Roof underlayment is simply a type of membrane that s installed to your roof for some extra protection.
Roof membrane under tiles.
The industry standard minimum underlayment for a tile roof with a slope of 4 12 or greater is a single layer of astm rated 30 felt paper.
The tiles are lightweight and easy to install but are not designed for heavy furniture.
An underlayment for use under tiles needs to be rugged enough to support the weight of stacks of tiles.
Cheaper felt paper without an astm rating widely sold in home centers is much thinner and should not be used.
And by protection we mean it ll protect your shingles from any kind of water penetration.
Elastomeric membranes are one of the most durable types of anti fracture membrane systems that can be installed under a ceramic tile installation.
Let s look at these in more detail.
High resistance non breathable underlays and low resistance breathable or vapour permeable membranes.
Selecting underlayment for tile roofing the type of primary roof determines the type of underlayment more than any other factor especially in the case of a tile or metal roofing system.
This factor alone can rule out many types of underlayment.
For condos and commercial site you ll want a solid surface rubber tile that is 2 inches or thicker.
They are flexible membranes sold in long roles and.