As well, seams are often elevated at least 2” off the surface of the roof and, thus, away from moisture. A quarter-inch slope is the lowest you would go with a metal roof – experts recommend at least a half-inch minimum to ensure a weatherproof interior for your shed. Remember, metal roofing is more expensive than shingles. The most common metal shed roofing material is thin steel sheet that is galvanised, profiled and painted. Other metals are used in roofing such as zinc, copper and lead which I'm only going to mention these in passing. These materials are several times more expensive than steel, require different installation techniques. Upgrade an OLD Metal Shed Exterior. Lots of people have one of those dented, rusting old tin sheds wasting away in the back yard where they keep the yard tools, lawnmower, and associated stuff, and cringe every time they see it. You try to cover it up with vines and flowers, but it doesnt quite cut it.
The lifespan of asphalt roofing felt is about 15 years. Corrugated steel sheets can be ordered curved to the radius that suits your project. The curved shed roof design has a real visual appeal. Cedar Shingles 3. Resources page Best roofing products.

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