Retrofit Pitched Roof Insulation

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.

Retrofit pitched roof insulation.

In this blog post we explore some of the options available. It needs to be furred out with something so the trim details will later match. 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. The system is suitable for most internal finishing options including lime plaster clay plaster or plaster board finish.

All components for the system are available below. For larger roofs you may need to provide direct framing to framing contact. Whether a high pitched roof facing north can be assessed more realistically using the boundary conditions for flat roofs exposed to sunshine or boundary conditions for walls is left to the judgement of the person in charge. Retrofitting interior insulation to a pitched roof.

Firstly just to make it clear when we are talking about rafter level we mean the timbers that support the pitched roof. Hack n stack sealed foam board between the rafters would be better since it s at least an air impermeable insulation but even that would require a vent gap below the roof deck to meet code and you d still be under r38 on that 2x6 rafters unless you. But even though an unconditioned roof won t benefit from being covered in foam it will need to be detailed so that it aesthetically matches the rest of the roof retrofit work.