Plywood Vs Osb

nailkiller1

I have been having a lot of problems with plywood lately
wether its subfloor, roof sheeting, or wall sheating
It rains once or twice
I get delamination and warping
I have switched completely to osb except subloor
next project will be entirely osb
the only problems i have with the osb is swelling thats easy to fix
anyone else experiencing this

strathd

Do a search. This has been discussed many times. If theres a lot of rain coming I coat the subfloor with a cheap deckstain. It helps alot. In my area everything is osb.

neolitic

Use the search function,
there are several threads here
start with this one.....
http://www.contractortalk.com/f14/os...hlight=plywood

Lately, I've been using GP DryPly.
Haven't had any really long term exposure,
but it's nice stuff, and comes ¾ and 1".

__________________
Put your location in your profile!
(Sorry....it seems there really are dumb questions)

neolitic

Aside from using a better than
C grade face, stain seems to be
the trick DryPly uses.

__________________
Put your location in your profile!
(Sorry....it seems there really are dumb questions)

strathd

Thanks. Going to check out dryply. Easier to let them stain it.

nailkiller1

gp dryply has given me a lot of problems
the project I am currently working on will be the last time i ever use the product
the last three projects I have had to repair about 20 sheets

strathd

What's it doing ? Are you talking water damage ?

nailkiller1

swelling buckling warping
worst I have seen in 5 years
current project rained 2 hrs 1 morning
started failing that afternoon

nailkiller1

i forgot delaminating

Warren

20 sheets of repair on one job?? We have used all types of floor sheathing over 25 years. oSB has problems of joints swelling and generall weakening of the sheet, plywood can delaminate and swell. i agree that applying a sealer can help a little as we usually do this on the big houses. I have never had to replace 20 sheets though, maybe 5 or 6 at most out of a job of probably 200-300 sheets. if you had failure in 20 sheets the manufacturer should be notified and possibly a claim should be filed with them.

We have been using a lot of the advantech lately and we like the results except for the weight of the sheets and the difficults of nailing. nothing we can't live with though. We have replaced 0 sheets so far and have used it for probably a dozen houses.

neolitic

Like I said, no experience with
long term exposure, but last month
3 sheets were left out in the rain
for three days (leaning against a wall)
and they were fine.
Other than that only a couple of days
installed and exposed to rain, but still
no problems.

__________________
Put your location in your profile!
(Sorry....it seems there really are dumb questions)

loneframer

Advantech is the shiznit. very limitted edge swelling with multiple exposeres to rain. We always gap sides and edges to allow for expansion.

__________________
__________________________________




"Walking the fine line between production and perfection"



__________________________________

nailkiller1

Rep came out
agreed with problem
will give me as many sheets as i want
do you think he will bring his hammer and nailpuller with when he comes back

nailkiller1

is advantech plywood or osb
I would be happy with edge swelling

Warren

nailkiller.

No way i would replace 20 sheets on my dollar when they have obviously accepted responsibility for the defect. i will generally do these things at cost if i know the lumberyard well but I'm not gonna take the hit for their bad products. your labor for the repair would include complete removal and new installation as well as setup/teardown time and disposal of the old crap. have had very few times when i've had to do these types of replacement but i have always been fair and the suppliers have never questioned my bills.

loneframer

Advantech is OSB treated with something to resist moisture. I've heard of guys throwing a scrap into a pool for several days with no swelling, but I've never tried it myself. It holds up well in the real world though. I won't use anything else if it is my call.
Her is a pic of it.

__________________
__________________________________




"Walking the fine line between production and perfection"



__________________________________

cordless

Advantech is definetly the way to go for me. Has anyone tried the Zip System (w/ tape) for sidewall and roof sheathing?

loneframer

Almost, but that's a negative on the Zip dealio

__________________
__________________________________




"Walking the fine line between production and perfection"



__________________________________

Tom Struble

that would be strange not having a wrb probably a rain screen detail be best?

galla35

could not have said it any better i preach this stuff