Retrofit Pitched Roof Insulation

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.

Retrofit pitched roof insulation. In this blog post we explore some of the options available. Firstly just to make it clear when we are talking about rafter level we mean the timbers that support the pitched roof. For larger roofs you may need to provide direct framing to framing contact. The system sheet will show you all the components required and which bits go where.

All components for the system are available below. Retrofitting interior insulation to a pitched 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. 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.

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. 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. In the following it will be shown which insight can be gained with.