Summary: If plywood is not dealt with properly, it can swell and create major
problems with roofing, flooring or siding. Correction to this wood
product problem can clean your wallet. These tips cover plywood
characteristics and proper installation of plywood. Read, be informed,
and extract maximum useful life from your plywood project.
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Comments
Al Schneider
06 Dec 2007, 18:07
I am building a 3 season gazeebo and would like some advise on roof
decking. I planed on using a T-111 type plywood with the groves visible
from the inside to give it a little character (tounge & groove is too
$$$).
I'm planning finishing with corrugated sheet metat. Obviously, any
fasteners with protrude through to the visible interior.
Question. Do I need to install a secondary layer of OSB over the plywood to
prevent the fasteners from poking through the other side? If so, isn't this
a lot of unnecessary weight? Is there a "lighter" option?
Is there a maufacturer out there that produces plywood laminated with
tounge and groove overlay.
Thank you....
AsktheBuilder
06 Dec 2007, 19:31
Al,
Install 2x2s over the T-111. Space them at 16 oc as if they were
traditional rafters. The added benefit being a valuable air space under the
metal roofing.
charkles Campbell
21 Dec 2007, 23:51
What is the proper spacing of nails for a 4X8 sheet of plywood?
Aloha,
CC
AsktheBuilder
22 Dec 2007, 07:36
Charles,
That is a building-code question. You need to ask your local building
inspector.
Monte
12 Mar 2008, 23:18
Our ten year old plywood floor has only had linoleum on it for seven or
eight years now (kitchen)and has developed a series of speed bumps possibly
related to an incident when a truck ran into and cracked our foundation. I
can see no damaged wood when looking up from the crawlspace so I suspect it
has delaminated...? Do we remove the linoleum and then just cut out the
broken wood replacing it with new or can we just put a hundred or so screws
through the flooring and lay a new floor on top?
AsktheBuilder
15 Mar 2008, 07:07
Monte,
Did you read all of the columns in my Vapor Barrier category? Sounds nuts,
but if your crawl space does not have a vapor barrier or the right kind,
that is what is causing the humped plywood.
jimbo
24 Mar 2008, 20:34
i work on a framing crew in NC and we nail off the plyboard "osb" which is
7/16 thick the nail countersinks at least 3/8 or a 1/4 b/c the gas
compressor is such a beast, we have like 180 psi - 220 psi at all times
some times it blows the nail gun a part....i tell the boss but he says
fu$k it... and says it not my house.. and some time whole sheets wont even
be nailed off
AsktheBuilder
25 Mar 2008, 07:31
Jimbo,
Have you ever thought of getting down off the roof and turning the pressure
regulator knob while your boss is in the Port-a-Potty????? I urge you to do
the right thing..... You boss is the type of person that gives this
industry a BAD reputation. He is also bad for the ecosystem as all he is
thinking about is making more money for himself. You should think about
starting your own company and become the highest-quality framer within 250
miles. You will NEVER be without work once you get the word out to all of
the quality builders in your area. They are desperately looking for workers
who really treat the trade as a vocation instead of a job.
johnny piseno
17 May 2008, 07:29
I ned to replace some rotted plywood under my shingles. Can I remove the
shingles from bottom to top just to replace over the plywood. What is your
recommendation.
JJ
10 Jun 2008, 19:35
In fixing my 2nd story deck, I noticed that the dry-rotted deck flooring
was actually sheets of plywood covered with some sort of cement/rock mix.
Since we are planning to do major remodling within the next 5 years, I'd
like to replace the deck flooring with sheets of plywood. I assume that
since plywood was previously used, I can replace it without the cement/rock
covering. Is this a feasible option? What type (OCP?) of plywood would
withstand the weather conditions (northern california)? I don't really care
about the cosmetics - should weather treat the plywood? Thank you for your
help.
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