Flooring Tile - Tile in Bathroom
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nbk3gz2
08-05-08, 11:25 AM
I wanted to install tile in my bathroom on the second floor; existing floor is plywood. Wanted to see if this is correct: a 1/4" backer board will be screwed down on top of the existing plyboard floor. Then I will lay down the tile with a thin mortar and finally grout. Is this sufficient?
What about the toilet; it is currently on top of vinyl flooring. I can simply remove it and place tile underneath with a new wax and wouldn't be any issue right? Or should I just leave the toilet as it and tile around it?
What about the toilet; it is currently on top of vinyl flooring. I can simply remove it and place tile underneath with a new wax and wouldn't be any issue right? Or should I just leave the toilet as it and tile around it?
HotinOKC
08-05-08, 03:24 PM
Hi, and welcome to the Forums!
There are a few things that need to be addressed prior to any tiling.
A deflection calculation needs to be done in order to see if your current floor joist structure is strong enough for tile. You will need your joist size (i.e. 2x8's), joist spacing (center to center) and unsupported span. Once you have those measurements, click here.
(http://www.johnbridge.com/vbulletin/deflecto.pl)
If your joists structure is good according to the above calculations, we then need to know how thick your current plywood subfloor is. Ceramic tile needs at LEAST 5/8" T&G plywood.
If the subfloor is good, then you can install your cement backer board in a bed of thinset AND screw it down.
There are a few things that need to be addressed prior to any tiling.
A deflection calculation needs to be done in order to see if your current floor joist structure is strong enough for tile. You will need your joist size (i.e. 2x8's), joist spacing (center to center) and unsupported span. Once you have those measurements, click here.
(http://www.johnbridge.com/vbulletin/deflecto.pl)
If your joists structure is good according to the above calculations, we then need to know how thick your current plywood subfloor is. Ceramic tile needs at LEAST 5/8" T&G plywood.
If the subfloor is good, then you can install your cement backer board in a bed of thinset AND screw it down.