Insulate Between Roof Rafters

An efficient room in a roof in a new build property where over rafter insulation is not desirable.

Insulate between roof rafters. Common rafter depths range from 100mm to 200mm. Place the plastic sheeting on top of the rolled insulation. Roof insulation refers to the practice of installing insulation on the roof slope both above and below the rafters. This generally would not be a sufficient thickness to achieve the u values required to meet building regulations and more insulation would need to be added.

Ceiling insulation refers to any type of insulation installed within the floor nearest to the roof structure of the home. Arguably the most popular pitched roof solution installing insulation between and under the rafters uses the depth of the structural timbers to best effect. Its versatility is the key to its popularity whether being used to achieve. Install ventilation baffles into the space between the rafters before you install the insulation usually by stapling into place.

Make sure it is flush against the wood as even a 1 inch gap can cause a 20 percent heating loss. When it comes to pitched roofs however adding a thick layer of insulation to the rafters can result in a depth of roof construction that may not suit every site meaning over rafter insulation sarking only is not a viable option. If your attic is going to be converted into livable space then you will need to insulate the roof rafters. The benefits of insulating a building around the outside protecting the structure and effectively creating a tea cosy effect are well publicised.