxes etc. 5.28 FIXING AND LEVELLING OF BASE BEADS Supply and securely fix the following aluminium base profile beads using 6/5 hammerset screws at max. 300mm centres ensuring that the base profile is always fixed in the last plug slot on both ends of the plate. Unevenness in the wall surface should be overcome using packing shims and the base profile set flat and checked to ensure that it is true to line and level before securing to the structure. Fill any gaps between the base profile and the background with dubbing render. 5.29 At building corners, cut and mitre the base profile to size. Join mitred edges with base profile connection clips. Supply and fix aluminium base profile at base of insulation system and to a line approved by the architect. Join lengths of the support rails using base profile connection clips 5.30 BEDDING ADHESIVE Supply, mix and apply Granol -G Composite Mortar in accordance with the manufacturers printed instructions. Work in Granol -G Composite Mortar in a thin pressed trowelled coat across the whole surface of
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the insulation board and then apply with a 10 x 12mm – notched trowel Granol -G Composite Mortar across the whole surface of the prepared board. 5.31 APPLYING THE INSULATION Press the insulating boards firmly against the wall and adjust the position slightly to ensure that any skin which may have formed on the surface of the Granol -G Composite Mortar is broken. Press the boards firmly with a wooden board to ensure maximum contact of at least 40% between the Granol -G mortar and the background and continuously check the surface for flatness and plumb with a spirit level. 5.32 Regularly check that the board and board edges are firmly adhered to the background and, if necessary, remove and apply additional Granol -G Composite Mortar. CAUTION: The edges of the insulation board must be free from adhesive. When pressing the boards, remove any adhesive extruding from the side before laying the next board to make sure an open joint does not occur. 5.33 FIXING OF INSULATION SLABS Supply and insert through the insulation slabs and into the structure mechanical fixings of type TID 8/60 ensuring minimum 35mm embedment in the sequence and pattern as advised by Envirowall Limited. Outer face of all slabs to be flat and in plane. 5.34 Additional fixings at 300mm centres to be fixed either side of building corners and around all wall openings. The distance of the fixings from the face of the insulation at corners of the building and wall openings should include the thickness of the insulation board plus 75mm from the corner of the existing background. 5.35 The fixing must be driven into the background until the head sits flush with the surface of the insulation. Pull out tests should be carried out prior to the use of these fixings to ensure they give adequate retention. 5.36 SEALING PROFILE Supply and apply Envirowall Sealing Profile (Ref: 8585) where system abuts window and door frames and embed the mesh strip in Granol-G on insulation to reveals. Remove self-adhesive tape and apply lightweight polythene protection to window and door openings. 5.37 FORMING OF WALL SYSTEM JOINTS Movement joints should be formed in the Granol system over existing movement joints in the background and where dissimilar background materials abut each other. No additional joints are required for the integrity of the system. Day joints may be required for practical reasons and the positioning of these joints should be agreed between the contractor the architect and Envirowall prior to the commencement of the works. 5.38 CORNER BEAD TO EXTERNAL BUILDING CORNERS Supply and fix meshed stainless steel corner bead to all window/ door heads and jambs.
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5.39 SCRIM REINFORCEMENT TO ALL WALL OPENINGS Prior to the application of the main scrim reinforcement, bed on Granol-G Composite Mortar 300 x 500mm minimum pieces of scrim diagonally across corners of all wall openings and cover with Granol-G composite mortar and leave flat to receive finish render. 5.40 REINFORCING MORTAR Apply Granol G (as specified in section 1.1) to the sound substrate using a stainless steel trowel. Comb through with a 10x6tooth trowel to achieve a consistent depth of base-coat. Float specified reinforcing mesh into the top of the base-coat render, ensuring a minimum horizontal and vertical overlap of 100mm for the glass mesh. All corners at openings must be additionally reinforced with 250 x 250mm mesh strips embedded diagonally into the wet base-coat render. Leave base-coat render to completely set for at least 2 to 3 days before applying Granol Acrylic or Silicone topcoat finishes. 5.41 SURFACE PREPARATION The Granol-G must be allowed to dry and shrink for approximately 2 days in good drying conditions prior to applying the chosen Granol Acrylic or Silicone finish. Granol-G must be flat, clean, and dry and free from dust, grease, chalking or anything else likely to prevent a good bond, prior to applying the Granol Acrylic or Silicone finish. 5.42 SURFACE FINISH JOINTS Areas or panels in different colours are set out prior to applying the finish using Masking Tape 5.43 ACRYLIC OR SILICONE RENDER FINISH Supply and apply a thick coat of Granol primer with brush or lambs wool roller (diluted up to 10% with water) in the colour shade of the topcoat. 5.44 Supply and apply strictly in accordance with the manufacturers printed instructions, Granol Acrylic or Silicone render grained finish to approved colour. Granol Acrylic or Silicone is ready to use after stirring briefly. A small amount of water may be added (max. 2%) if required, due to the substrate or the climatic conditions. 5.45 Apply the Granol Acrylic or Silicone with a stainless steel smoothing trowel in the thickness of the grain and rub with a plastic float in a circular motion. Granol Silicone or Acrylic can also be applied with a suitable conveying pump with spraying equipment. Granol Silicone or Acrylic dries naturally by water evaporation; the drying time may be increased in high air humidity and/or low temperatures. 5.45 CLEANING Wipe clean at each work stage all exposed nosing, movement joints, sills etc 6.0 Drawings 6.1 This scope of works should be read in conjunction with the contract drawings. [Scope of work ends].
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