How To Insulate Loft Roof Rafters

Cut any larger width rolls 1140mm to the desired width dependent on your joist s spacing.

How to insulate loft roof rafters.

Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place. Hire a pro to install spray foam insulation. How do you fix insulation between loft 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.

Install the insulation. We used kingspan thermapitch tp10 zero odp. With a warm roof the usual process is to split the insulation into two layers. 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.

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. Isover glass mineral wool gmw is another option for the between rafter insulation as a roll or batt. When measuring your loft space here is a simple guide. If you re laying narrow pre cut rolls 370 380 or 570mm or encapsulated insulation jump to step 2.

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. Take into consideration the thickness you want to insulate it is recommended you insulate to at least 100mm to get the. 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. If your attic is going to be converted into livable space then you will need to insulate the roof rafters.

You can use rigid foam panels or do as tom silva does with nearly all houses these days. Time to get the insulation finished and get this place warm. See how to calculate the desired width of loft roll insulation for appropriate width sizes.