Here's the scoop from my contractor... Due to winter weather (40-60
degrees here in California), the shingles will contract, leaving voids
underneath. He assured me that when summer comes, the shingles will
spread out and laminate to the ones below. He also assured me that for
now, rain will not be an issue. The question I have is, why would the
shingles automatically laminate to one another, just because they're
softer (due to heat)? And once they're laminated, what prevents them
from curling up in the winter? I guess I don't have enough knowledge
on how shingles mate to one another. Any advice would be appreciated.
Thanks.