Insulating Roofs with Pavatex Wood Fibre Insulation

Externally insulating a roof with sarking boards is very effective because the complete roof structure is covered in insulation and so cold bridges through the rafters are avoided. This type of roof is called a warm roof. This heat retention is very considerable because the rafters typically take up 15 to 20% of the entire roof surface and the heat will escape through these timber elements. Isolair or Pavatherm-Plus wood fibre insulation boards are installed directly on top of the rafters and they must be fixed into place with battens and counter battens. The roof covering, such as tiles are fitted onto the counter battens. It is recommended to place an airtight membrane below the wood fibre for optimum results.