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Unread 02-26-2011, 02:10 PM   #1
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Location: Hudson, WI
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Brian and the Master Bath Remodel

Can't thank everyone enough for all of the knowledge and tips on this site!

I've been lurking the forums and library for awhile. I'm also reading the Tile Your World Book and the Kerdi Shower Book. I even have a recording of the Kerdi install on Ask This Old House. So I feel pretty confident in undertaking our master bathroom remodel. I've also tiled a backsplash before, so I've got a little experience with tile.

So what I'm planning to do is take out old fiberglass shower/bath. Put in a tile shower with Kerdi lining and mud pan. And after that's done, tile the bathroom floor. As well as some other improvements to the counter tops, sinks, toilet, etc.

The reason I started this thread is to be able to ask questions and just be reassured that I'm on the right track.

Here are some of the details and plans for the shower-
size is 58" x 30"
3/4" plywood sub floor with crawl space underneath
2x10 floor joists, 16" OC
will use 6.5" glazed porcelain tile on the shower walls
not sure yet on the shower floor, probably 2x2
small corner foot bench
a couple corner shelves
either a single glass partition with open door or sliding by-pass doors -not sure yet
kerdi membrane over drywall
mud pan

Here's what I've got so far-
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Unread 02-26-2011, 02:34 PM   #2
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Welcome aboard Brian,

Looks like you're on the right track so far... showing up here I mean. Didn't see the joist span in your list??

Keep all your questions in this thread so we can follow along and not have to ask the same background questions as you progress.

"the road to hell is paved with osb, mastic, pre-mixed latex 'grout' or 'thinset', "
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Unread 02-26-2011, 03:12 PM   #3
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If you are fixin' to kerdi the shower walls, then there should be no plastic sheeting behind the kerdi'd areas

For when DIY isn't such a good idea...
Houston TX area Kitchen & Bath Remodeling

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Unread 02-27-2011, 10:14 AM   #4
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Thanks for the reminder on the plastic, I had just left that there during the tub and drywall removal.

I thought the span was around 10' but hadn't measured it till now. Joist span is 16'. Uh-oh, deflectolator doesn't give thumbs up. Does it help if two sides of the shower are on foundation walls?
Here's a look from below.
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Last edited by BHudson; 03-01-2011 at 06:56 AM. Reason: clarification
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Unread 03-05-2011, 12:16 PM   #5
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Please help better understand this deflection rate better. How does Douglas Fir fit into the equation? And how would 3/4 inch subfloor factor in?

Deflecto results-
For joists that are SYP or Douglas Fir, in good condition, 9.25 inches tall, 1.5 inches wide, 16 inches on center, and 16 feet long between supports, the deflection calculated is 0.715 inches.

This translates to a deflection of L / 269.

Since the maximum deflection for tile is L / 360, and for natural stone is L / 720, your floor is rated for Sheet Vinyl or wood.
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