Roof Rafter Insulation Boards

Celotex polyisocyanurate pir foam insulation boards are easy to cut and handle.

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. Insulating the rafter space will give you a warm loft. There will also be kooltherm k7 pitched roof board between the rafters image credit. The rafters are joined together by a horizontal ridge board at the top and tied together by ceiling joists at the bottom.

Insulating the roof above the rafters is known as warm roof insulation as the rafters are brought into the insulated envelope of the building. Rigid polyisocyanurate pir foam insulation boards from celotex are among the most thermally efficient commonly available insulation materials on the market. Both products are high performance pir insulation boards which have been specifically designed for this type of roof construction. Reduces heat loss and energy bills.

Pack of 3 total cover is 0 74m. Full installation instructions included. 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. Made from flame retardant material.

Being lightweight they do not impose significant additional loads on existing structures. Uncompressed size 610 x 402 x 60mm. 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. Once up at roof level the between rafter boards can be cut accurately to fit the rafter spacings.

Insulation is friction fitted between rafters with the option to underline the rafters with a layer of thermal laminate to further enhance thermal performance. Bare foam board one sided sheathing board or double sided which is also reference as structural insulated panels. To create a warm pitched roof insulation such as kingspan kooltherm k7 pitched roof board should be fitted between and over the rafters. This roof type will require a breathable membrane like kingspan nilvent to be fitted above the insulation.

The construction build up for this can be seen on our online u value calculator. Squeeze to fit for easy installation between rafters or floor joists. Our insulation solutions for warm roofs maximise both space and thermal efficiency whilst also contributing to acoustic performance. This means insulating between or below the sloping beams that form the construction and support a sloping roof.

Fits rafter or joist spacings of between 320mm and 395mm. It typically has 3 variations. 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 foam board is just above the roof deck or an exterior insulation option.