Insulating Existing Pitched Roof

How to install pitched roof insulation beneath and between the rafters 1.

Insulating existing pitched roof.

A cold roof is where the insulation is between and below the rafters and the rafters remain cold. To form an avcl seal. The current trend is for a warm roof where insulation is installed between the rafters thereby keeping the roof timbers warm. At the same time the areas below the roof benefit from increased comfort both during the winter and the summer.

The best way to insulate a pitched roof is to install the very latest insulation technology which comes in the form of spray foam insulation. If there is only 25mm of insulating material then this is likely to date back to the 1970s as this type of. If you do have existing roof insulation the first thing to do is to check the depth. This multi purpose material is mixed with water and blown directly onto the designated surface using highly specialist equipment.

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. Then you could simply insulate the pitched roof. 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. 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. Its versatility is the key to its popularity whether being used to achieve. Install timber noggins where the joints in the insulation are unsupported. 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.

But the best solution is actually to insulate both the attic floor and the underside of the roof. Arguably the most popular pitched roof solution installing insulation between and under the rafters uses the depth of the structural timbers to best effect.