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awesomerOhYa 11-06-2013 05:58 AM

Bathroom reno
In a mobile home what thickness of sub flooring do I need, I want to tile my floor and tub surround and the wall surrounding the tub to the floor, along with a back splash at the vanity. Just simple and basic yet very noticeably modern and inexpensive

CallMeVilla 11-06-2013 02:00 PM

The issue is not the "mobile home", it is the performance of the subfloor. Light weight subflooring needs to be stabilized to prevent flexing ... which leads to cracking of grout and tiles.

Others may have more experience, but for the floor I would use 1/2" Hardie Board and make sure you rigorously follow the screw pattern they require. Same goes with the gap and taping.

For the backsplash, and vanity, water proofing will be important too. Hardie Board with sealant (RedGuard or Dragon Shield) applied to the corners. You might want to call the Hardie people and get their input too.

Sounds like fun ... Good luck

nealtw 11-06-2013 07:19 PM

Welcome to the site, this covers your question really well. For the step build it out of demensional lumber like 2x4s and cover with plywood and then concrete board

CallMeVilla 11-06-2013 09:27 PM

Neal's catch is excellent ... They recommend what I suspected -- apply a new subfloor PLUS the Hardie Board. That will build up uour floor height so pay attention to this ...

Drywallinfo 11-07-2013 06:15 AM

I have used 1/2" Durock (similar to Hardieboard) over my plywood subfloor under all my new tile and have yet to have any grout or tile cracking. It will also give you a much more solid stable finished floor. I used thinset under my Durock and also screwed it down. Yes, and as mentioned, you may have to adjust some things for the new floor height - for my bathroom it is was simply a matter of sawing off 3/4" from the door bottom, but for my kitchen it was a little more involved.

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