The mandatory requirement for the thermal efficiency of buildings, is set out in “The Building Regulations Approved Documents” - Part L for England and Wales, Part F in Northern Ireland and in Section 6 of the SBSA Technical Handbooks for Scotland. To help ensure that the requirements of these documents are met.


The SarnaTherm range encompasses products suitable for use in adhered, mechanically fastened, loose laid ballasted and SarnaVert green roofing applications that have been tested for compatibility with other Sarnafil roofing components (critical in adhered applications). They meet a wide variety of fire resistance, acoustic and design requirements.


Sika Limited's unique Sarnafil Branded Product Supply Agreements, with the industry's major thermal insulation manufacturers, ensures that specifying SarnaTherm provides the peace of mind of guaranteed product compatibility, without the risk of splitting the roofing system guarantee liability between the primary waterproofing and the thermal insulation manufacturers.

SarnaTherm G

The SarnaTherm PIR range of rigid thermal insulants are CFC and HCFC closed cell rigid polyisocyanurate insulants, manufactured for Sika Ltd to BS EN 13165 “Thermal Insulation products for buildings - factory made rigid polyurethane foam (PUR)”. Produced by a chemical reaction, during which a blowing agent is added causing the foam to rise between two facings, to which it autohesively bonds, producing a finished product when cooled.


The use of SarnaTherm insulation ensures that the insulation is also covered under the Sarnafil product guarantee.


Product Data Sheet

SarnaTherm G


Declaration of Performance

SarnaTherm G

SarnaTherm S

SarnaTherm S is a rigid insulation board, faced on both sides with an aluminium composite foil, autohesively bonded to the insulation core during the manfacturing process. The core of SarnaTherm S is a high performance CFC/HCFC - free rigid urethane insulant with a typical density of 32 kg/m³.


Product Data Sheet

SarnaTherm S


Declaration of Performance

SarnaTherm S

SarnaTherm XPS

SarnaTherm XPS is a polystyrene CFC and HCFC free cellular plastic insulant, extruded to create a rigid closed cell structure. Manufactured for Sika Ltd to BS EN 13164 “Thermal Insulation products for buildings - factory made extruded polystyrene foam (XPS)”.


SarnaTherm XPS is an unfaced extruded polystyrene thermal insulant, suitable for use in mechanically fastened, adhered, warm ballasted, inverted ballasted and SarnaVert green roofing systems.


Sarnatherm XPS is available in unform boards or tapered (cut-to-falls) schemes.


The use of SarnaTherm insulation ensures that the insulation is also covered under the Sarnafil product guarantee.


Product Data Sheet

SarnaTherm XPS


Declaration of Performance

SarnaTherm XPS

SarnaTherm InsulDeck

SarnaTherm InsulDeck is a composite deck comprising of 6 or 9mm thick plywood upper facing to BS EN 636, bonded to a (PIR) rigid urethane foam core with a lower facing of low emissivity composite foil to the underside, which is highly resistant to the transmission of water vapour.


The use of SarnaTherm insulation ensures that the insulation is also covered under the Sarnafil product guarantee.


Product Data Sheet

SarnaTherm InsulDeck