We would always recommend having a breathable membrane in place between the tiles and the rafters too to allow the roof to breathe.
Loft insulation for roof rafters.
Insulation between the joists keeps warmth in your living space below and creates a cold loft while insulation in the rafters allows you to keep warmth in the roof space as well.
You can use rigid insulation board carefully cut to size or you can have foam insulation sprayed between the rafters.
The materials used to insulate under the roof include batts of mineral or glass wool insulation held in place by battens of wood attached to and across the rafters alternatively polystyrene.
When you use solid insulation board to create a warm loft the key thing to remember is ventilation you must keep a 50mm gap between the roof and the rigid insulation board.
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When people refer to roof insulation they are referring to the barrier of material within your roof space either between the joists or rafters.
Check out our how to video at the link below.
Loft insulation is a barrier of material within your roof space.
Increasing your home s value.
It can either be laid between the joists the horizontal beams along the floor of your attic or the rafters the angled beams that support the roof.
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Time to get the insulation finished and get this place warm.
With a warm roof the usual process is to split the insulation into two layers.
But if you plan to use your loft for storage only then a conventional cold roof option where the mineral wool insulation rolls are placed in between the ceiling joists above the top floor.
Other benefits of roof insulation include.
If the loft is going to be used as living space then the insulation should be placed at rafter level to create a warm roof.
Improving your home s energy efficiency rating.
An efficient room in a roof in a new build property where over rafter insulation is not desirable a refurbishment of an existing roof with head room to spare below the ceiling or a project converting a loft space into a room in the roof.
An alternative way to insulate your loft is to fit the insulation between and over the rafters these are the sloping timbers that make up the roof itself.