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-   -   beam membrane for deck (http://www.diychatroom.com/f19/beam-membrane-deck-25592/)

drewid153 08-22-2008 12:04 PM

beam membrane for deck
 
Hi
Im in the process of building a deck and was wondering if it is nessasary/a good idea to cover the top of the beams with a weatherproof membrane of some sort. The decking will be cedar and the framing ACQ so im guessing water will sit on the beams.

thx

Termite 08-22-2008 03:31 PM

If your beams are ACQ they're treated to take the water. There's nothing wrong with installing a strip of flashing or ice/water shield on top of them, but with treated wood it is an unnecessary step.

AtlanticWBConst. 08-22-2008 06:31 PM

Not necessary on the joists.

Tho, we do install a membrane strip on joists that are doubled (New England). The reason we do that, is to keep water out, that can freeze and expand, and pull and warp the two or more boards from eachother. This is not required, just a little over kill we like to do...

buletbob 08-23-2008 07:34 AM

Quote:

Originally Posted by AtlanticWBConst. (Post 150915)
Not necessary on the joists.

Tho, we do install a membrane strip on joists that are doubled (New England). The reason we do that, is to keep water out, that can freeze and expand, and pull and warp the two or more boards from eachother. This is not required, just a little over kill we like to do...

Nice Tip.

Termite 08-23-2008 08:52 AM

Quote:

Originally Posted by buletbob (Post 151014)
Nice Tip.

Sure is!


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