The Hardibacker or cement board should overlap the tub flange down to about ¼” to ½” above the tub itself. Then bring your tile down to around ⅛” from the tub and finally caulk that joint for a good seal. The way you have it now will fail and allow water between the backer and tub and into the framing.
How do you fill the gap between backer board and tub?
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). Although some say you should have weep holes along this gap so any water behind can weep out into the tub.
How do you shim Hardibacker?
Quote from the video:
Quote from Youtube video: So you cut down on the dust. And then you mix it up with a margin trowel you want a fairly thick consistency such that it doesn't fall off the margin.
How do you shim backer board?
Quote from the video:
Quote from Youtube video: You want it as flat as possible. So if you put get get your your backer board and you just throw it to the walls. If once that is in and once that is that you're gonna cause a wave in the wall. And
How do you install concrete 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.
How do you install Hardie board?
Quote from the video:
Quote from Youtube video: Your Hardiebacker cement board with nails or screws every 8 inches on center over the entire surface. Keep screws between 3/8 inch and 3/4 inch from board edges and 2 inches from board corners.
How do you fix a big gap between tub and floor?
Closing the gap between tub and floor tile the correct way
- Step 1: Measure the gap between tub and floor tile. …
- Step 2: Pick the right caulk. …
- Step 3: Assemble the caulk gun. …
- Step 4: Apply the caulk on the gap. …
- Step 5: Smooth out the caulk using your finger. …
- Step 6: Give some time for the caulk to dry.
Can you wet Shim cement board?
Quote from the video:
Quote from Youtube video: Where you would want to wet shim. This can only be done with your foam backer board not your cement backer board the best type of thinset to use for this method would be a modified rapid set thinset.
Can you wet Shim wedi?
However, not every backer board can be wet shimmed. For example, Wedi doesn’t (for now) allow wet shimming of their building panels. Schluter, on the other hand, allows their KERDI-BOARD to be wet shimmed all day long. The first step is to mix thin-set mortar to a thick consistency.
How do you level uneven backer board?
How to Repair Uneven Cement Boards
- Provide support behind seams that run parallel to wall framing. …
- Use extra fasteners on seams that are separating. …
- Repair uneven seams with mortar. …
- Sand the seam lightly with 100-grit sandpaper to knock down obvious ridges and uneven areas.
How do you install backer board on a tub surround?
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 Hardie backer board be used in a shower?
Installing cement backerboard is one of the more popular choices for a shower wall substrate. Cement backerboards include Hardiebacker, Durock, Fiberboard, wonderboard, and similar products. These materials bridge the gap between expense and effectiveness.
What goes behind cement board in shower?
Use an appropriate waterproof or moisture-resistant backing material behind grouted tile or stone or segmented plastic or fiberglass tub and shower surrounds. Appropriate materials include cement board which has a cementitious core and glass mats on both sides to strengthen the board.
How thick is Hardibacker board?
1/4 in. thickness provides strength and ease of use in flooring or countertop projects in bathrooms, kitchens and laundry rooms.
Can you tile right over cement board?
There is no need to install backer board on a concrete substrate—ceramic tile can be applied right over concrete, provided the surface is flat, smooth, and free of significant cracks.
What is the best backer board to use in a shower?
Cement board is a good, reliable backer board that works well on both floors and walls. Keep in mind that most tile setters err on the side of caution and brush a waterproofing membrane on top of cement board when it is in wet areas like showers or tub surrounds.
How do you waterproof Hardie in a shower?
Quote from the video:
Quote from Youtube video: That you put the fiber mesh tape just like this itself sticking. So just lay it on all the seams. And you're going to seal it permanently with a towel mortar with a polymer base.
Is Hardibacker good for shower walls?
1/4″ hardibacker alone is an unsuitable substrate for shower wall tile. If it were attached to properly waterproofed drywall, plywood, or plaster it would be fine. Think about it, one wayward elbow, knee, or hip bump and you may get flexion which would cause the grout (or tile) to crack.
How do I waterproof my shower walls before tiling?
Quote from the video:
Quote from Youtube video: For the main shower wall and floor surfaces. Apply the first coat of towel sure proof to the dry primed surface with a short hair enamel paint roller or brush. And allow to dry.
Is Hardibacker waterproof?
HardieBacker® Cement Board with HydroDefense™ Technology is a long-lasting, waterproof solution for walls, floors, and countertops.
Is Backerboard waterproof?
Most brands of concrete backer-board consist of a fibrous reinforcement cement composition molded into sheets. It is extremely hard and waterproof, meaning it will not deteriorate over time when exposed to water, making it ideal for use in high-traffic areas that are susceptible to the adverse effects of moisture.
