Does backer board go over plywood?
When you come up against plywood subfloors in the bathroom or other areas of the home, a cement-based backer board must be installed on top of the wood. This provides the tile with a proper installation surface to bond with, offering you the lifetime guarantee that a good tile installation will always provide.
Do you need plywood under cement board?
Because cement board can be used either for floors or walls, the surface below the cement board will vary: Flooring: For ceramic tile floors, the cement board usually rests on a plywood subfloor (minimum 5/8-inch-thick exterior-grade plywood or OSB).
Do you put cement board over tub flange?
The backer board should overlap the tub flange so the tile has a stable backing to attach to. This requires shimming the backer board out from the studs so the wall is plumb. There should be a 1/4″ gap between the tub ledge and the backer board.
Does backer board go over tub lip?
The best approach when installing cement board or other tile backer around a tub is to keep the cement board out of the lip area. Apply it to the wall with the bottom edge about 1/4 in. above the lip of the tub. Then apply a generous amount of thin-set to the bottom bathtub tile and position it 1/8 in.
Can you put tile directly on plywood?
Tile can be laid on plywood. But do not install tile directly on the plywood subfloor itself. Use an intervening layer of a sheet of thinner plywood.
Can you put cement board over plywood?
If you’re working over a wood subfloor, cement board is the right choice for your tile base. No matter what you’re told at a home center, it’s not a good idea to install tile directly over plywood, especially in a damp area like a bathroom.
Can you use cement board instead of plywood for a subfloor?
When properly installed with a coat of thinset beneath it, cement backerboard won’t flex like plywood, and won’t contribute to problems like lippage. This makes cement backerboard a good choice for large format tile floors, as well as for older homes that may have more uneven subfloors.
Should I use cement board or plywood?
Generally speaking, if you are laying tile on top of it, then cement board is the better option. However, for wood and other types of floors, it is plywood that is generally the preferred choice.
Can I just screw down cement board?
Doing this will require that you remove the existing surface material before installing backer board over the studs. Cement board can also be used on countertops when laying tile. However, the process will involve using an extra sheet of backer board. Never use standard screws when installing cement board.
How do you install backer board around a bathtub?
Quote from the video:
Quote from Youtube video: So if you using kerdi-board or if you do rock or some other cement floor. You're gonna sit the board on the tub deck. You're gonna leave a little gap. And then you're gonna seal that Wow.
What do you put between tub and tile?
Caulk provides a waterproof seal where tile abuts other materials, such as bathtubs, sinks, or walls. A carefully run line of caulk (known as a bead) in these areas adds a finished touch.
Do you need vapor barrier behind cement board?
If it’s a cement board, you need a vapor barrier, because cement retains moisture, which means the wood next to it is always damp. It does retain moisture, but the advice given by others here is to move the waterproofing between the tile and cement board with products like Redguard or Ditra.
Will thinset stick to plywood?
Plywood and the flooring to which it is attached must be at least 1 1/8 inch thick to support the weight of thinset and tiles.
Do I need to prime plywood before tiling?
In general, if the subfloor for tiling is made up of plywood, you don’t have to use a primer. Instead, the plywood preparation is done so that it is made water-resistant and more adhesive suitable without using a primer.
Is uncoupling membrane necessary over plywood?
Although some substrates absolutely require uncoupling membranes, they can be installed on a range of surfaces, including cement mortar, backerboard, OSB, and plywood. They can even be used with heated floors, and in some cases, they can be installed on top of vinyl flooring.
Should I PVA plywood floor before tiling?
Short answer. No, never use PVA to prime a surface before applying tiles. The acetic acid produced when cement and PVA come into contact would render the adhesive and grout useless.
How do you tile over plywood subfloor?
Quote from the video:
Quote from Youtube video: Should be nailed or screwed every eight inches in the field. And every six inches around the perimeter. The nails themselves should be long enough to pass through both layers of underlayment.
Is uncoupling membrane better than cement board?
Backer boards are made of concrete and fiberglass mesh, and must screwed into the subfloor to secure it. Because it’s screwed down, it can’t provide crack protection like uncoupling mats. Because of their makeup, uncoupling mats are faster and easier to install.
What’s the difference between cement board and Hardibacker?
HardieBacker is much more light, and it is also the best selling brand of cement board available. It is much cleaner because it does not have any glass in it. It allows for a smooth job with minimal mess. As a bonus, HardieBacker board has an EZ Grid pattern so you can cut perfect lines.
What goes between tile and subfloor?
Exterior plywood is an acceptable underlayment for tile and is preferred to interior-grade plywoods because the bonding adhesives used are waterproof. If water seeps through the tile installation to the underlayment, it will not cause the wood to swell, as happens with interior-grade plywood.
