Pitched Roof Rafter Insulation

There will also be kooltherm k7 pitched roof board between the rafters image credit.

Pitched roof rafter insulation. Go with insulation between and over or between and under the rafters. Kingspan kooltherm k7 pitched roof board is a premium performance rafter level insulation for ventilated or unventilated pitched roofs. Both products are high performance pir insulation boards which have been specifically designed for this type of roof construction. Insulating the roof above the rafters is known as warm roof insulation as the rafters are brought into the insulated envelope of the building.

Getting to know kingspan kooltherm k7 pitched roof board. 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. Utilising a pitched roof as a usable living space is an effective way to maximise the square meterage of a residential development. Arguably the most popular pitched roof solution installing insulation between and under the rafters uses the depth of the structural timbers to best effect.

Where insulation is being provided between and over pitched roof rafters we recommend that the insulation on top of the rafters is equal or greater in thickness than the insulation between the rafters. Its versatility is the key to its popularity whether being used to achieve. In this blog post we explore some of the options available. Kingspan with a warm roof the usual process is to split the insulation into two layers.

Pitched roof rafter level warm roof application overview our insulation solutions for warm roofs maximise both space and thermal efficiency whilst also contributing to acoustic performance. 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. The roof will typically be insulated above the rafter line creating what is most commonly known as a warm roof. On this basis 70mm between and 70mm on top as you have proposed is perfect.

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