Quick Answer: Do I Need Cement Board Under Floor Tile?

What is the best underlayment for tile floors?

Exterior-Grade Plywood Exterior plywood is an acceptable underlayment for tile and is preferred to interior-grade plywoods because the bonding adhesives used are waterproof.

If water seeps through the tile installation to the underlayment, it will not cause the wood to swell, as happens with interior-grade plywood..

Can you tile directly on plywood?

While tile can be laid on plywood, do not install tile directly onto the plywood subfloor itself.

Which side of cement board goes up?

Cement board has a smooth side and a rough side. Face the rough side out if you will be using thin-set mortar adhesive to install the tile but the smooth side out if you will be using latex mastic.

Do you need a moisture barrier under tile?

A moisture barrier is need to protect the flooring against moisture or moisture vapor. … Floating Floor Installations – When installing laminate or other floating floors over cement, VCT, ceramic tiles, or kitchen vinyl, use 6 mil poly sheeting plastic as the moisture barrier.

What do you put down before 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 I tile directly on concrete?

Tile cannot be attached directly to painted concrete, as the thin-set will not adhere well to the paint. Painted concrete can be made porous with sandblasting or other hard abrasive actions. While you can install tile directly on concrete, problems erupt when the concrete cracks or shifts.

Is cement board needed for floor tile?

If you’re working over a wood subfloor, cement board is the right choice for your tile base. No matter what you’re told at a home center, it’s not a good idea to install tile directly over plywood, especially in a damp area like a bathroom.

How thick should cement board be under tile floor?

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 to span the studs and provide a solid base for the tile.

Can you just screw down cement board?

Put thinset beneath your backerboard. And put your dog out. Once you have the area fully covered with thinset you can lay your backerboards into the bed of thinset and screw it down. DO NOT use drywall screws!

What kind of Thinset goes under cement board?

Use thin-set mortar when installing cement backerboard. Thin-set dries slowly, allowing you to fix and readjust backerboard sheets as needed. With the smooth side of a 1/4-inch notched trowel, spread enough mortar for one sheet.

Do I need an underlayment for tile?

Underlayments are the support materials that lay underneath your tile on a floor. … They provide a water-stable base, make the floor more rigid (less chance of cracked tiles), and are better suited for tile adhesion. A well-set tile on a sturdy underlayment should never crack, and will last for decades.

What kind of subfloor is needed for ceramic tile?

The subfloor under the tile should be at least 1 1/8″ thick, with a minimum of 5/8″ thick exterior grade plywood topped by 1/2″ cement backer board.

Can you tile directly on subfloor?

While you can lay tile directly over a concrete slab using thin-set adhesive, don’t make the mistake of applying tile directly to a plywood subfloor. … While I prefer using 1/2” cement backer board over a plywood subfloor, you may be able to get by with 1/4” backer board instead.

Do you have to use thinset under cement board?

Thinset is absolutely required beneath backer-board on a floor. Also, backer-board provides no structural strength at all. You can not install it directly over a 1x subfloor; that is way too thin and will deflect.