Is there a way to apply either cedar or asphalt shingle so
that the nails will not go through the other side of a 3/4"
roofing board? If the nails go through then I will have
to put siding on the inside of the roof. It's just a rustic
porch and I don't want to have to cover the inside walls.
I could put 1/2" ply on top of the roof boards, but was
wondering if there is a simpler way, such as applying 2
layers of #30 felt paper. I've done cedar shingle over 1"
roof boards in a shed and only a few nails came through
and are not noticeable, but the roof boards I am using now
are only 3/4" thick. Thanks,
You do have to use the proper length of nails and according to
the instructions with the shingles, they MUST protrude through
plywood sheathing material or 3/4" into planking. If they
don't, then you don't have a shingle warranty.
The way around this is to have two layers of decking, one for
the nails to protrude through, and one for the nails to
protrude INTO. The other option is your original one, and
that is to cover the protruding nails with something
underneath for looks.
I will answer, but I am not sure who you are talking to here.
If you have an inch protruding through, then your nails are
too long. The nails should JUST protrude through plywood or
OSB sheathing. As far as I know, it is an expansion and
contraction thing. The nail that is all the way through will
not expand outward because it has nothing to push against as a
nail that is seated in the sheathing material does. If it is
not all the way through, then as it expands, it can ONLY
expand outward, which will loosen the nail and cause failures.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.