INSULATION AND BUILDING REGULATIONS
ENGLAND & WALES
Work in progress
Insulation and building regulationsEngland Superfoil Pitched Roof (internal) 1 Superfoil Pitched Roof (both) 2 Superfoil Flat Roof (internal) 3 Superfoil Flat Roof (external, PIR sandwich) 4 Actis Pitched Roof - refurb options - 0.15 5 Actis Pitched Roof 0.13 6 Pitched Roof 0.16 7 Cold Flat Roof 0.16 8 Insulation for Pitched Extension 0.15 9 Insulation for Pitched Roof Renovation 0.16 11 Insulation for Flat Extension 0.15 13 Insulation for Flat Renovation 0.16 Insulation for Cold Flat Roof Renovation 0.16 Ecotherm U-Value Calculator and Condensation Risk Assessment - nonventilated 0.15 14 Ecotherm U-Value Calculator and Condensation Risk Assessment - ventilated 0.15 17 Ecotherm U-Value Calculator and Condensation Risk Assessmentnon-ventilated 0.16 20 Ecotherm U-Value Calculator and Condensation Risk Assessment - ventilated 0.15 23
INDEX
INSULATION AND BUILDING REGULATIONS
ENGLAND
Pitched Roof (Internal)
This solution would add about a depth from rafters of about 55mm including 12.5mm plasterboard. This solution presumes minimum 200mm rafter depth at 400 c/c and breathable membrane. U-Value 0.13
Tiles
Tile Battens
Breathable Membrane
25mm Rafter Cavity
100mm PIR between Rafters
25mm Rafter Cavity
SuperFOIL SF19+
38mm Battens
Internal Finish
Tiles
Tile Battens
Breathable Membrane
25mm Rafter Cavity
110mm PIR between Rafters
25mm Rafter Cavity
SuperFOIL SF19+
38mm Battens
Internal Finish
U-Value 0.16
Tiles
Tile Battens
Breathable Membrane
25mm Rafter Cavity
100mm PIR between Rafters
25mm Rafter Cavity
SuperFOIL SF19+
38mm Battens
Internal Finish
This solution would add about a depth from rafters of about 55mm including 12.5mm plasterboard. This solution presumes minimum
160mm rafter depth at 400 c/c and breathable membrane.
This solution would add about a depth from rafters of about 55mm including 12.5mm plasterboard. This solution presumes minimum
150mm rafter depth at 400 c/c and breathable membrane.
U-Value 0.15
1
Pitched
Tiles
Battens
25mm Vertical Battens
SuperFOIL SF19BB
50mm Rafter Cavity
90mm PIR between Rafters
30mm Rafter Cavity
SuperFOIL SF40
38mm Battens
Internal Finish
Tiles
Battens
25mm Vertical Battens
SuperFOIL SF19BB
50mm Rafter Cavity
60mm PIR between Rafters
30mm Rafter Cavity
SuperFOIL SF40
38mm Battens
Internal Finish
Tiles
Battens
25mm Vertical Battens
SuperFOIL SF19BB
50mm Rafter Cavity
50mm PIR between Rafters
30mm Rafter Cavity
SuperFOIL SF40
38mm Battens
Internal Finish
This solution will add a height above the rafters of about 30mm plus the tile battens and tiles, and a depth below of about 55mm including a 12.5mm plasterboard. This solution presumes minimum
170mm rafter depth at 400 c/c.
This solution will add a height above the rafters of about 30mm plus the tile battens and tiles, and a depth below of about 55mm including a 12.5mm plasterboard. This solution presumes minimum
140mm rafter depth at 400 c/c.
This solution will add a height above the rafters of about 30mm plus the tile battens and tiles, and a depth below of about 55mm including a 12.5mm plasterboard. This solution presumes minimum
130mm rafter depth at 400 c/c.
U-Value 0.15 U-Value 0.16 2
Roof (both) U-Value 0.13
External Finish
Boarding
50mm Joist Cavity - Ventilated
120mm PIR Between Joists
25mm Joist Cavity
SuperFOIL SF19+
38mm Battens
Internal Finish
This solution will add a depth below the rafters of about 55mm including 12.5mm plasterboard. This solution presumes minimum 195mm rafter depth at 400 c/c.
U-Value 0.16 3
Flat Roof (Internal)
Flat Roof (external, PIR sandwich)
External finish
Boarding
100mm PIR
Boarding
25mm Firrings
SuperFOIL SF19+
50mm Joists
Internal Finish
External Finish
Boarding
80mm PIR
Boarding
25mm Firrings
SuperFOIL SF19+
50mm Joists
Internal Finish
External Finish
Boarding
75mm PIR
Boarding
25mm Firrings
SuperFOIL SF19+
50mm Joists
Internal Finish
This solution will add a height above the joists of about 130mm plus the boarding. This solution presumes a joist depth of 50mm at 400 c/c.
This solution will add a height above the joists of about 110mm plus the boarding. This solution presumes a joist depth of 50mm at 400 c/c.
This solution will add a height above the joists of about 105mm plus the boarding. This solution presumes a joist depth of 50mm at 400 c/c.
U-Value 0.13 U-Value 0.15 U-Value 0.16 4
OPTION 1: Roof Build-Up (Hybris + HControl)
Slate Batten
Breather Felt
140mm Hybris between 175mm Rafter
HControl stapled and taped to underside of rafter
38mm Counter Batten
Plasterboard
*Above spec to achieve 0.15 U-Value
OPTION 2: Roof Build-Up (Boost’R Hybrid + Hybris + HControl)
*Above spec to achieve 0.15 U-Value
Slate
Batten
Counter Batten
Boost’R Hybrid ROOF
90mm Hybris between 150mm Rafter
HControl stapled and taped to underside of rafter
38mm Counter Batten
Plasterboard
OPTION 3: Roof Build-Up (Hybris + PIR Board)
Tile/ Slate
Batten
Breather Felt
125mm Hybris between 150mm
Rafter
60mm PIR to underside of rafter
VCL
Plasterboard
*Above spec to achieve 0.15 U-Value
Pitched Roof - Refurb Options to achieve 0.15 U-Value
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Pitched Roof to achieve 0.13 U-Value
OPTION 1: Roof Build-Up (Hybris + HControl)
*Above spec to achieve 0.13 U-Value
Slate Batten
Breather Felt
170mm Hybris between 225mm Rafter
HControl stapled and taped to underside of rafter
38mm Counter Batten
Plasterboard
OPTION 2: Roof Build-Up (Boost’R Hybrid + Hybris + HControl)
Slate
Batten
Counter Batten
Boost’R Hybrid ROOF
140mm Hybris between 250mm Rafter
HControl stapled and taped to underside of rafter
38mm Counter Batten
Plasterboard
*Above spec to achieve 0.13 U-Value
OPTION 3: Roof Build-Up (Hybris + PIR Board)
Tile/ Slate
*Above spec to achieve 0.13 U-Value
Batten
Breather Felt
170mm Hybris between 200mm
Rafter
60mm PIR to underside of rafter
VCL
Plasterboard
6
EOLIS HC + PIR
Tile
Batten
Compliant with Sarking/Bitchumen/ Non Breather Felt/Breather Felt
No Cross Ventilation Required
EOLIS HC stapled to underside of 100mm Rafter @ 400c
50mm Counter Batten
60mm PIR VCL
*Please see PF383 attached to confirm 0.16 U-Value
7
Plasterboard Pitched Roof New Product (For Refurb Market) EOLIS HC 135mm to achieve 0.16 U-Value
Cold Flat Roof to achieve 0.16 U-Value
OPTION 1: Cold Flat Roof Build-Up (Hybris + HControl)
GRP External Finish
18mm Stirling Board
50mm Firrings Minimum
50mm Cross Ventilation
155mm Hybris between 175200mm Joist
HControl stapled and taped to underside of joist
38mm Counter Batten
Plasterboard
OPTION 2: Cold Flat Roof Build-Up (Hybris + PIR)
GRP/EPDM External Finish
18mm Stirling Board
50mm Firrings Minimum
50mm Cross Ventilation
155mm Hybris within 200mm Joist
50mm PIR fixed to underside of joist
VCL
Plasterboard
*Please see PF383 attached to confirm 0.16 U-Value
8
Insulation needed for Pitched Extension U-Value 0.15
Note – with PIR (Foil board) a VCL is needed between the plasterboard and insulation to reduce condensation
OPTION 1
OPTION 2
U-Value Ventilation/ Insulation Between Under Comments 0.15 Ventilated 100mm Foil Board 70mm 0.15 Non-Ventilated 120mm Foil Board 50mm 0.15 SuperFOIL 110mm Foil Board* SF19+ *Adds a depth from rafters of about 55mm including 12.5mm plasterboard (assuming 160mm rafter depth)
U-Value Ventilation/ Insulation Above Between Under Comments 0.15 SuperFOIL SF19BB 60mm Foil Board SF40* * Adds a depth from rafters of about 55mm including 12.5mm plasterboard (assuming 140mm rafter depth) 0.15 Actis 140mm Hybris H Control (stapled to underside)
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Insulation needed for Pitched Renovation
U-Value 0.16
Note – with PIR (Foil board) a VCL is needed between the plasterboard and insulation to reduce condensation OPTION 1 OPTION 2
U-Value Ventilation/ Insulation Between Under Comments 0.16 Ventilated 100mm Foil Board 60mm 0.16 Non-Ventilated 120mm Foil Board 40mm 0.16 Actis 140mm Hybris H Control (stapled to underside)* *Assuming 175mm rafter and 400mm centres U-Value Ventilation/ Insulation Between Under Comments 0.16 Actis 125mm Hybris 60mm Foil Board assuming 150mm rafter and 400mm centres
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OPTION 3
If a renovation and you only have 100mm rafter depth
OPTION 4
U-Value Ventilation/ Insulation Between Under Comments 0.16 Eolis HC (stapled to the underside) 0.16 TLX TLX Gold counter battened with 20mm unventilated air cavity then 150mm foil board 150mm foil board between (400mm centres) or 130mm foil board between (600mm centres) 0.16 SuperFOIL 100mm Foil Board SF19+w Add a depth from rafters of about 55mm including 12.5mm plasterboard (assuming 150mm rafter depth)
U-Value Ventilation/ Insulation Above Between Under Comments 0.16 SuperFOIL SF19BB 50mm Foil Board SF40 Adds a depth from rafters of about 55mm including 12.5mm plasterboard (assuming 130mm rafter depth) 12
U-Value Ventilation/ Insulation Materials Needed Comments 0.15 Timber or Concrete Deck 150mm Torch or Tissue Board 0.15 SuperFOIL 80mm Torch or Tissue Board and SF19+ Adds a height above the joists of about 110mm plus the boarding 0.16 Timber or Concrete Deck 140mm Torch or Tissue Board 0.16 SuperFOIL 75mm Torch or Tissue Board and SF19+ Adds a height above the joists of about 105mm plus the boarding U-Value Ventilation/ Insulation Between Under 0.16 Actis 155mm Hybris between 175mm – 200mm joists H Control (stapled to the underside) U-Value Ventilation/ Insulation Between Under 0.16 Actis 155mm Hybris between 200mm joists 50mm Foil Board (to underside of the joists) Insulation needed for Flat Extension U-Value 0.15 and Flat Renovation U-Value 0.16 Insulation needed for Cold Flat Roof Renovation U-Value 0.16 OPTION 1 OPTION 2 13
Non Ventilated U-Value 0.15 14
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Ventilated U-Value 0.15 17
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Non Ventilated U-Value 0.16 20
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Ventilated U-Value 0.16 23
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INSULATION AND BUILDING REGULATIONS WALES
Note – with PIR (Foil board) a VCL is needed between the plasterboard and insulation to reduce condensation
U-Value Ventilation/ Insulation Between Under Comments 0.13 Ventilated 100mm Foil Board 90mm Foil Board 0.13 Non-Ventilated 120mm Foil Board 70mm 0.13 SuperFOIL 100mm Foil Board (between rafters) SF19+ Adds a depth from rafters of about 55mm including 12.5mm plasterboard (assuming 160mm rafter depth) U-Value Ventilation/ Insulation Above Between Under Comments 0.13 SuperFOIL SF19BB 90mm Foil Board SF40 Adds a depth from rafters of about 55mm including 12.5mm plasterboard (assuming 170mm rafter depth) 0.13 Actis 170mm Hybris H Control (stapled to underside)
OPTION 1 OPTION 2
0.13
Insulation needed for Pitched Extension and Pitched Renovation U-Value
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U-Value Ventilation/ Insulation Between Under 0.13 Actis Boost R Hybrid Roof 140mm Hybris H Control (stapled to the underside) U-Value Ventilation/ Insulation Between Under 0.13 Actis 170mm Hybris 60mm Foil Board U-Value Ventilation/ Insulation Materials Needed Comments 0.13 Timber or Concrete Deck 80mm and 100mm Torch or Tissue Board 0.13 SuperFOIL 10mm Torch or Tissue Board and SF19+ This solution would add a height of about INFO NOT SUPPLIED OPTION 4 OPTION 3 Insulation needed for Flat Extension and Flat Renovation U-Value 0.13 28
Non-Ventilated U-Value 0.13 29
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