How To Fit Insulation Between Roof Rafters

Isover glass mineral wool gmw is another option for the between rafter insulation as a roll or batt.

How to fit insulation between roof rafters.

For a ventilated roof fix battens on the inside of the rafters 50mm from the underlay to leave vented air spaces. 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. Unwrap a roll of batting and cut pieces long enough to reach from the soffits to the top of each rafter bay. Again make sure you select the right thickness of the material so you fill as much of the rafter gap as possible.

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. 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. 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. 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 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. A utility knife cuts through insulation well. Check out our how to video at the link below. Time to get the insulation finished and get this place warm.

Https youtu be w4mkphzmqxw contact us restorat. 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. Your rigid boards will need to be cut to fit the gaps between the rafters.

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. Using rigid boards as opposed to wool is a much more precise. Replace the floorboards and then spray more insulation on top of it.