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Unread 02-13-2013, 07:56 PM   #1
scott-wisc
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Scott's Main Bath Remodel

So I'm gutting the master bathroom in my house and moving a couple of walls to increase the size. I'm installing tile on the floor and a tile shower using Kerdi. I need to patch a couple of areas of the 1/2" plywood then most of the 5/8" underlayment. Do I just use underlayment particleboard? Is 1/4" CBU okay for the floor? Can I build the mud preslope on top of the particleboard once the shower is framed?
Thanks, Scott
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Unread 02-13-2013, 08:02 PM   #2
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Scott, the particle board needs to go and if you need to remove some of the bad ply then you may as well install a new layer of 3/4'' T&G plywood.....Assuming you checked the defecto calculator above.
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Unread 02-13-2013, 08:08 PM   #3
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5/8 plywood is the bare minimum with 16" OC joist spacing. If your joists are wider, you'll need thicker plywood. Use nothing less than CC grade plywood if you can find it. Round these parts BC plywood is a lot more common.
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Unread 02-13-2013, 08:10 PM   #4
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Scott typically those builds were 1/2" plywood then 5/8" particle board over 16" on center 2x10's that spanned a bit to far.
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Unread 02-13-2013, 08:33 PM   #5
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Scott,

Just went through these same issues (or similar). You can see what I did to strengthen the floor in my thread starting on page 4.(http://www.johnbridge.com/vbulletin/...=105151&page=4).

I would follow Brad's advice and rip all of the subfloor out and replace with 3/4 T&G. I messed around for a while trying to fix my bad floor before I did a full replacement. Also added joist sisters to level and strengthen the floor. The work didn't take that long and the structure is much stronger and ready for the CBU & tile

Good luck.
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Unread 02-22-2013, 07:33 PM   #6
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Guess Scott has left the building.....
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Unread 04-02-2013, 09:01 AM   #7
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Door Opening Size

I'm about to frame out the shower wall with the door opening in it. What should the finished width be? I won't be buying the door until next year, so I need to know what a common size would be, say for a 30"ish door.
Thanks, Scott.
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Unread 04-02-2013, 09:28 AM   #8
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Scott, buy the door now and make the opening the right size for it. Making a "30"ish" opening may require you to buy a custom door to fit. Buying a "30"ish" door now will allow you to make an opening into which it'll fit.

Either your shower subfloor or your bathroom subfloor is installed in the incorrect orientation.

My opinion; worth price charged.
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Unread 04-02-2013, 10:51 AM   #9
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Scott, You might look at the Kohler shower doors sold at HD and Lowe's. These doors come in a range of widths with a couple of inches of adjustment for each width.
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