on 6/5/2008 1:12 AM Aaron Fude said the following:
Because you do as much as aesthetically possible to prevent water from
entering the house when installing anything that goes through the roof,
so you don't have to do it later, before fixing the water damage inside.
All of the replies make perfect sense to me.
The one thing I'm puzzled by is that all of those would also be good
reasons for caulking each individual shingle as well. Yet, that's not
the case. Is that becuase there's plywood under the shingles and a
hole under the flashing?
Well, it's been a long time since I handled any shingles, but I remember
the asphalt ones had sticky strips on the bottom near the front edge
that would bond with the shingle underneath; does that count? Of course,
neither wood shakes nor tiles have any such sealants, and they seem to
I have a customer with a practically brand-new (OK, 10 years old, but to
me that's brand-new) million $-plus house, who reported a leak around a
light fixture in a room. Walked the roof, which was in just *perfect*
condition; nothing loose, not a crack where one could see a chance for
water getting in. Turned out it happened during a storm this spring
where high winds drove rain under the shingles. In a case like that,
there's not much that's going to stop *some* water from getting in somehere.
The best argument against democracy is a five-minute
conversation with the average voter.
That looks like a fairly flat roof they are installing on, so my guess is
that they are trying to prevent 'run-under' where the water isn't
necessarily backup UP under the shingles, but running in from the side.
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