Roof Rafter Insulation Boards

As this requires fitting insulation above the rafters the roof covering will have to be removed in order to fit the insulation.

Roof rafter insulation boards.

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. Uncompressed size 610 x 402 x 60mm. This roof type will require a breathable membrane like kingspan nilvent to be fitted above the insulation. Fits rafter or joist spacings of between 320mm and 395mm.

Insulating the rafter space will give you a warm loft. 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. Rigid foam board is just above the roof deck or an exterior insulation option. Depending on the specifics of the roof it may be possible to fully fill the rafter depth or in most cases leave a 25mm or 50mm air gap between the top face of the insulation and the sarking membrane.

Insulating the roof above the rafters is known as warm roof insulation as the rafters are brought into the insulated envelope of the building. Full installation instructions included. Insulating a pitched roof above the rafters is the common method chosen for new builds and re roofing existing detached buildings as it provides superior thermal performance for the building. Rigid polyisocyanurate pir foam insulation boards from celotex are among the most thermally efficient commonly available insulation materials on the market.

Reduces heat loss and energy bills. Made from flame retardant material. Our insulation solutions for warm roofs maximise both space and thermal efficiency whilst also contributing to acoustic performance. Celotex polyisocyanurate pir foam insulation boards are easy to cut and handle.

The rafters are joined together by a horizontal ridge board at the top and tied together by ceiling joists at the bottom. Pack of 3 total cover is 0 74m. Being lightweight they do not impose significant additional loads on existing structures. The construction build up for this can be seen on our online u value calculator.

Kingspan with a warm roof the usual process is to split the insulation into two layers. The previous four options are all used beneath the roof. This means insulating between or below the sloping beams that form the construction and support a sloping roof. Bare foam board one sided sheathing board or double sided which is also reference as structural insulated panels.

There will also be kooltherm k7 pitched roof board between the rafters image credit. To create a warm pitched roof insulation such as kingspan kooltherm k7 pitched roof board should be fitted between and over the rafters. It typically has 3 variations. Squeeze to fit for easy installation between rafters or floor joists.