Quote:
Originally Posted by BrianL99
"Beams" typically support floors, not specifically roofs. A 2"x12" may be a roof rafter, but not usually not a beam (unless it was a tiny house).
Trusses are generally, pound for pound, inch for inch, stronger than dimensional lumber.
Solar system are usually fairly light-weight and most any roof structure that meets recent building codes, can bear the weight of a solar system.
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What do you do when you have a roof leak and the solar company can't or won't fix it, and the roofer won't work on a roof with solar panels? In my opinion, installing solar panels on a perfectly good asphalt shingle roof is always a bad idea.