If you are in a freezing climate, what are your experiences with doing exterior decks this way:
Wood frame construction, P.T. posts but no P.T. beams or joists (meaning all put the posts are #2 grade SPF), Advantech deck, Schluter Ditra membrane, tile over, done.
Edited 10/12/2008 11:48 am ET by Gene_Davis
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bump
I'm just sayin'
I would think the necessary 1/4" slope coupled with the slipperyness of the tile in freezing weather would suggest a thin flexible decorative concrete alternative. They are available even without the Ditra.
I did a thread on one about 18 months ago.
Tile, itself, should not be a problem. It is available in all kinds of textures and COF's.Done RIGHT is can be done.But I have concerns about doing this over non-weather rated materials..
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A-holes. Hey every group has to have one. And I have been elected to be the one. I should make that my tagline.
in your climate - i would try to talk people out of doing this.
if Ditra is considered acceptable as the waterproofing membrane, then ok, but it has to be treated as such for all of the sidewall flashing details. i don't know anything about how it handles UV light.
and just as importantly, the drainage edge detail which is overlooked 99.9% of the time in these applications.
you should be able to find what you need here:
http://www.schluter.com/142.aspx
i hope you have someone good to do this install.
carpenter in transition
From the joists up: Plywood, Blueskin, Durock, Ditra, tile, grout sealer.
And, as someone else mentioned, don't forget the edge flashing/gutters. The 'drip-edges' gotta drain below that entire sandwich. Schlüter makes a system designed just for this, but it's expensive. Look at it, then figure out if you can fabricate your own or have your local tin guy do it cheaper.
Dinosaur
How now, Mighty Sauron, that thou art not brought
low by this? For thine evil pales before that which
foolish men call Justice....
What is the point of the Blueskin, if it will be penetrated by all the fasteners holding down the Durock?
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"A stripe is just as real as a dadgummed flower."
Gene Davis 1920-1985
Blueskin is a roofing membrane, and as such is designed to be self-healing at fastener penetrations. Done this way, that 'sandwich' is appropriate for decks forming a roof over interior, heated spaces.
BTW: Even though thinset won't stick to the top of the Blueskin, it's recommended to bed the Durock in a thin screed of thinset to fill any voids that might occur.
Dinosaur
How now, Mighty Sauron, that thou art not broughtlow by this? For thine evil pales before that whichfoolish men call Justice....