Dormer Attic Insulation

The depth of your rafter will determine what size of insulation should be used and in turn what size of plasterboard slab should be fitted to achieve current building regulations.

Dormer attic insulation. Knee walls are found in many older houses where the ceiling on the top floor is an attic or there is a dormer window. According to the oak ridge national labratory the open joist ends below the knee wall should be sealed with rigid foam high density cellulose or batt insulation. Fiberglass batts are the worst possible insulation to use in rafter bays because of all insulation types fiberglass is the most permeable to air. Dormer roofs are roofs that contain rooms and can present considerable challenges when it.

1 the first method is to use rigid insulation. There are a number of options for insulating a new dormer roof. In an existing dormer or 1 5 storey home icynene spray foam insulation can be easily fitted to the difficult to insulate areas such as crawl spaces and closed sloping attic sections using our unique cannon tip application method and in areas totally inaccessible icynene can be injected through the plasterboard. Do dormer bungalows and houses with attics in the roof space need a different approach to insulation.