Insulation Between Rafters And Above Attic

Insulating a pitched roof above and between the rafters.

Insulation between rafters and above attic.

Roof insulation refers to the practice of installing insulation on the roof slope both above and below the rafters. Hire a pro to install spray foam insulation. You can use rigid foam panels or do as tom silva does with nearly all houses these days. This limits the maximum thickness of the insulation between the rafters to between 50mm and 175mm.

Ceiling insulation refers to any type of insulation installed within the floor nearest to the roof structure of the home. In finished attic rooms with or without dormer insulate 2a between the studs of knee walls 2b between the studs and rafters of exterior walls and roof 2c and ceilings with cold spaces above. The flexible nature of gmw means that the roll or batts can be accurately cut and friction fitted between the rafters thereby minimising air gaps and maximising thermal performance. The will hold open an air gap of approximately 1 inch to allow airflow past a layer of insulation.

You can use either faced or unfaced batting for this installation. If you re considering turning your attic into conditioned storage or living space it s worth changing tactics to insulate between the rafters and wall joists instead of the floor. Attic baffles also known as rafter vents go along the sides of your attic and keep your soffit vents from being blocked by insulation. Cut insulation once you have these in place measure the length of the spaces between your rafters.

When using insulation that has. The ones i ve used are made of styrofoam and iirc they cost around 2. Common rafter depths range from 100mm to 200mm. This generally would not be a sufficient thickness to achieve the u values required to meet building regulations and more insulation would need to be added.

Measure the space between the rafters where the insulation will be placed and cut the insulation boards marginally. Isover glass mineral wool gmw is another option for the between rafter insulation as a roll or batt. Fit the cut quinn therm qr insulation boards tightly between the rafters. Insulating between rafters install batting between the roof rafters for finished attic spaces.