Truss Roof Over Factory Metal Roof

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Bruce71913
Posts: 4
Joined: Tue May 05, 2020 8:25 pm

Truss Roof Over Factory Metal Roof

Post by Bruce71913 » Tue May 05, 2020 8:51 pm

I live in Arkansas, cold winters, hot humid summers. I want to put a metal roof on my 14' x 51' home using a truss system. I currently have a slightly arched metal roof that has a small leak at one one the seams that I plugged with solar-seal (whatever it's called). I am tired of resealing the roof every couple years. Enough background.

I want to install a metal roof using a truss system that doesn't touch the old roof (except around the perimeter), which is easy enough to design. So my question is do I need to worry about sweat (in summer) or ice (in winter) and mold/mildew forming between them?

I thought maybe applying a coat of solar cool & while its wet covering it with 1" styrofoam to assist in insulating

Thought anyone?

Bruce71913
Posts: 4
Joined: Tue May 05, 2020 8:25 pm

Re: Truss Roof Over Factory Metal Roof

Post by Bruce71913 » Sat May 23, 2020 3:18 pm

P.S. I forgot to mention that I am trying to avoid sheeting the roof with plywood. This is what prompts my sweat question.

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