SIPs U-Values 

Below is a selection of U-Value calculations for different thicknesses of Sips Eco Panels used in a roof and wall constructions.  NB - because the SIP panel provides the bulk of the insulation, altering the roofing finish does not drastically affect the U-Value.  All dimensions are nominal and within a tolerance of +/-3mm    

Wall Type 1 = 102.5mm brick, 60mm cavity, breathable reflective membrane, SIP wall panel at specified thickness, vapour membrane, 25mm service batten, 12.5mm plasterboard, 3mm skim 
 
Wall Type 2 = 5mm render, 12mm MGO panel exterior, breathable membrane, SIP wall panel at specified thickness, 25mm service battens, 12.5mm vapour check plasterboard, 3mm skim. 
 
Wall Type 3 = 18mm Timber cladding, 50mm ventilated cavity, reflective breathable membrane, SIP wall panel at specified thickness, 25mm service batten, 12.5mm vapour check plasterboard, 3mm skim. 
 
Roof Type 1 = Standard clay tiles, 25mm tiling batten, 25mm counter batten, breathable roofing membrane, SIP roof panel at specified thickness, 25mm service void, vapour check plasterboard, 3mm skim. 
 
Roof Type 2 = Standard clay tiles, 25mm tiling batten, 25mm counter batten, breathable roofing membrane, SIP roof panel at specified thickness, 25mm service void, 50mm Thermaline super, 3mm skim. 
Thickness: (mm) 
119 
144 
169 
194 
219 
Internal & External OSB Thickness; (mm) 
11 
11 
11 
11 
11 
Foam Core Thickness: (mm) 
97 
122 
144. 
172 
197 
Weight: (kg/m2) 
15.3 
16.3 
17.4 
18.4 
19.4 
U-Value as Wall Type 1: (W/m2) 
0.21 
0.18 
0.16 
0.14 
0.13 
U-Value as Wall Type 2: (W/m2) 
0.26 
0.21 
0.18 
0.16 
0.14 
U-Value as Wall Type 3: (W/m2). 
0.23 
0.20 
0.17 
0.15 
0.14 
U-Value as Roof Type 1: (W/m2). 
 
0.22 
0.20 
0.18 
0.16 
U-Value as Roof Type 2: (W/m2) 
 
0.16 
0.14 
0.12 
0.10 
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