Insulating Existing Pitched Roof

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

Insulating existing pitched roof.

When insulating pitched roofs with old style felt it is important to maintain a minimum 50mm well ventilated cavity between the felt and the top of the insulation. In this way you prevent the heat from the rooms below escaping to the attic rooms above. This multi purpose material is mixed with water and blown directly onto the designated surface using highly specialist equipment. To form an avcl seal.

If there is only 25mm of insulating material then this is likely to date back to the 1970s as this type of. But the best solution is actually to insulate both the attic floor and the underside of the roof. A cold roof is where the insulation is between and below the rafters and the rafters remain cold. Install timber noggins where the joints in the insulation are unsupported.

How to install pitched roof insulation beneath and between the rafters 1. In your scenario the space between the rafters can serve as this ventilated cavity allowing you to attach insulation continuously to the underside of the rafters. Its versatility is the key to its popularity whether being used to achieve. Arguably the most popular pitched roof solution installing insulation between and under the rafters uses the depth of the structural timbers to best effect.

If you do have existing roof insulation the first thing to do is to check the depth. How to insulate a pitched roof at rafter level a warm roof is where it is above and between the rafters so the rafters are kept warm. Using suitable mechanical fixings fix quinn therm ql kraft boards to the underside of the rafters with the long edge. On new build or replacement pitched roofs the ideal build up would be insulation fitted over and then between the rafters giving a big boost for airtightness image credit.

At the same time the areas below the roof benefit from increased comfort both during the winter and the summer. Then you could simply insulate the pitched roof.