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SIPs Technical Data

Timber is traditionally the most widely used building material. It is easy to handle, natural and brings flexibility to design.

Today, many buildings are built with a traditional timber frame structure and this trend is growing as Building Regulations / Standards strive for better thermal performance and the construction industry moves towards faster and lighter methods of construction. Structural Insulated Panel (SIP) technology is the next generation of timber based construction.

In the UK and Ireland, demand for offsite construction methods such as SIPs is growing rapidly. This is being driven by factors such as the availability of on-site skills being at an all time low.

Building Regulations / Standards are demanding much higher levels of energy efficiency. This is challenging many traditional construction systems and, in some instances, forcing people to look at alternative ways of meeting the requirements more economically. Unparalleled energy efficiency combined with high build-speed and the low site wastage make the Kingspan TEK® Building System a very cost effective way of achieving and exceeding the thermal requirements of the Building Regulations / Standards.

Typical Constructions and Indicative U-Values

The U-values in the tables that follow have been calculated, under a management system certified to the BBA Scheme for Assessing the Competency of Persons to Undertake U-value and Condensation Risk Calculations, using the method detailed in BS EN ISO 6946: 2017 / I.S. EN ISO 6946: 2007 (Building components and building elements. Thermal resistance and thermal transmittance. Calculation methods) and using the conventions set out in BR 443 (Conventions for U-value calculations).

The U-values in the tables that follow are valid for the constructions shown in the details immediately above. Unless otherwise stated, the U-values quoted are based on an internal construction comprising a 3 mm plaster skim on 12.5 mm plasterboard fixed to 50 x 25 mm softwood timber battens. The external finishes are as specified in the examples themselves.

NB For calculations which do not feature additional internal insulation, a 4% bridging factor has been assumed for walls and 1% for pitched roofs. The thermal conductivity of the timber has been assumed at 0.12 W/mK.

NB Calculations assume that the use of a foil faced breather membrane yields an airspace thermal resistance of 0.54 m2K/W.

NB For the purposes of these calculations the standard of workmanship has been assumed good and therefore the correction factor for air gaps has been ignored. NB The figures quoted are for guidance only. A detailed U-value calculation together with condensation risk analysis should be completed for each individual project.

NB If your construction is any different to those specified and / or to gain a comprehensive U-value calculation along with a condensation risk analysis of your project please consult the Kingspan Insulation Technical Service Department for assistance (see rear cover for details).

Kingspan TEK® Building System Walls with 102.5 mm Brickwork Outer Leaf
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Illustration of Kingspan TEK Building System Walls with 102.5mm Brickwork Outer Leaf
Figure 1
U-Values for Kingspan TEK® Building System Walls with Various Thicknesses of Additional Insulation and Different Breathable Membranes
Thickness of Kingspan TEK® Building System Panels (mm)Thickness of Kingspan Thermawall® TW55 (mm)Standard Breathable Membrane U-value (W/m2K)Foil Faced Breathable Membrane U-value (W/m2K)
14200.190.18
142200.150.15
142250.150.15
142300.140.14
142400.130.13
142500.130.12
142600.120.12
142700.110.11
142750.110.11
142800.110.10
142900.100.10
17200.160.15
172200.130.13
172250.130.12
172300.120.12
172400.120.11
172500.110.11
172600.110.10
172700.100.10
Kingspan TEK® Building System Walls with 10 mm Polymer Rendered 100 mm Dense Blockwork Outer Leaf
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Illustration of Kingspan TEK Building System Walls with 10 mm Polymer Rendered 100 mm Dense Blockwork Outer Leaf
Figure 2
Kingspan TEK® Building System Walls with 10 mm Polymer Rendered 100 mm Dense Blockwork Outer Leaf
Thickness of Kingspan TEK® Building System Panels (mm)Thickness of Kingspan Thermawall® TW55 (mm)Standard Breathable Membrane U-value (W/m2K)Foil Faced Breathable Membrane U-value (W/m2K)
14200.190.18
142200.150.15
142250.150.14
142300.140.14
142400.130.13
142500.130.12
142600.120.11
142700.110.11
142750.110.11
142800.110.10
142900.100.10
17200.160.15
172200.130.13
172250.130.12
172300.120.12
172400.120.11
172500.110.11
172600.110.10
172700.100.10
Kingspan TEK® Building System Wall Panels with Ventilated Cladding
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Illustration of Kingspan TEK Building System Wall Panels with Ventilated Cladding
Figure 3
Kingspan TEK® Building System Wall Panels with Ventilated Cladding
Thickness of Kingspan TEK® Building System Panels (mm)Thickness of Kingspan Thermawall® TW55 (mm)U-value (W/m2K)
14200.20
142200.16
142250.15
142300.15
142400.14
142500.13
142600.12
142700.12
142750.11
142800.11
142900.11
17200.17
172200.14
172250.13
172300.12
172400.12
172500.11
172600.11
172700.10
Kingspan TEK® Building System Wall Pitched Roofs
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Illustration of Kingspan TEK Building System Wall Pitched Roofs
Figure 4
Kingspan TEK® Building System Wall Pitched Roofs
Thickness of Kingspan TEK® Building System Panels (mm)Thickness of Kingspan Thermapitch® TP10 (mm)U-value (W/m2K)
14200.19
142200.16
142250.15
142300.15
142400.14
142500.13
142600.13
142700.12
142750.11
142800.11
142900.10
17200.16
172200.13
172250.13
172300.12
172400.12
172500.11
172600.11
172700.10