Insulation Slate Roof

3 before you start do your homework.

Insulation slate roof. 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. The underside of the roof sheathing will dry rapidly to the exterior through the slate due to ventilation drying and diffusion. Insulation is often laid in contact with the roofing felt. If you create an air space under the roof sheathing boards as dana suggests there is no need to have any soffit vents or ridge vent.

It is vapor permeable and air leaky. If you want to insulate the sloping roof you definitely don t want to install spray foam against the back side of the slates. Insulation laid so that it covers the eaves significantly reduces ventilation to the roof. Ice water shield.

Answered 14th jan 2013 like 2. A well ventilated roof space is good this stops your timbers rotting. Read about how to install starter courses take a look at common contractor errors watch some video clips read about drip edges and cant strips if necessary look at some of the nuances that may be pertinent to your installation such as cleats on aprons cleats on. Slate is a wonderful forgiving roofing.

Understand headlap read about the common mistakes people make when installing slate roofs.