Table of Contents
An unmodified thinset (Masterblend) is fine between the Hardi and the subfloor. Tara, The reason for the layer of thinset between the cement board and the subfloor is to fill the voids/gaps between the two. It’ll keep the cement board from moving up and down.
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. 1).
Does cement board need thinset under it?
Using thinset under cement board is a commonly skipped step amongst many contractors. 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.
What kind of joint compound do you use on cement board?
Just finish it with a setting-type joint compound, which comes in 25-lb. bags of powder that you mix with water. (It’s available at home centers.) Setting-type compound is stronger and more water-resistant than the type that hardens by drying.
What is the difference between durock and Hardibacker?
Durock is a reliable cement product that contains glass mesh. It is the heavier of the two materials, which means it is more difficult to use and maneuver. 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.
Do you have to put thinset between subfloor and cement board?
If you have a concrete subfloor then you should not be contemplating installing cement board over it. 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 do you do with a gap between tub and cement 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). Although some say you should have weep holes along this gap so any water behind can weep out into the tub.
Can I just screw down cement board?
Screw and Joints Do not use drywall screws as they are not recommended to be used to hold the backer board in place. All of your backer board pieces should be cut before they are placed on the floor. It is important to highlight that screws shall not be installed all the way down to the floor joists.
Can you use all purpose joint compound on cement board?
Things You’ll Need Durock Cement Boards are a type of drywall reinforced with cement for a harder surface. This type of wall material can be finished just like ordinary drywall, using joint tape and joint compound.
How do you fill gap between cement board and drywall?
Cut wall materials precisely, to keep seams small. Use self-adhesive mesh tape where drywall and cement board meet. Spread 2–3 coats of setting-type joint compound over the seam, waiting 24 hours between coats. Sand the joint to smooth it, beginning with semi-coarse sandpaper and finishing with fine sandpaper.1 day ago.
Does it matter what color thinset I use?
The choice of thinset color is totally dependent on the color of the tile. A dark-colored tile, flagstone or slate looks best set with a gray thinset. If any of the mortar shows through the grout, the color is less apparent.
What is the difference between large format thinset and regular thinset?
With traditionally sized tile installations, thinset is used to bond the tile to the substrate. With large format tiles that often have a 1/4″ (6mm) thickness, regular thinset can be problematic. As it shrinks and hardens, the thinset pulls on the tile and can result in damaged tiles.
Is thinset and mortar the same?
Thinset, while it is also sometimes referred to as a “mortar” is an adhesive. It’s a mix of cement, water, and fine sand. It holds your tile to the substrate and is used in commercial applications, “wet wall” applications (such as a shower floor), or with heavier tiling materials such as Ankara Travertine Stone Tile.
Do you use thinset under backer board?
Spread Mortar 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.
Can you use 1/4 inch cement board on floors?
1/4″ USG Durock® cement board is an ideal substrate for floor and countertop ceramic tile installations. The 1/4″ thickness helps eliminate transition trim when abutting carpet or wood flooring and minimize level variations with other finish materials.
Can you Durock 1/4 walls?
3 Answers. 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.
Which is better backer board or cement board?
Cement board is the most common and widely-known backer board. On the downside, the cement boards are heavy, somewhat difficult to cut and can leave abrasive sandy crumbs that can damage tubs and shower bases if you’re not careful. Cement board is a good, reliable backer board that works well on both floors and walls.
Is Durock the same as cement board?
Durock and Hardiebacker are two different brands of cement backer boards used in rooms that are susceptible to moisture buildup. While both of these brands offer products that are highly raved about by users, each brand does have their own features that set them apart from each other.
Can I screw cement board to subfloor?
Cement board can be installed over a plywood subfloor using an appropriate construction adhesive and screws for a quicker project that’s less messy than taping and mudding.
