Insulating Rafter Headers Above Outside Walls On 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.

Insulating rafter headers above outside walls on roof.

How to insulate a roof. Both products are high performance pir insulation boards which have been specifically designed for this type of roof construction. Building regulations for insulating a roof. Rigid foam board is just above the roof deck or an exterior insulation option.

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. All exterior walls including 3a walls between living spaces and unheated garages shed roofs or storage areas. 3b foundation walls above ground level. It typically has 3 variations.

Floors above cold spaces such as vented crawl spaces and unheated garages. Insulating the roof above the rafters is known as warm roof insulation as the rafters are brought into the insulated envelope of the building. Bare foam board one sided sheathing board or double sided which is also reference as structural insulated panels. Also insulate 4a any.

The previous four options are all used beneath the roof. 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.