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Insulating attic dormers.
See more on different types of insulation.
Loose fill insulation is usually less expensive to install than batt insulation and provides better coverage when installed properly.
The rigid insulation method requires the utilisation of 150mm thick insulation in between the rafters along with a 50mm air gap in order to avert cold bridging.
Insulating the floor of the void or the ceiling of the storey below depending which way you look at it is straightforward with a number of options available and is in effect the same as.
If the attic kneewall spaces are used for storage then you ll have to insulate along the roof slope down to the eaves and create an air barrier at the rafters.
This can be done with spray foam or rigid foam cut to fit between rafters and foamed in place with a foam gun.
Loose fill or batt insulation is typically installed in an attic.