The strips are there to make sure the shingles don't seal to one and other
in the bundle.
The stripes underneath the shingle line up with the strips of tar on the top
of the shingle in the bundle. The tar on top of the shingle is what is to
bond to the bottom of the row above it.
On allot of shingles "DO NOT REMOVE" is printed on the strip. For some
reason they don't want the bottom of the shingle sticking to the tar paper.
- Nehmo -
It wouldn't hurt anything if a shingle stuck to the underlayment . It's
already nailed or stapled to it. The "DO NOT..." is just a simple way of
saying "It's not necessary to and you wouldn't accomplish anything if
Have a cite for that? How would it add any holding capability as the
holding capability is in the wood deck, not the shingle. That thin
strip will also not add anything to keep the nail from pulling through
One reason to nail where the manufacturer says is so you are nailing
not only through the shingle you are currently working with, but also
through the top of the shingle below it-think of it as a kind of
double protection. Another reason is that if wind does get under a
shingle, you want the nails as low as you can get them and still have
them water proof since the more surface area the wind can grab the
more likely it is to remove a shingle for you.
The plastic strips serve no other purpose than the keep the shingles
from sticking together while packaged up. No other reason at all.
None. I've never seen any statement from any shingle manufacturer
we've worked with in over twenty five years of working with roofing
materials that says otherwise.
Of course I could be mistaken, just sharing what I've seen while on
the job, while reading web sites, what I've seen in warranty
(Remove the Primes before e-mailing me)
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