It had no insulation whatsoever between the plaster and the outside roof.
Slate roof no insulation.
You would first have to create a vent channel under the slates by installing 1x1 sticks at the top of each rafter bay followed by stiff material like rigid foam or plywood.
Check the depth between your trusses and the slates then install the correct thickness of kingspan in the gaps allowing for a 25mm air gap between the kingspan and the slates.
Answered 14th jan 2013 like 2.
I am left with from the outside inwards slates nailed onto planks about a foot wide and half inch thick nailed onto the rafters which are about 10 inches by 3 inches.
Duct work sitting on the floor.
If you want to insulate the sloping roof you definitely don t want to install spray foam against the back side of the slates.
Wet heating coil is fed from a basement boiler.
Then you will require insulation that is safe from the elements.
Roof is the original slate from 1930 on boards.
Gable windows at at each end summer open winter closed.
Rafters have no insulation under slate.
Looking to build a curved or pitched timber structure with slate roofing.
Duct work is r4 2 flex off of insulated main fixed duct.
There s no insulation under there currently just the rafters and wood plank sheathing.
A well ventilated roof space is good this stops your timbers rotting.
Similar system on first floor in the basement.
Foamglas offers complete safety and peace of mind.
The space between the rafters is a bit haphazard because of the age and shape of the roof.