Insulating Rafter Headers Above Outside Walls On Roof

Both products are high performance pir insulation boards which have been specifically designed for this type of roof construction.

Insulating rafter headers above outside walls on roof. For this method of pitched roof insulation we recommend using quinn therm qr roof insulation boards between the rafters and quinn therm ql kraft insulation boards below the rafters. Also insulate 4a any. 3c foundation walls in heated basements full wall either interior or exterior. The limiting u value the maximise u value which cannot be exceeded required under current building regulations for the roof is 0 20w m.

3b foundation walls above ground level. How to insulate a roof. Floors above cold spaces such as vented crawl spaces and unheated garages. Bare foam board one sided sheathing board or double sided which is also reference as structural insulated panels.

Building regulations for insulating a roof. Rigid foam board is just above the roof deck or an exterior insulation option. All exterior walls including 3a walls between living spaces and unheated garages shed roofs or storage areas. Heat rises and therefore the building regulations requirements for heat loss through roofs are more stringent than those for walls.

It typically has 3 variations. Insulating a pitched roof above the rafters is the common method chosen for new builds and re roofing existing detached buildings as it provides superior thermal performance for the building. The previous four options are all used beneath the roof.