SIPS Specifications

Standard Details

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External Cladding - Wslls

As soon as possible after Kingspan TEK® by SBUK SIP panels walls have been erected, a breathable membrane, e.g. TF200, should be fixed directly to the panels. External cladding should be installed over the breathable membrane.

The following are examples of external cladding for walls:

Thermal Properties

U–values (W/m2.K) for Kingspan TEK® Building System Walls with Various Thicknesses of Additional Insulation and Different Breathable Membranes.
The λ–values and R–values detailed below are quoted in accordance with BS EN 13165: 2008

Thermal Conductivity

Thermal conductivity (λ–value) of the OSB/3 component of Kingspan TEK® by SBUK SIP panels should be taken as 0.13 W/m.K. The thermal conductivity of the insulation core of Kingspan TEK® by SBUK SIP panels is 0.023 W/m.K.

Thermal Resistance

Kingspan TEK® by SBUK SIP panels have a thermal resistance (R–value) of 5.100 m2.K/W (142 mm thick panels) or 6.405 m2.K/W (172 mm thick panels). It is calculated by dividing the thickness of each component by its thermal conductivity and adding the resultant figures together. The resulting number is rounded down to the nearest 0.05 (m2.K/W).


In addition to the excellent U–values that can be achieved by walls and roofs constructed using the, Kingspan TEK® by SBUK SIP panels the closed cell structure of the rigid urethane insulation core of the panels does not allow movement of air within them.

The insulation will not sag or physically deteriorate over time, as may be the case with other insulating materials.

Air leakage levels can be as good as 0.08 air changes per hour at normal pressures (approximately 1 m3/hour/m2 at 50 Pa). Standard results would be 3 air changes per hour. This is subject to the quality of the overall build.

The Facings

Kingspan TEK® by SBUK SIP panels are faced on both sides with a maximum of 15 mm OSB/3, autohesively bonded to the rigid thermoset urethane insulation core during manufacture.

This allows for a substantially greater pull out strength by upto 50% than a comparable 11mm OSB board.

(Autohesion is the spontaneous boding or adherence between two unvulcanised surfaces of an elastomer).

The Core

The core of Kingspan TEK® by SBUK SIP panels are high

performance fibre–free, thermoset, 112 or 142 mm thick rigid urethane insulant of typical density 33 kg/m3, manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP).

Structural Dimensions

Kingspan TEK® by SBUK SIP panels are available in the following standard size(s):


Water Vapour Resistance

The insulation core of Kingspan TEK® by SBUK SIP panels typically achieve a resistance of 33.6 MN.s/g, when tested in accordance with BS EN 12086: 1997 / I.S. EN 12086: 1998 (Thermal insulating products for building applications. Determination of water vapour transmission properties).

The OSB/3 facing typically achieves 7.5 MN.s/g.


The BBA certificate and our BOPAS accreditation both say the system is good for a Minimum of 60 years!!!

Resistance to Solvents, Fungai and Rodents

The rigid urethane insulation core is resistant to dilute acids, alkalis, mineral oil and petrol. It is not resistant to some solvent–based adhesive systems, particularly those containing methyl ethyl ketone.

Adhesives containing such solvents should not be used in association with Kingspan TEK® by SBUK Building System.

Kingspan TEK® Building System components, which have been in contact with harsh solvents, petrol, mineral oil or acids, or components that have been damaged in any way should not be used.

The rigid urethane insulation core and facings used in the manufacture of Kingspan TEK® by SBUK SIP panels resist attack by mould and microbial growth and do not provide any food value to vermin.

Strength & Stability

The permissible vertical load resistance for Kingspan TEK® by SBUK SIP panels is sufficient for the System’s use as loadbearing partitions, separating walls, the inner leaf of external walls and pitched roofs in dwellings up to four storeys high.

Resistance to Airborne Sound

Field tests to BS EN ISO 140–4: 1998 (Field measurements of airborne sound insulation between rooms) on separating walls, externally faced with 12.5 mm plasterboard, 19 mm gypsum planks and 9.5 mm plasterboard to each Kingspan TEK® Building System wall panel, achieved an average sound

reduction of 58 dB (DnT,w (C;Ctr) 58 (–3; –7) dB).

A laboratory test on a single wall panel with no internal dry–lining achieved a sound reduction (Rw) of 31 dB.

Fire Performance

The Kingspan TEK® by SBUK Building System in the construction specified in the table below, when subjected to BS EN 1365-1: 2012 (Fire resistance tests for loadbearing elements. Walls), has achieved the result shown
NB: The result shown can also be applied to the Kingspan TEK® Building System in a 172 mm thickness