About Rigid Foam

Heat loss from a house or building occurs in almost every directions. The picture below shows the typical heat losses from a house through the various parts. Loft insulation & cavity wall insulation are simple and efficient ways to prevent heat loss through a roofs and walls. Energy savings could amount to as much as 40% depending on the type of insulation and the thickness.

Insulation in loft spaces either at ceiling level or at rafter level will greatly improve the level of comfort in a house and significantly reduce heating costs. Where the insulation is installed between the rafters, this can create a living space in the loft or a "room in a roof"

We all know that heat rises and thus tends to accumulate in the upper floors or lofts. Ordinary plaster board ceilings are poor insulators, and heat is lost through the ceiling and roof.

The formation of condensation on internal surfaces in cool weather is a very good indication of just how much heat is being lost through a lack of adequate insulation. What makes a good insulator? In simple terms, the insulating ability of a product is dependant on two main factors; the thickness of the insulation, and it's inherent ability to insulate (k-value). Generally, the thicker the insulation the better and the lower the k-value the better. These 2 factors are more often combined and referred to as the U-value. The lower the U-value, the better the insulation.

The UK building regulations have undergone several revisions over the past few years, with a particular focus on reducing the U-values in buildings through better insulation.

View a PDF of technical data

Spray foam insulation is ideal for roofs suffering from nail fatigue and tile slippage. "Nail fatigue" is the corrosion of the nails, which hold slates in place. Over time these nails corrode and the result is that there is nothing to hold the tile in place. Spray foam is widely used to stabilise tiles and slates in a cost effective manner and thus avoid a costly re-roofing. The foam is sprayed onto the underside of the tiles and battens where it bonds strongly, creating a water-proof and very stable structure, that will prevent the ingress of wind driven rain and snow.

Class 1 Foam details

Loft conversions and new builds

Spray foam insulation can be applied between the roof rafters to insulate the roof in newly converted lofts, or to insulate roofs in new builds. A 50mm air gap does not need to be left between the insulation and the tiles.

The concept of spray insulation extends to insulating conventional brick walls, and can be applied to internal surfaces (which can then be rendered with plaster or faced with plasterboard). This makes sprayed insulation ideal for insulating cellars and basements. The advantages are: fast, efficient application of insulation; good sound deadening properties & excellent damp proofing properties.