Standing water on a low slope metal roof

Guest User
12/30/2004
We had a new boathouse bilt with a metal roof pan with a very small slope. It is covered by a sun deck. Looking between the boards of the deck, I can see standing water in some places after it rains. Will this decrease the lifespan of the aluminum?
Guest User
12/30/2004
If the base metal is aluminum, this may not have a huge effect on lifespan. However, ultimately, sure standing water for long periods of time will accelerate the aging of paint finishes and metal.
Guest User
1/5/2005
What is the least amount of slope that you can have for metal roofing
Guest User
1/6/2005
There are some metal roofs, such as those commonly used on industrial buildings, which can function well down to a slope of 1/4" in 12". Every metal roof system will have a minimum required pitch. Many residential products are 3:12 minimum.
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