How To Insulate Loft Roof Rafters

With a warm roof the usual process is to split the insulation into two layers.

How to insulate loft roof rafters. Install the insulation. 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. 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.

See how to calculate the desired width of loft roll insulation for appropriate width sizes. Take a measuring device tape measure or a laser measure and measure the rafter area this can be done by measuring. Https youtu be w4mkphzmqxw contact us restorat. Cut any larger width rolls 1140mm to the desired width dependent on your joist s spacing.

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. Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place. Take into consideration the thickness you want to insulate it is recommended you insulate to at least 100mm to get the. How do you fix insulation between loft rafters.

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. When measuring your loft space here is a simple guide. Time to get the insulation finished and get this place warm. If your attic is going to be converted into livable space then you will need to insulate the roof rafters.

Isover glass mineral wool gmw is another option for the between rafter insulation as a roll or batt. We used kingspan thermapitch tp10 zero odp. 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.