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Old 02-13-2019, 07:03 PM   #1
Just In Tile LLC
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Foam Cinderblock?

Evening Ya’ll,
I’m doing two upstairs showers (floated of course)and will be doing the benches out of cinderblock, then I thought maybe someone knows of an online source to get closed cell foam blocks to build my benches and I’ll mud the outsides for ease of weight but still get my mud work in.
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Old 02-13-2019, 07:08 PM   #2
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Why not use foam kerdi board? The thick one. It's made just for that.
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Old 02-13-2019, 08:11 PM   #3
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I am new to this whole mud thing but why couldn't you frame it and float it, treat the top of the bench like a countertop and the face like a stud wall? as for the foam I couldn't even venture a guess
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Old 02-13-2019, 08:46 PM   #4
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Laticrete also makes a 2 inch thick foam board. No wood framing needed. The foam is structural.
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Old 02-14-2019, 10:04 AM   #5
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Since Im still a liner man, I guess Id construct the 2 foam bench on top of the liner sitting on a little mud so any moisture that did make it through would still weep out. Im not concerned with water proof since my liner does all that and goes up the wall, just structure really. Guess Ill price out some foam board.

Shawn the way I construct my showers is the bench is always built within my pan/liner system. I do the liner up the walls where I know a bench will be, wont fasten below that point of say 24 on the bench wall. I then build the bench out of cinderblock within/on top of my liner. Water percolates through it to my liner and weeps normally. Im not really a fan of framing horizontal surfaces in a shower if I can help it.
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Old 02-14-2019, 12:44 PM   #6
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Youc an make your own or buy a foam one pre-made:
https://www.schluter.com/schluter-us...ements/benches
https://www.schluter.com/schluter-us...KERDI_BOARD-SB
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