Insulating A Pitched Roof With Insulation Boards

Note that this stage is not required if the insulated plasterboard incorporates a vapour barrier.

Insulating a pitched roof with insulation boards.

Please note that these boards require a. Pitched roof insulation is applied directly to the underside of the roof and is primarily used in situations where loft insulation is not practical. Rigid roof insulation board. Composed of a closed cell polyisocyanurate foam core bonded in the foaming process to 1 2 thick duraboard an expanded perlite mineral aggregate board on one side and a fiber glass reinforced facer on the other.

Saint gobain insulation uk manufacture and supply glass mineral wool slabs and rolls along with rigid polyisocyanurate pir boards that can be considered suitable for a wide range of applications across pitched roofs whether you re looking to insulate at joist level or at rafter level in your pitched roof construction. If making a warm pitched roof construction you should opt for some type of rigid insulation boards such as kingspan k7 pitched roof board orcelotex xr4000 pir insulation boards which can be installed both between and over the rafters and offers a level of fire resistance if important and applicable. Kingspan with a warm roof the usual process is to split the insulation into two layers. Both products are high performance pir insulation boards which have been specifically designed for this type of roof construction.

With all the insulation board in place start at the top of the roof and fix the vapour barrier to the rafters using a staple gun fold the barrier material into a sort of z at each rafter so that the staple goes through a double thickness. There will also be kooltherm k7 pitched roof board between the rafters image credit. This may be because you use the loft as a living space or you have storage concerns. Pitched roof insulation is available in a variety of different forms including boards and foil.

With a fibre free rigid thermoset phenolic core and a low emissivity foil outer face kingspan kooltherm k7 delivers superior thermal performance with easy to handle rigid boards. 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. Pir insulation boards such as quinn therm qr roof insulation are widely used for insulating pitched roofs using either the warm roof or cold roof methods thanks to their excellent thermal performance ease of handling and installation their strength and durability. It s light weight provides ease of handling.

For this method of pitched roof insulation we recommend using quinn therm qr roof insulation boards between the rafters and quinn therm ql kraft insulation boards below the rafters.