How To Insulate Loft Roof Rafters

If you re laying narrow pre cut rolls 370 380 or 570mm or encapsulated insulation jump to step 2.

How to insulate loft roof rafters.

Time to get the insulation finished and get this place warm. Install the insulation. How do you fix insulation between loft rafters. 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.

Cut any larger width rolls 1140mm to the desired width dependent on your joist s spacing. Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place. Take a measuring device tape measure or a laser measure and measure the rafter area this can be done by measuring. You can use rigid foam panels or do as tom silva does with nearly all houses these days.

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. If your attic is going to be converted into livable space then you will need to insulate the roof rafters. Check out our how to video at the link below. Https youtu be w4mkphzmqxw contact us restorat.

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

When measuring your loft space here is a simple guide. 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. With a warm roof the usual process is to split the insulation into two layers.