Specifications

Thermal kit Specification

January 2018

Download the Breton Exclusive – Price Guide – Jan 2018 (pdf)

Our 1 star option is the basic specification that is required to comply with national building regulations. Where open panel options are concerned, we would like to highlight that you should allow for additional site labour costs for the fitting of insulation/service void materials.

 

  5* Closed 4* Closed 3* Closed 3* Open 2* Closed 2* Open 1* Open
Ground Floor – by others              
Insulated Concrete Ground Floor
Designed / Supplied by others
             
See Assumed Insulation Thickness 180mm PU 150mm PU 120mm PU 120mm PU 100mm PU 100mm PU 90mm PU
U Value W/m2K (‘below slab) 0.10 0.12 0.15 0.15 0.17 0.17 0.18
               
External Walls              
Breather Membrane Reflective Reflective Reflective Reflective Reflective Reflective Reflective
OBS Sheathing 9mm 9mm 9mm 9mm 9mm 9mm 9mm
Framing 235mm 184mm 140mm 140mm 90mm 140mm 140mm
Insulation 235mm PU 184mm PU 140mm PU 140mm Frametherm 32 90mm PU 140mm Frametherm 40 140mm Frametherm 35
OSB Sheathing 9mm 9mm 9mm Not applicable 9mm Not applicable Not applicable
Vapour Control Layer Reflective Reflective Reflective Polythene Reflective Reflective Not applicable
PU Layer 25mm
Service Void / Battens 35mm 35mm 35mm 35mm 35mm 35mm Not applicable
Plasterboard 15mm TE Plain 15mm TE Plain 15mm TE Plain 15mm TE Plain 15mm TE Plain 15mm TE Plain 15mm TE Vapoursheld
U’ Value W/m2K 0.11 0.13 0.15 0.15 0.21 0.20 0.22
               
Roof -Horizontal Ceiling              
Insulation 560mm Frametherm 35 560mm Frametherm 40 420mm Frametherm 40 420mm Frametherm 40 370mm Frametherm 40 370mm Frametherm 40 280mm Frametherm 40
U’ Value W/m2K 0.07 0.08 0.10 0.10 0.13 0.13 0.15
               
Roof -Coomb/Sloping              
Insulation 200mm PU 170mm PU 170mm PU 170mm PU 140mm PU 140mm PU 140mm PU
Vapour Control Layer Polythene Polythene Polythene Polythene Polythene Polythene Polythene
PU Layer 25 25 25 25 25 25 25
Service Void / Battens 35 35 35 35 35 35 35
Plasterboard 15mm TE Plain 15mm TE Plain 15mm TE Plain 15mm TE Plain 15mm TE Plain 15mm TE Plain 15mm TE Plain
U’ Value W/m2K 0.12 0.13 0.13 0.13 0.15 0.15 0.15
               
Roof – Hanging post              
Insulation 140mm PU 120mm PU 140mm Frametherm 35 140mm Frametherm 35 140mm Frametherm 32 140mm Frametherm 32 140mm Frametherm 40
Vapour control layer Polythene Polythene Polythene Polythene Reflective Reflective Reflective
PU Layer 25 25 25 25
Service Void / Battens 35 35 35 35 35 35 35
Plasterboard 15mm TE Plain 15mm TE Plain 15mm TE Plain 15mm TE Plain 15mm TE Plain 15mm TE Plain 15mm TE Plain
U’ Value W/m2K 0.14 0.15 0.17 0.17 0.20 0.20 0.22
               
External Joinery – W/m2K              
Windows (whole product) 0.90 1.10 1.20 1.20 1.30 1.30 1.30
Roof Lights 1.15 1.30 1.30 1.30 1.50 1.50 1.60
External Doorsets (average product) 1.20 1.20 1.20 1.20 1.40 1.40 1.60