At 10:09 AM 4/2/2002 -0500, datesmanaric@netscape.net wrote:
>Greetings all,
>
>Been lurking on the list for a few months and learned a great
>deal. Finally have a question for you all.
>
>I'll be putting a new roof on our Florida room this weekend and have not
>been able to find any instructions on the net on how to deal with the top
>edge of the roof. The room comes off the back of the house and, when
>looking from the house, the roof pitches ever so slightly from right to
>left. The highest point on the roof is on the roght hand side and does
>not pitch back down or abutt a wall. The edge of the top course of
>shingles is basically exposed. I have not been able to find any
>information on the net explaining how to deal with this. I'd rather not
>use the existing roof as a guide as it was poorly installed by the guy we
>bought the house from and from dealing with his attempts at wiring I think
>its safe to assume its wrong.
>
>So how does the top edge get finished? I assume I would want a drip edge
>there to keep rain from getting under the top course of shingles (going to
>use 36" roll shingles). Would this go on top of the top course? I would
>think so as that would be certian to keep rain from getting under
>there. Nail every 5" or every 2'?
>
>I would appreciate any input greatly. This is the last issue I have to
>deal with prior to the house going on the market next week.
Okay, I'll try this one.
You need to determine the roof pitch. If it's flat, or almost flat, you
CANT use shingles, you need a "Built-up" roof. Papers, membranes,
and tar. If you have enough pitch for roll roofing, you're nailing and
using roofing cement. Without enough pitch shingles don't work.
The thing you need to know about a roof is how it catches the water, and
then how it's transported from the peak to the eaves and into some sort of
pipes that collect the water and move it away from the foundation. Roofs
don't leak at the peak, only individual drops hit there. But every drop
that hits anyplace on a roof eventually rolls off the edge. With enough
pitch the water is moving in one direction, when a roof is flat the water
seeks any gap. That's why a flat roof needs a seamless surface.
The instructions aren't on the 'net. The manufacturer of the roofing
system you choose specifies what needs to be done. The geometry of your
roof determines what roofing systems are suitable. Measure your roof,
including the pitch. Go shopping. Pick appropriate roofing system for
your specifications. Follow the manufacturer's instructions.
Properly installed, roofs perform. Shortcuts create misery. I think
I've done 3 complete reroofs. When you strip the old one, you see that the
leaks show up first where the installation was substandard.
Steve Shipley
Seattle, WA
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