Which materials do you use at the transition between cement board and drywall? You want the joint to be able to stand up to moisture, so you should use fiberglass tape instead of paper, and you should apply at least one coat of mortar. However, mortar is too coarse to finish the drywall side of the transition.

Can you use mortar for cement board joints?

Quote from the video:
Quote from Youtube video: This area right here what you wanna do is you want to take some of the thin set mortar you want to just put it on the teeth and then sweep it off so that you get a nice thin layer on the teeth.

How do you transition from cement board to drywall?





For best results getting a good finish between cement board and drywall, use a setting-type joint compound. This product produces a better finish over mesh tape than all-purpose joint compound. Apply 2–3 coats of joint compound to the seam between wall boards. Wait at least 24 hours between coats of joint compound.

How much space should be between cement board and wall?

1/4-inch

Leave a 1/4-inch gap between the backer board and the wall. Leave a 1/8-inch gap between each backer board sheet. The corners and edges of the sheets should not touch one another.

Can you put joint compound over cement board?

When using drywall compound over cement board, it is recommended, but not required, to use a faster setting-type joint compound (45 or 90 min), than typical joint compound. Make sure to follow manufacturer guidelines for the products used to finish the non-tiled area.

What do you put on cement board seams?





Use special mesh tape on seams



Cover all of the corners, joints and seams, including the joint where drywall and cement board meet, with the fiberglass mesh tape.

Does drywall mud stick to thinset?

thinset will stick to the drywall mud. Make sure you didn’t leave a hump at the seam, and try to position the tile so the seam runs near the middle, but definately not under a grout line. Watch out that the thinset doesn’t start drying too quickly as the mud will want to pull the moisture out of the thinset.

How do you transition from tile to drywall?

Quote from the video:
Quote from Youtube video: This you can either use sheet membrane. Like this rss sheet membrane or kerdi. And you would just cover the transition. Like so up to the black sharpie.

How do you tape cement board to drywall ceiling?

Quote from the video:
Quote from Youtube video: I would apply thinset and alkali resistant mesh tape then tile over the seams onto the drywall.

Does cement board go over drywall?



(Some cement board products may not require the underlying membrane if the seams are properly waterproofed.) 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.

How do you blend cement board and drywall?

Quote from the video:
Quote from Youtube video: Below and it'll explain what this is and everything like that. So what we want to do here is we want to actually want to use thinset because like i said we don't want to use drywall mud because it

Can I skim coat cement board?

Quote from the video:
Quote from Youtube video: As far as the hock goes. You can make one of these or the plywood I've done that before in a pinch just kind of a square piece of plywood put a handle on the bottom and I'll do that do the same job.

How do you fill a 2 inch gap in concrete?



Quote from the video:
Quote from Youtube video: Now if i have any large holes where voids are starting to form underneath the concrete. I do recommend some sand for that and filling those voids in before you seal off the top with the tremco.

What thinset do I use for cement board?

The cement board is then screwed into the plywood while the thin-set is fresh/wet. MAPEI recommends the use of MAPEI Porcelain Tile Mortar, MAPEI Large-Format Floor & Wall Tile Mortar or MAPEI Large Tile & Stone Mortar as thin-set under the cement board.

How do you fill gap between tub and cement board?

If you have a small gap (1/8 inch or less), a caulk can usually handle it. For gaps larger than that, you’ll need a good sealant. Apply sealant to both sides of your tub-cement board joint, then smooth it out with a putty knife. If a space is smaller than 1/4 inch, apply a single bead of caulk to the edge.

How do you fill gap between tub and drywall?

Quote from the video:
Quote from Youtube video: Everything needs something to bond to mix up some 20-minute speed set joint compound. And press it into the gap keeping it flush with the drywall.

How do you seal a large gap between a wall and a bath?



Quote from the video:
Quote from Youtube video: And cut a very small angle about an eighth of an inch off the top. You're going to cut it at about a 45 degree angle. Now taking your caulking gun go ahead and load up your caulk.

How do you caulk a 1/2 inch gap?

Quote from the video:
Quote from Youtube video: Okay so the things you're gonna need is some backer rod a putty knife a caulking gun and preferably some latex caulking. But this can be applied to actually filling any large gaps with caulking.

How big of a gap is too big to caulk?

A single bead of caulk can fill gaps up to 1/4 inch. If the gap is slightly larger than this, fill it with a bead of caulk deeper into the gap, but not flush with the surface. Wait until the caulk is completely cured before coming back to put a surface bead on.

How do you fill a large gap between tile and wall?

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. Make sure the gap is clean and dry, then squeeze a thin, even bead of caulk into the space.