Taking my time and working virtually alone, my house project will take a few take a few months before everything is weather tight. My question is how much water can exterior plywood (CDX) take before starting to fail. I would imagine vertical sheathing would not be so much a problem as would be horizontal flooring. I know OSB flooring would most certainly be out of the question. Any thoughts…
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On the floors use "Advantech" That stuff is bullet proof.
I've had water sit on it for days and weeks with no problems and its cheaper than CDX
Far as the walls or roof goes.
Felt paper the roof ASAP and house wrap or felt the walls.......or use Advantech there as well.
Be well
andy
My life is my passion!
http://CLIFFORDRENOVATIONS.COM
There are some new plywood sheathing options out there that resist weathering for more extended periods. I have seen the add for LP OSB sheathing that comes with drain holes and is weather resistant to prevent swelling but I am yet to use it.
http://www.lpcorp.com/products/products_detail.jsp?ProductGroupID=14&ProductID=412
Another option I have seen (for smaller houses) is to drill holes in the subfloor and then coat the top with a cheap exterior clear coat or paint. On siding or roofing, just get some tar paper over it before the weather hits. You may have to replace the paper on the roof when you get around to shingling so you don't have the tar paper waves showing up in the finished shingles. Remember, tarpaper is much cheaper than plywood.
gk
The earlier advice is good. But, also consider that you have contemplated an enormous undertaking by yourself. You might really want to consider contracting out some of the work, like framing, or, as soon as the roof is sheathed, contract out the roofing and just get it done. There are just some things worth paying experts to do, even if you have the skills to do them yourself. Your time, sanity, and body are worth a lot.
Advantec isn't available on the West Coast, but being one who prefers plywood over OSB, and in a climate subject to unannounced rain, I usually coat the floors with a liberal amount of Thompson's Water seal. That's about all it's good for anyway, so buy it at HD or Wally World. I usually buy 5 gallon cans of it and pour it out a couple gallons at a time and spread it with a mop or broom. A garden sprayer would also work.
Georgia Pacific also has a plywood subfloor T&G panel that can be ordered with waterproofing already on it. Do a Google search for GP Plytanium.