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