Flooring Tile - Tiling bathroom floor - need advice
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RaeNZ
06-13-05, 12:40 PM
OK so I am challenged with the terminology so bare with me.
I have stripped all the layers of lino. and am down to the wood floor. This is not tongue and groove - but just wood strips. In the area around the toilet and bath this has been replayed with plywood. Below that is the ?1x4's that are layed in a diagonal - is that the subfloor?
OK my questions are several -
1. Do I need to remove everything down to the subfloor (being the diagonal boards?) and lay the cement board on top of the subfloor?
2. Do I tile right in under the bath, then place the bath on top of the tiles, or place the bath then tile up to the bath?
3. This is a 80 year old house, and the floors are a little bit wavy - the bathroom isn't too bad - do they need to be perfect perfect perfect before Iput the cement board down, or is a dip of a millimeter not going to be a problem?
Thanks from a novice - who is a quick learner, and wants to do it right the first time!
Rae
I have stripped all the layers of lino. and am down to the wood floor. This is not tongue and groove - but just wood strips. In the area around the toilet and bath this has been replayed with plywood. Below that is the ?1x4's that are layed in a diagonal - is that the subfloor?
OK my questions are several -
1. Do I need to remove everything down to the subfloor (being the diagonal boards?) and lay the cement board on top of the subfloor?
2. Do I tile right in under the bath, then place the bath on top of the tiles, or place the bath then tile up to the bath?
3. This is a 80 year old house, and the floors are a little bit wavy - the bathroom isn't too bad - do they need to be perfect perfect perfect before Iput the cement board down, or is a dip of a millimeter not going to be a problem?
Thanks from a novice - who is a quick learner, and wants to do it right the first time!
Rae
Tileguybob
06-13-05, 08:12 PM
If you can get down to those 1x4s you need to put a 1/2" layer of BC grade ply down screwed into the boards and not the floor joists (this helps to isolate any movemnt away from the tile if the subloor moves), then set the 1/4" cement board in a bed of thinset and use 1&1/4" galvanized roofing nails to set the cement boards. All this assumes you are putting down ceramic or porcelain tile, not real stone like marble or granite. Can you tell what size your floor joists are (2x8, 2x10?), what is the gap bewteen them (16" on center?) and the length of the unsupported span of the joists. Need to know to make sure the floor does not sag or bounce, this will cause the tile to come loose or crack.
I would run the plywood and cement board under the tub if you have that option, at least run the plywood under, then tile up to the tub.
When you put the cement board down into the combed bed of thinset(using a 1/4" notched trowel) that will take some of the waviness out of play. If a slope still exists you can leave it or fill the low area with Self Leveling Cement, poured on top of the cement board. May need a primer to go with the SLC
I would run the plywood and cement board under the tub if you have that option, at least run the plywood under, then tile up to the tub.
When you put the cement board down into the combed bed of thinset(using a 1/4" notched trowel) that will take some of the waviness out of play. If a slope still exists you can leave it or fill the low area with Self Leveling Cement, poured on top of the cement board. May need a primer to go with the SLC