How To Insulate Dormer Roof

Insulating the roof walls of a dormer chalet style house.

How to insulate dormer roof. This video shows the correct way to install a warm deck roof in a loft dormer it s a fast and highly effective method for insulating the space while allow. With a warm roof the usual process is to split the insulation into two layers. The rigid insulation method requires the utilisation of 150mm thick insulation in between the rafters along with a 50mm air gap in order to avert cold bridging. Hold the cut insulation against the dormer walls with the paper side facing the attic or room and the fibreglass facing the exterior wall.

To insulate an existing dormer we outline three of the more common methods below. 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. The first method is to use rigid insulation. 1 the first method is to use rigid insulation.

I have a 4 bedroom waites dormer chalet style house think of a very large bungalow with 2 bedrooms and a bathroom built into the roof. 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. These rooms are very cold the walls are just boarded. This method requires the use of 150mm thick insulation between the rafters and a 50mm air gap to prevent cold bridging occurring.

Given below are 3 of the most popular methods by which you can insulate your dormer roof and the best way to tackle this task to achieve the desired results. Secure the flaps on the sides of the batt insulation to the dormer wall studs with an insulation stapler. Along both lengths of the house on either side of the upstairs bedrooms are very large eaves. This method requires the use of 150mm thick insulation between the rafters and a 50mm air gap to prevent cold bridging occurring.