Roof Rafter Insulation Boards

This means insulating between or below the sloping beams that form the construction and support a sloping roof.

Roof rafter insulation boards.

Being lightweight they do not impose significant additional loads on existing structures. This roof type will require a breathable membrane like kingspan nilvent to be fitted above the insulation. Squeeze to fit for easy installation between rafters or floor joists. Both products are high performance pir insulation boards which have been specifically designed for this type of roof construction.

The previous four options are all used beneath the roof. 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. Kingspan with a warm roof the usual process is to split the insulation into two layers. 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.

There will also be kooltherm k7 pitched roof board between the rafters image credit. Pack of 3 total cover is 0 74m. Once up at roof level the between rafter boards can be cut accurately to fit the rafter spacings. The rafters are joined together by a horizontal ridge board at the top and tied together by ceiling joists at the bottom.

Rigid foam board is just above the roof deck or an exterior insulation option. Insulating the rafter space will give you a warm loft. Celotex polyisocyanurate pir foam insulation boards are easy to cut and handle. Uncompressed size 610 x 402 x 60mm.

Full installation instructions included. Our insulation solutions for warm roofs maximise both space and thermal efficiency whilst also contributing to acoustic performance. Insulation is friction fitted between rafters with the option to underline the rafters with a layer of thermal laminate to further enhance thermal performance. Made from flame retardant material.

Fits rafter or joist spacings of between 320mm and 395mm. It typically has 3 variations. 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. 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.

Insulating the roof above the rafters is known as warm roof insulation as the rafters are brought into the insulated envelope of the building. Reduces heat loss and energy bills. The construction build up for this can be seen on our online u value calculator. As this requires fitting insulation above the rafters the roof covering will have to be removed in order to fit the insulation.