How To Install Pitched Roof Insulation

Pir insulation boards such as quinn therm qr roof insulation are widely used for insulating pitched roofs using either the warm roof or cold roof methods thanks to their excellent thermal performance ease of handling and installation their strength and durability.

How to install pitched roof insulation. It is important to maintain a 20mm gap between the roofing substrate and the insulation. In this blog post we explore some of the options available. The decision on which method to use is usually dependent on the sarking or underlay. Before fitting any insulation to the sides of a pitched roof space any repairs to the roof should be completed once the insulation is in place it will be harder to spot any leaks inside the roof and any leaks will soak the insulation itself.

How to install pitched roof insulation beneath and between the rafters insulation can be installed between the rafters using a ventilated roof construction or an un ventilated roof construction. If you decided to use a rigid foam board to help insulate your cathedral ceiling you would install the board on top of the roof sheathing and underneath the plywood at the top of the roof. Saint gobain insulation uk manufacture and supply glass mineral wool slabs and rolls along with rigid polyisocyanurate pir boards that can be considered suitable for a wide range of applications across pitched roofs whether you re looking to insulate at joist level or at rafter level in your pitched roof construction. When insulating a pitched roof at rafter level there are a number of key design considerations which will affect the build up of the roof and the choice of insulation.

When installing insulation in a roof eave i e. As there s no insulation below rafters headroom is maximised creating more useable space. Where the roof joins the ceiling make sure the insulation covers the top plate but is not in contact with the roof. Rigid foam board installation in the case of a cathedral ceiling involves installing three different layers that are each 1 5 inches thick according to the.

This approach can be used to create an unventilated roof structure helping to keep out unwanted drafts. Its versatility is the key to its popularity whether being used to achieve. For a warm roof solution you will need to install insulation in the plane of the roof pitch that is immediately below the sloping 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.

Firstly just to make it clear when we are talking about rafter level we mean the timbers that support the pitched roof.