Leveling a wooden plank floor to install tile, for dummies.
Thanks for everybody's help on my last bathroom design question. I've decided to do it the easy way, and just tile the floor and then install a clawfoot tub. I was hoping to get a little help with the floor tile.
My subfloor is wood planking. It's something like this
, except without gaps between the planks or holes in them. It slopes toward a center point, losing about 1" in height over a 30" distance.
What I want to do is to use some sort of self-leveling concrete to fill this, but can you use self-leveling concrete over wood planking? For instance, it sounds like this product
(pdf) could be used over wood, with some mesh. Then, this
product recommends I put down plywood first, then use the leveler on top of it. But what about little dips underneath the plywood? Is there no risk of bending and cracking there? Then, elsewhere I hear that any self-levelling concrete over wood will crack when the wood expands and contracts. This house was built in the 1890s, so I'm guessing this wood planking is pretty old. I would prefer not to tear it out and put down plywood or somehow level the joists.
My plan was to level the floor with some sort of self-levelling compound, screw down 3/4" plywood, then Ditra
, then tile. I have about 1" from the high point of the floor to the surface of the adjacent room's floor. Ideally, I'd use something that could be brought to a feather-edge at the floor's high-point, but at this point, I don't care if the floors are slightly different elevations. StickyCarpet's approach here
is my new backup plan.
Thanks for any suggestions.