It can be an expensive surprise for homeowners to find faulty slate installations, especially after moving into a new house. Occasionally, we will find one or two mistakes in new slate roofs. Rarely, will mistakes be found on older slate roofs. Usually, when doing an inspection of an older slate roof, some of the fundamentals don't need to be checked. Had these fundamentals been violated, the roof wouldn't have lasted. On newer slate roofs, the fundamentals should be checked.
Fundamentals
- Install a cant strip of the same thickness of the slate. (For further reading, see "The Slate Book," page 108, by Stearns, Stearns, and Meyer, 1998).
- Use the correct exposure for the size of slate AND roof pitch. (For further reading, see "The Slate Roof Bible," page 198, by Joe Jenkins. 1997) or find a copy of the NSA (National Slate Association) Installation Guide
- Install the first row of the Starter Course chamfered side down and be careful of the sidelap.
For further reading about inspecting slate roofs, slate roof jargon and installation and repair problems,
Below are a few pictures of some of the fundamentals violated on a lower sloped porch roof.
Also See:
Our Neighbor's House: Installing Slate Roofs: from http://www.slateservice.com A new slate roof is a big investment. Whether you are reslating an addition, or installing slate on your ...
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