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SIPs Self-Build House Kits​
Designed
Manufactured
Delivered
Erected
Nationwide
07577 791 936
Wall U-Value Calculations
Wall Type 1 - Description:
102mm brick, 60mm cavity, reflective membrane, SIP at specified thickness, reflective Vapour Control Layer (VCL), 25mm Service void, 12.5mm plasterboard
U-Value
​
0.12W/m²K
​
0.13W/m²K
​
0.15W/m²K
​
0.17W/m²K
​
0.19W/m²K
U-Value Calculation
SIP Thickness
​
219mm
​
194mm
​
169mm
​
144mm
​
119mm
Total Wall Thickness
​
419mm
​
394mm
​
366mm
​
344mm
​
319mm
Condensation
Calculation
Wall Type 2 - Description:
5mm smooth render, 12mm Magnesiun Oxide Board (MgO), non reflective breather membrane, SIP at specified thickness, reflective VCL, 25mm service void, 12.5mm plasterboard
SIP Thickness
​
219mm
​
194mm
​
169mm
​
144mm
​
119mm
U-Value
​
0.13W/m²K
​
0.15W/m²K
​
0.17W/m²K
​
0.19W/m²K
​
0.23W/m²K
U-Value Calculation
Total Wall Thickness
​
271mm
​
246mm
​
221mm
​
196mm
​
171mm
Condensation Calculation
Wall Type 3 - Description:
18mm timber cladding, 50mm cavity, reflective membrane, SIP at specified thickness, reflective VCL, 25mm Service void, 12.5mm plasterboard
Total Wall Thickness
​
325mm
​
300mm
​
272mm
​
250mm
​
225mm
U-Value
​
0.13W/m²K
​
0.15W/m²K
​
0.17W/m²K
​
0.19W/m²K
​
0.23W/m²K
U-Value Calculation
SIP Thickness
​
219mm
​
194mm
​
169mm
​
144mm
​
119mm
Condensation
Calculation
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