Quick Answer: How Thick Should Subfloor Be Under Tile?

Can you tile directly on cement board?

Cement board forms a durable, stable base for tile, and it has no organic materials (unlike drywall, greenboard, or plywood) so it is not prone to mold, rot, shrinkage, or decomposition due to moisture.

Ceramic tile laid over cement board is one of the most durable floor or wall surfaces you can install..

How thick should a tile floor be?

Tile installed over wood floor systems MUST have a minimum of 1-1/4 inches of solid material beneath it. This means you can have a 3/4 inch wood subfloor covered by 1/2 inch plywood, cement board, or approved gypsum fiber underlayment.

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.

What is the best material for a bathroom subfloor?

PlywoodPlywood as a Subfloor Material Traditionally, exterior grade plywood has been the subfloor material of choice for many bathroom flooring projects. Plywood is made by gluing alternating layers of wood veneer. CDX plywood (¾”) in particular is used often because it has a high level of resistance to moisture and humidity.

Do bathroom floors need to be waterproofed?

Bathrooms are, by nature, wet spaces. But you want to be sure that water doesn’t leak through walls and cause mold or other damage. To avoid leaks and excess moisture build-up, take care to waterproof your bathroom wall, floor and ceiling.

What should I put down before tiling?

Oriented strand board (OSB) and exterior-grade plywood will work if first covered with a latex-modified mortar and a tiling backer board. Install a cement-based backer board following the manufacturer’s instructions. This provides a solid surface under the tile that prevents flexing that could lead to cracking.

What type of subfloor goes under tile?

Underlayments are the support materials that lay underneath your tile on a floor. They sit between your subfloor (usually plywood) and your tile. They provide a water-stable base, make the floor more rigid (less chance of cracked tiles), and are better suited for tile adhesion.

Do you need a membrane under tile?

If tile is laid directly on top of concrete, this expansion and contraction will cause stresses that fracture or delaminate the tile. … Although some substrates absolutely require uncoupling membranes, they can be installed on a range of surfaces, including cement mortar, backerboard, OSB, and plywood.

What is the best plywood for underlayment?

The several materials available for underlayment include particle board, hardboard and oriented-strand board (OSB), but American Plywood Association (APA)-graded plywood is widely accepted as a suitable choice for most jobs.

How thick should a bathroom subfloor be?

Make Sure Your Subfloor is Structurally Stable The installation guide for 1/4 inch HardieBacker recommends having wood subfloors made of 5/8 inch exterior grade plywood or OSB (oriented strand board) that is 23/32 inches thick.

Can I 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 I need cement board under floor tile?

Cement board is a type of underlayment that is now standard for most tile installations, but particularly for floor tile. The primary benefit of cement board is that it doesn’t break down or expand or warp if it gets wet. This is a distinct advantage over plywood and drywall.

Do I need a vapor barrier under tile flooring?

Do I need to put any type of underlayment or vapor barrier underneath it? A: It’s perfectly acceptable to put tile directly on concrete — with a couple of caveats. … Those products should help prevent any cracks in the slab from damaging the newly installed tile.