"Mark" wrote:

How long can I leave these on the roof? They are in bundles plastic wrapped
no more than 2 high - temperature in 60's, sometimes low 70's. They have
been up there for 3 weeks so far and seem ok, a little sticky when hot but
they separate ok when it cools down

Depends on where you live. I'm in NY & just finished up a bundle that
I'd left on the garage roof in Nov 2002.

South facing roof- no shade- paper wrapped- 25 yr shingles. A
couple that were just lying on the roof stuck where they weren't
wanted-- but the bundle was intact & all the cellophane did its job.
The shingles were even flexible enough to do the ridge cap with.

I think AEM is in TX-- probably a little warmer on his roof.g

Jim