Knauf Insulation - the UK's leading manufacturer of glass and rock mineral wool, extruded polystyrene (XPS) and extruded polyethylene (XPE) insulation – is the only insulation manufacturer to be awarded Energy Savings Trust recommended status on its Polyfoam Supadeck, which has been specifically designed to combine thermal insulation and decking for storage in pitched roof loft spaces.
Traditionally, Crown Loft Roll is used to insulate loft spaces, however some people prefer to partially board their lofts to create more storage space. Polyfoam Supadeck provides the perfect easy-to-install solution. It is a two-in-one high performance XPS rigid board insulation which is 100% ozone friendly and designed to achieve the Building Regulations requirement for 0.16W/m2K U-Value in loft insulation applications. What’s more, it allows homeowners to board their loft without a loss of insulation performance.
The thermal resistance of two layers of board is 3.60m2K/W (equivalent of 160mm of glass mineral wool as supplied to the retail market). When used in conjunction with a chipboard facing, the two layer solution is the equivalent of the current recommendation for 170mm of glass mineral wool to be laid above ceiling joists.
Mark Thompson, Polyfoam product manager at Knauf Insulation, said: “There are more than 20 million homes in the UK of which a large percentage have inadequate loft insulation. Various informal surveys of householders, unsurprisingly, reveal that they are not prepared to sacrifice storage space to top up their mineral wool loft insulation.
“Polyfoam Supadeck provides a unique solution that allows householders to upgrade their insulation whilst retaining their existing chipboard loft storage deck. It is probable that up to 10% additional energy saving associated with heat loss through the attics of existing houses will be achieved.”