How To Fit Insulation Between Roof Rafters

Measure the space between the rafters where the insulation will be placed and cut the insulation boards marginally wider than the space to ensure a friction fit upon installation.

How to fit insulation between roof rafters.

Again make sure you select the right thickness of the material so you fill as much of the rafter gap as possible. Unwrap a roll of batting and cut pieces long enough to reach from the soffits to the top of each rafter bay. For rolled insulation place it between roof rafters. Using rigid boards as opposed to wool is a much more precise.

For a ventilated roof fix battens on the inside of the rafters 50mm from the underlay to leave vented air spaces. When they are cut ensure there is a. I want to insulate my roof deck soffit ridge vents from the attic there is currently no insulation there. 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.

Replace the floorboards and then spray more insulation on top of it. Isover glass mineral wool gmw is another option for the between rafter insulation as a roll or batt. Where the insulation does not fill the total rafter depth the low emissivity foil facings can gain additional thermal benefit from the air spaces they face into. If you have a solid floor covering the roof rafters use the claw end of a hammer to pull the floor up in several locations and blow the insulation under the boards.

A utility knife cuts through insulation well. Time to get the insulation finished and get this place warm. Alternatively using a thermal laminate featuring rigid pir insulation pre bonded to a plasterboard means fitting the insulation and ceiling lining in one operation reducing storage cutting and fixing. 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.

Your rigid boards will need to be cut to fit the gaps between the rafters. Check out our how to video at the link below. I don t want to mess with baffles batts because distances between the rafters vary and there are some more rafters added someone messed up the framing so baffles wouldn t work.