Pitched Roof Insulation Between Rafters

Warm roof insulation 1.

Pitched roof insulation between rafters.

Pitched roof insulation between and over rafters the benefits of insulating a building around the outside protecting the structure and effectively creating a tea cosy effect are well publicised. To form an avcl seal. Insulating a pitched roof above and between the rafters. Rafter line insulation maximise space and performance utilising a pitched roof as a usable living space is an effective way to maximise the square meterage of a residential development.

The amount of heat loss through cold bridging can be minimised by using another layer of insulation either above or below them. So if you are insulating a pitched roof we would recommend having insulation either above or below the rafters. Using earthwool rafter roll between rafters and knauf insulated plasterboard below rafters with lr underlay pulled taught and insulation to fully depth of rafters note. Rafter sizes assumed to be 38mm wide at 600mm centres 6 3 bridging 10mm deeper than the insulation to account for the draped membrane.

Arguably the most popular pitched roof solution installing insulation between and under the rafters uses the depth of the structural timbers to best effect. Obviously heat will be lost through the rafters at a faster rate than it is lost through the insulation. The benefits of insulating a building around the outside protecting the structure and effectively creating a tea cosy effect are well publicised. Its versatility is the key to its popularity whether being used to achieve.

The roof will typically be insulated above the rafter line creating what is most commonly known as a warm roof. Install timber noggins where the joints in the insulation are unsupported. An efficient room in a roof in a new build property where over rafter insulation is not desirable. A cold roof is where the insulation is between and below the rafters and the rafters remain cold.

Using suitable mechanical fixings fix quinn therm ql kraft boards to the underside of the rafters with the long edge. 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. Measure the space between the rafters where the insulation will be placed and cut the insulation boards marginally.