How To Insulate Loft Roof Rafters

How do you fix insulation between loft rafters.

How to insulate loft roof rafters.

Cut any larger width rolls 1140mm to the desired width dependent on your joist s spacing. Time to get the insulation finished and get this place warm. 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. The materials used to insulate under the roof include batts of mineral or glass wool insulation held in place by battens of wood attached to and across the rafters.

See how to calculate the desired width of loft roll insulation for appropriate width sizes. If 180mm is to be installed then 100mm board might be introduced between the rafters there has to be a minimum 25mm air gap between the insulation and the underside of the tiles or slates with an 80mm board running across the rafters. 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. With a warm roof the usual process is to split the insulation into two layers.

When measuring your loft space here is a simple guide. Https youtu be w4mkphzmqxw contact us restorat. If you re laying narrow pre cut rolls 370 380 or 570mm or encapsulated insulation jump to step 2. How to guide measure the space between the rafters before cutting the boards as spacings will vary slightly cut the insulation boards to size using a sharp knife or fin toothed saw.

You can use rigid foam panels or do as tom silva does with nearly all houses these days. Isover glass mineral wool gmw is another option for the between rafter insulation as a roll or batt. Take into consideration the thickness you want to insulate it is recommended you insulate to at least 100mm to get the. Hire a pro to install spray foam insulation.

Take a measuring device tape measure or a laser measure and measure the rafter area this can be done by measuring. We used kingspan thermapitch tp10 zero odp. Check out our how to video at the link below.