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Posted by marson on April 26, 2007, 6:30 pm
>
>
> > Ok I have read the directions on my Owens-Corning shingles. However
> > when I started to remove the existing old shingles I see they were
> > nailed in the tar seal strip. Now I am not sure if back 27 years ago
> > the installer had used nail guns. But the shingles are dried and very
> > bad but still I have no leaks.
> > Aside from the warranty being voided isn't this a good place to put
> > the nail for the following reasons?
> > 1. The tar will seal around the nail shaft and the head after the sun
> > has done it's thing.
> > 2. The sealing might stop the nail from popping up in the future.
> > 3. The nail is a bit farther up from the above courses tab's lower
> > edge.
> > I am amazed that the nail is so close to the edge of the overlap
> > anyway when installed via the directions. I would think if anything
> > that the nail should go above the tar seal strip. That way any water
> > that might be pulled up under the shingle by capillary action would be
> > stopped by the seal of the two shingles before reaching the nail.
> > What do you think?
>
> Both Tamko and Certainteed specify nailing in the sticky strip and this is
> the way I have always done it. I don't know where the information comes from
> that nailing in the sticky strip is wrong.
I hadn't heard that you should nail in the sticky strip...obviously
some shingle manufacturers are different. Owens Corning and GAF both
don't allow nails in the strip. The strips' sole purpose is to seal
down the flap of the shingle above, to prevent blow offs and wind
driven rain. If you put a nail in it, it will inhibit the sealing,
especially if the nail is a little high. I once wound up in court
over a roof, and the owner had a fancy inspector come and look at the
roof, and that was one of the few faults he found--nails in the
sealing strip. I guess if you really want to cover your ass, you read
the directions for each brand.
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