Do you need to put anything under tile?

Siobhan Bierkortte asked, updated on March 23rd, 2022; Topic: how to tile
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#Tile may be strong, but it needs a solid, supportive base. An underlayment is the solid stabilizing layer directly below the tile and the tile adhesive (usually a thinset mortar). Using the wrong one can spell disaster for your tile installation.

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Otherwise, what goes between subfloor and tile?

On a plywood subfloor, you need either a layer of cement backer board or an underlayment membrane, like Custom Building Products' Wonderboard and RedGard, between the subfloor and tile for the thin-set adhesive to achieve a good bond.

For that reason, do you need cement board under tile? Whenever you're laying tile on a wood subfloor, you need to first install cement backerboard to prevent leaks and water damage that could harm your flooring and the structure of your home. Unlike wood or drywall sub-surfaces, cement backerboard will not rot, warp or grow mold and mildew when exposed to water.

Apart from this, what do you put down before you lay tile?

Underlayment is something you put on top of your substrate to prepare it for tiling. The substrate (or subfloor) is the ground, whether it's made of plywood or cement. Cement board or backer board are the most standard underlayments.

Can you lay tile directly on subfloor?

Tile can be laid on plywood. But do not install tile directly on the plywood subfloor itself. Use an intervening layer of a sheet of thinner plywood.

24 Related Questions Answered

Can tile be installed over tile?

So, in short, you can tile over tile as long as you're working on a fairly sound surface. The surface of the existing tile should be free of mold and mildew, completely level (including grout), and without any warping or strangely-placed tiles that might otherwise interfere with a smooth new layer.

Can I use cement board instead of plywood?

Cement backerboard is more stable than plywood in high humidity and other wet environments. It won't swell and buckle the way that plywood does, so it's safe to use in mudrooms and bathrooms where things like spills and puddles are normal, as well as in areas with high levels of moisture in the air.

Can you tile without backer board?

As long as a concrete slab is very flat and contains no cracks, tile can be installed directly on top, using thinset as the adhesive, allowing you to skip the backer board layer. If the slab is uneven or cracked, it must first be patched and leveled before tile can be installed.

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.

Where do you start laying floor tiles?

Begin laying tile in the center of the room and work your way out. The first step in laying out tile is to mark a guideline, or layout line, in the room to make sure your tile pattern is evenly centered. Measure the four walls in the room with a tape measure to find the midpoint.

Can you tile on drywall?

You can tile over drywall in areas that are not exposed to excessive moisture, and it is safe. It is not safe to tile over drywall in areas that are exposed to wetness like in the shower. ... In most cases, you'll be fine to tile over drywall.

How do you lay tile on a plywood subfloor?

What kind of floor can you put over ceramic tile?

Laminate flooring goes very well over ceramic tiles. It is a thin, solid flooring system that doesn't require adhesive, and comes with a padded underlayment that helps smooth out any contour from the ceramic. Laminate is a cheap, fast flooring solution that easily goes right over ceramic tile.

Can you lay floor tiles on top of floor tiles?

Tile can be laid over existing tile, as long as the floor is in good condition with no loose or broken tile. ... Clean Floor: Clean the floor to remove any grease or dirt.

Can you use 1/4 inch cement board on floors?

Both 1/4- and1/2-inch cement board are appropriate for floors. To install cement board on floors, cement board manufacturers mandate a 5/8-inch plywood subfloor or OSB underlayment.

Can durock be used as a subfloor?

Subfloor should be minimum 5/8" APA span-rated plywood or OSB with an Exposure 1 classification or better. Minimum 3/4" APA span- rated plywood or OSB with an Exposure 1 classification or better. Cover base with USG Durockβ„’ Brand Tile Membrane, 15 lb. felt or 4-mil polyethylene and attach with 1/4" galvanized staples.

Does cement board add stiffness?

Cement backer board does NOT add rigidity. By removing the top 1/2" plywood, the installer will be weakening the flooring system. The deflection rating of the subfloor construction (5/8" plywood over wood joists) may not be rigid enough to handle the removal of the extra 1/2" plywood.

How do you lay tile without cement?

Can you tile straight onto plywood wall?

Under British Standards BS 5385 Part 1, plywood is not a suitable substrate for the direct fixing of wall tiles, therefore when tiling onto walls, a tile backer board is required. However, tiling onto plywood overlaid floors is acceptable under British Standards.

Can you lay tile on OSB subfloor?

Can you lay tile over an OSB subfloor? You can lay tile over an OSB subfloor, but a membrane should be installed between the subfloor and the tiles to ensure a bond between the tile and the floor is made. ... Even if you are looking for a new subfloor to install, OSB is inexpensive and can work well with tile.

Do I really need thinset under backer board?

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.

Is thinset required 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.

Can you tile over old cement board?

Cement Board Ideally, tile should be installed directly on top of a surface like cement backerboard, which is stable enough to handle the tiles. Backerboard is typically nailed or screwed to the subfloor with taped seams and a thin layer of thinset for support and can be installed over old thinset.

Does backer board go under tub?

Placement of cement board undedr the tub is not necessary. In fact, place your tub on the subfloor but then install the cement backer right up to the tub. This limits lateral movement of the tub at the bottom of the skirt.

Do you put backer board under shower pan?

The wallboard must be installed 1/8 inch above the shower pan. If the shower pan is not in place, the wallboard height must be guessed, which can lead to inaccuracies and an expansion gap that is too large or too small.

Should you caulk between tub and tile?

Since you are joining two different materials together, you should use caulk in the space where the floor tile and tub meet. Grout is not flexible, so it's not the best material for the job, while caulk allows for movement and also provides a better sealant. ... As a home settles, however, grout can crack.

What is the difference between subfloor and underlayment?

The subfloor is the bottom most structure of the floor. It provides a flat and stable surface and supports the actual floor. Underlayment is different from the subfloor in that it rests between the subfloor and the actual floor.

What do floor layers do?

Floor layers are responsible for laying various floor coverings in all types of buildings and handling a variety of materials in the process, including carpet, wood, tile, cement, laminate, linoleum, vinyl, and rubber. This position is physical in nature, and the majority of work is performed in an indoor environment.

What goes over a subfloor?

Underlayment: Some types of flooring can be installed directly on top of the subfloor, such as vinyl flooring. Other types need a middle layer, called underlayment, such as laminate,carpet and tile.
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