I have a modular home in NC we get temps from 2 to 107 degrees.
They did not bother with moisture barrier on the ground in the crawl space so we have moisture / mould issues. I
had planned to put down moisture barrier and insulate the crawlspace walls this summer, but had health stuff going...
Asphalt shingles are only economical in the short run. Our modular has shingles that were supposed to be guarenteed for 25 yrs..the have lasted less than 20 and this is a premium Palm Harbor and we are not the first owners.
