Thinset is absolutely required on all hardiboard applications. As well as recommended by manufacturer. All sub floors have movement cementing the hardiboard will not allow the hardiboard to move seperate from the subfloor, it will strenghten the subfloor as intebded by the manufacturer.
Does hardibacker need thinset under backer board?
Cement board seams require mesh tape and thinset 1. No Thinset underneath the backer board Just the other day, I saw a video featuring someone fastening Hardibacker directly to the subfloor with nothing underneath it. I scrolled down to look at the comments and they did not disappoint. What were his replies, you ask?
Can you put thinset under Hardie board?
Since you are putting down hardie board on boards with small gaps, I would not recommend trying to put down thinset under it. It will make an enormous mess under the house (or whatever is under your bathroom). It is also more likely to make the floor uneven since it is hard to level thinset that is separated by gaps.
Do you need thinset under cement board?
Thinset Under Cement Board- Yes or No? Using thinset under cement board is a commonly skipped step amongst many contractors. We've heard of some contractors who have been installing for years and have never used a mortar under the backerboard arguing that if you use the correct screws and enough of them there is no need for it.
Do you have to use thinset under Durock?
However, many manufacturers including, both Durock and Hardiebacker not only recommend that you use thinset under their backerboard, but they specify it and will void the warranty on their product if it's not used. Proper installation would be to follow the manufacturers installation instructions for applying cement board to a subfloor.
Is it necessary to use thinset under Hardibacker?
However, many manufacturers including, both Durock and Hardiebacker not only recommend that you use thinset under their backerboard, but they specify it and will void the warranty on their product if it's not used.
Do you put thinset under backer board?
Use thin-set mortar when installing cement backer board. Thin-set dries slowly, allowing you to fix and readjust backer board sheets as needed. The ingredients in thin-set mortar ingredients are cement, fine sand and a water retaining agent.
Do you put thinset under cement board?
Not only is thinset a critical component underneath cement board but the other critical component is the fasteners. And you won't have the fasteners if you are trying to install it over concrete.
What goes behind Hardibacker?
Either is acceptable, but we recommend that the smooth side with the nailing pattern of every 8" on center go up. What subfloor should HardieBacker® cement board be installed over? The minimum subfloor specified is 5/8" exterior grade plywood or 23/32'' exterior grade OSB subflooring.
How thick should thinset be under Backerboard?
Plan for a layer of thinset 3/16-inch to 1/8-inch thick beneath your tile. A 3/16-inch layer of thinset will be enough for tiles with a smooth back to bond the tile to the floor or backer board.
What kind of thinset goes under cement board?
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 install HardieBacker cement board on the floor?
3:224:30How to Install HardieBacker Cement Board on Floors - YouTubeYouTubeStart of suggested clipEnd of suggested clipFor best results be sure to comb the ridges in one direction only twist. Or press and beat in tiles.MoreFor best results be sure to comb the ridges in one direction only twist. Or press and beat in tiles. Allow a minimum of 24 hours curing set time before grouting.
How do you secure cement backer board?
0:412:41How to Install Cement Backer Board for Floor Tile Installation - YouTubeYouTubeStart of suggested clipEnd of suggested clipSecure the backer board sheets with screws drilled every six to eight inches. Position the screwsMoreSecure the backer board sheets with screws drilled every six to eight inches. Position the screws one half inch to two inches from the edge of the sheets.
How do you secure cement board to the floor?
1:034:13Installing cement board subfloor & prepping for tile floor - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe subfloor cement board properly first you want to sweep the area. Now. Before you start we sweepMoreThe subfloor cement board properly first you want to sweep the area. Now. Before you start we sweep and we vacuumed the entire floor. But just go over quickly because that's where you walk in from
What goes behind backer board in shower?
Don't use paper-faced backer board, i.e., paper-faced drywall, behind seamed tub and shower enclosures. Use an alternate approved product such as fiber-cement, fiber-reinforced gypsum, glass mat gypsum, or fiber mat-reinforced cementitious backer panels.
What kind of thinset do you use for Hardibacker?
Latex or acrylic modified thinset (complying with ANSI A118. 4). Dry-set mortar for use between subfloor and cement board only (complying with ANSI A118.
Can cement board be attached directly to studs?
Walls: For highly wet areas, such as showers and bathtub surrounds, cement board typically is attached directly over the wall studs, although the studs may be covered with an intervening moisture membrane. (Some cement board products may not require the underlying membrane if the seams are properly waterproofed.)
How do you apply thinset to backer board?
0:182:41How to Install Cement Backer Board for Floor Tile Installation - YouTubeYouTubeStart of suggested clipEnd of suggested clipApply thinset between the cement board and the subfloor. With the flat side of a quarter inchMoreApply thinset between the cement board and the subfloor. With the flat side of a quarter inch notched trowel spread enough thinset for one sheet of backer. Board.
How do you secure cement backer board?
Position each piece of backer board in the thin-set, press in place, and attach using special backer board screws on the spacing recommended by the backer board manufacturer. Cover the joints in the backer board with fiberglass tape embedded in thin-set adhesive and allow to set before tiling.
How thick should cement board be under tile?
Floors: A 1/4-inch minimum thickness is needed, but thicker panels are also fine. Walls: Use 1/2-inch or 5/8-inch-thick cement board, not 1/4-inch. The extra thickness is needed when spanning the studs and it provides a solid base for the tile.
How do you lay Hardie backer board on the floor?
3:284:30How to Install HardieBacker Cement Board on Floors - YouTubeYouTubeStart of suggested clipEnd of suggested clipFor best results be sure to comb the ridges in one direction only twist. Or press and beat in tiles.MoreFor best results be sure to comb the ridges in one direction only twist. Or press and beat in tiles. Allow a minimum of 24 hours curing set time before grouting.
Can you leave tile alone?
Since the tiles are set, I guess I would leave it alone because remo ving it now will leave you with a 100% lose of the materials. You might get lucky and just get hairline cracks which may not be visible when standing? Worse case is rip it again in a few years, your choice.
Can underlayment be fastened to joists?
Underlayments, as you can gather, should not be fastened to the joists, just to the subfloor. This helps isolate any joists movement from the underlayment.
Is cement board installation difficult?
Cement board installation is not something that is incredibly difficult.
Can cement board be used to stiffen up a floor?
Hint: cement board should never be counted on to stiffen up your floor. The floor needs to meet minimum requirements for tile BEFORE any tile backer board is installed.
Is thinset a critical component?
Not only is thinset a critical component underneath cement board but the other critical component is the fasteners. And you won’t have the fasteners if you are trying to install it over concrete.
Do screws take the place of thinset?
Additionally, screws don’t take the place of thinset either . I talk more about screws in #3.
Can you use liquid nails as thinset?
Also, I know some are wondering but, no, Liquid Nails does not count as a thinset replacement. We have to remember that this isn’t the same as installing plywood. Cement board is a different product and it needs to be installed in its own way.
Can you use mesh tape on cement board?
Not using Mesh Tape on the Seams of your Cement Board Installation. This is more of a little known fact but most cement board manufacturers want fiberglass alkaline-resistant mesh tape embedded in thinset mortar over the backer board seams. Mesh Tape: Don’t Skip this Step.
Can you put cement board over concrete?
If you have a concrete subfloor then you should not be contemplating installing cement board over it.
How long to mix thinset mortar?
(and if "Handyman Pete who keeps being a harda** about his "years of experience" tiling shows up with a bucket of that pre-mixed mortar for anything other than a backsplash, push him out the door and lock it immediately!) On any bag of thinset will be the part where it says usually to mix it for several minutes, then let it stand for usually 10 min or so, then mix it a second time for maybe 3 to 5 minutes. For whatever reason this is, according to the REAL pros and the manufacturers, it is VERY important to follow those directions, even though if you simply mix it for a few minutes and skip the rest, the mortar seems no different to work with than if you follow the directions correctly, even if it seems like a waste of time. Apparently though, those extra steps are crucial to getting the right results, which should be a tile job you can come back to in 10, 20 or even 50 years and it still looks great!
What is the purpose of backer board?
The purpose of backer board on a floor is to create a monolithic substrate... one continuous mass that moves as one, rather than individual sheets that can expand and contract individually. The backer is set with at least 1/8" gaps between sheets to allow enough room for thinset to 'glue' edges while fiberglass tape on joints knits them together. By itself this joint is strong, however it is the thinsetting of the backer board to the subfloor that locks the joints together creating the monolithic substrate.
Is a thinset required on a floor?
Thinset is absolutely required beneath backer-board on a floor.
Can I use thinset under cement board?
I have never used thinset under the cement board either. The critical issue is when there is a gap between the subfloor and the underlayment. It will bounce and then the grout tends to crack. I always make sure I use the appropriate screws for the installation and make sure it is screwed down REALLY well. Special screws are made for this application and are coated and the threads are course for the best grip.
Can Durock be attached to a thinset?
Both durock and hardibacker specify it should be attached to the floor with thinset. You should have addressed this with your contract, because its a commonly skipped step.
Can you thin set cement backer board?
Typically I will follow manufacturers recommendations but I will not thin-set under cement backer board. If you have ever tried removing thin-set installed backer board then you will know why. You will be taking up the floor down to the floor joists if you ever want to remodel.
Can you use a thin set on a hardie backer?
Putting a lot of screws in can negate the need for the thin set. Thin set is probably only essential for thin strips of hardie backer or thin sub flooring. If they are screwed down with the proper screws every spot on the hardie backer, (6"??) it should be fine.
