Insulating Rafter Headers Above Outside Walls On Roof

Heat rises and therefore the building regulations requirements for heat loss through roofs are more stringent than those for walls.

Insulating rafter headers above outside walls on roof. Floors above cold spaces such as vented crawl spaces and unheated garages. 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. How to insulate a roof.

Although there are many different circumstances that may call for insulating roof rafters the means to determine the necessity for insulating rafters remains the same. Rigid foam board is just above the roof deck or an exterior insulation option. It typically has 3 variations. Building regulations for insulating a roof.

3c foundation walls in heated basements full wall either interior or exterior. Insulating the roof above the rafters is known as warm roof insulation as the rafters are brought into the insulated envelope of the building. All exterior walls including 3a walls between living spaces and unheated garages shed roofs or storage areas. Both products are high performance pir insulation boards which have been specifically designed for this type of roof construction.

3b foundation walls above ground level. 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. For example if the space beneath the rafters is going to be used for a living area then you will need to insulate the roof rafters.