Quote:
Originally Posted by Fordguy64
I'm trying to decide if I'm going to put insulation under the panels or not...
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Well, I put a metal roof on my place... I put a skylight in the roof, too, so it's quite easy for me to inspect the roof and check out the heat or cold any time I want.
What I have found is that even on a cold winter day, there is a useful amount of heat on the face of the roof that is toward the sun. I do wish that I had put PEX under the roof for harvesting heat energy... it would have been easy and cheap and hidden from view and also hidden from environmental ravages.
Care would need to be taken to avoid nailing through the PEX, but it can be done.
The heat would be too low in temp to use directly for house heating, but it would be useful for DHW preheat.
Metal roofs have a much longer life than comp. This kind of plan would not make sense with comp, due to nails when a new comp roof goes over the old one.
-AC