HomePopular Question ➟ 0 Does cement board go over tub flange?

Does cement board go over tub flange?

ANSWER – No there should not be a gap between the top of the bathtub flange and the backer board on the wall. 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.

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.

Similarly, how do you fill gap between bathtub and wall? Fill gaps up to 1/4 inch in width with caulk. If you have tile on the wall adjoining the tub, select a caulk that matches the color of the grout. If your gap is smaller than 1/8 inch in width, use regular caulk; fill gaps larger than 1/8 inch with a sanded caulk.

Moreover, should cement board go under tub?

You don’t need any cement board under the tub. It is far more important to have a sturdy layer of ply under the tub.

How do you cut backer board around toilet flange?

How to Cut Cement Board Around a Toilet Flange

  1. Measure the size and location of the toilet flange.
  2. Create a homemade cutter by inserting one of the screws close to the end of the piece of wood and screw it all the way through the center point on the cement board.
  3. Insert the other screw about a ½ inch further from the center screw than the radius of the flange.

Do I need a vapor barrier behind cement board in shower?

You still need a vapor barrier with cement board, although in this case the barrier can go behind the board. Cement board is heavy enough and breathable enough to take the moisture without a problem. By having the vapor barrier behind the cement board you stop the moisture going further into the wall.

Can I use deck screws for cement board?

There are screws made for concrete board. Bugle head like drywall screws but they are coated to resist corrosion and have sufficient strength to support the board. The heads are larger than deck screws or drywall screws, too. Rona, HD, HH will all have them.

Do you have to waterproof cement board?

Most concrete backer-boards on the market today are not water-resistant, but all are waterproof. Since many people confuse the terms, it is a common misconception that this is the best material for use inside a shower or tub area.

Can you put cement board over drywall?

Because cement board can be used either for floors or walls, the surface below the cement board will vary: In such wet areas, never install cement board directly over drywall or green board. Instead, first, remove the existing surface material, then install the cement board over the studs and membrane, as applicable.

Can you paint cement board?

Using a paintbrush or paint roller, apply the paint on the surface of the cement board. For best results, apply thin layers to the surface of the board, and let each layer dry before applying another one. If any bubbles or cracks occur, stop painting, strip the surface, and re-apply the cement primer.

How much space should be between cement board and tub?

There should be a 1/4″ gap between the tub ledge and the backer board. Technically, after the tile is installed over the backer board that gap between it and the tub ledge should be filled with an ASTM C920 sealant (caulking e.g. silicone).

Does subfloor go under bathtub?

Flooring repairs can be intimidating, but the subfloor under the tub generally consists of plywood secured over floor joists and is fairly simple to replace — once you get access to it. The entire tub unit requires removal before subfloor replacement can begin.

How do you cut cement board?

The simplest way to cut cement backer board is to score the surface and snap the sheet along the scored line, similar to the way you’d cut drywall. In fact, you can use a drywall utility knife to score backer board, but a better option is a carbide-tipped scoring tool.

How do you replace a subfloor in a bathtub?

Take out the rotten floor under your bathtub. Disconnect pipes of the bathtub. Remove the tub from the walls between which it is sandwiched. Measure the area where you need to replace the rotten floor. Cut away the damaged area. Remove the damaged flooring. Clean the area where you will install new floors.

Does cement board wick water?

If you use cement backer board, you have to install a separate moisture barrier between the board and any wood it’s attached to. Since the concrete can absorb and wick moisture, the barrier prevents wood rot if the backer board gets saturated with water.

Should I tile shower floor or walls first?

Tiling the Wall First At least, that’s what many tilers believe. And, after installing the floor tile you can install that final, or first, row of wall tile. Or, fill the gap with grout. Additionally, you can also cut the tile to fill the gap between floor and wall.

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