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Re: Plywood Deck - Waterproofing

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Bill,

	Why not use pressure treated plywood?  It's used a lot for foundations;
it should work for your  application.

				Regards,

				H. Daryl Richardson

Bill Polhemus wrote:
>
> I have an exterior covered entryway that I have to finish up designing right
> quick. The original design by the architect had a sloped standing-seam roof,
> but with no provision for lateral wind resistance.
>
> When I pointed out we were going to have to do something (horizontal
> bracing, etc.) the architect and I discussed it for awhile and he came up
> with simple plywood sheathing under the standing-seam roof deck. My question
> to him was "how do we keep the plywood from rotting when, as is inevitable
> here in Houston, it will stay wet for much of the time. He answered "just
> put some notes in there about a wood sealer, and roofing felts.
>
> Has anyone else done a plywood diaphragm as a "sub-roof" under
> standing-seam? If so, how did you tackle this problem?
>
> William L. Polhemus, Jr. P.E.
> Polhemus Engineering Company
> Katy, TX, USA
> Phone (281) 492-2251
> FAX (281) 492-8203
> email bill(--nospam--at)polhemus.cc
>
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