Best answer

Cement Board and a Liquid Membrane No plastic sheeting goes behind the cement board.

A liquid waterproofing membrane, such as RedGard or Hydro Ban, is applied to the cement board and allowed to cure.

Then, tile is installed over the membrane..

Answered by: Constantinius Date created: Jun 26, 2022

Do I need a vapor barrier behind cement board in shower?

Asked By: CherryDT Date created: Jun 14, 2022

Moisture barriers stop that water or vapor from getting any farther and potentially rotting your studs, the drywall or greenboard installed behind the enclosure. They are required beneath your shower pan and behind your shower walls.

Answered By: Roman R. Date created: Jun 15, 2022

Do you have to waterproof cement board?

Asked By: karmakaze Date created: Jun 13, 2022

Most concrete backer-boards on the market today are not water-resistant, but all are waterproof. Since many people confuse the terms, it is a common misconception that this is the best material for use inside a shower or tub area.

Answered By: Elliott Brossard Date created: Jun 15, 2022

Can you paint cement board in shower?

Asked By: j1mbl3s Date created: Jun 15, 2022

Can you paint cement board in shower? Not likely. but Hardie backer board's official installation tutorial says it can be finish with paint. Use the backer board on the tiled part, and use the moisture resistant drywall on the rest.

Answered By: Pablo Fernandez Date created: Jun 18, 2022

Can cement tiles be used in a shower?

Asked By: Hao Wu Date created: Jun 24, 2022

The most common question is, "Can I use them in my shower or bath?" The answer is definitely, "Yes!" Cement tiles can also be used in wet areas such as the bathroom floor, shower floor, shower wall, steam room or sauna. ... However, do not confuse encaustic cement tile with encaustic tile.

Answered By: P.Brian.Mackey Date created: Jun 24, 2022

Do you need to waterproof cement board in a shower?

Asked By: AmigoJack Date created: Jun 11, 2022

Cement board is not waterproof. Hardibacker is not waterproof. Tile and grout are not waterproof. Cement board will not fall apart when exposed to water.

Answered By: David Segonds Date created: Jun 11, 2022

Do I need to waterproof cement board in shower?

Asked By: baptiste Date created: Jun 21, 2022

Here's what the TCNA handbook has to say about the matter: “A waterproof membrane or vapor retarder membrane must be specified to prevent moisture intrusion and protect adjacent building materials.” ~B412 Bathtub or shower with prefabricated receptor. Cement board or Fiber-cement board.

Answered By: Gonçalo Peres 龚燿禄 Date created: Jun 23, 2022

Can you use cement tiles in a shower?

Asked By: Sonia Date created: Jun 21, 2022

The most common question is, "Can I use them in my shower or bath?" The answer is definitely, "Yes!" Cement tiles can also be used in wet areas such as the bathroom floor, shower floor, shower wall, steam room or sauna.

...

However, do not confuse encaustic cement tile with encaustic tile..

Answered By: Umar.H Date created: Jun 23, 2022

Do you need plastic behind cement board?

Asked By: Emile Cormier Date created: Jun 18, 2022

Their online instructions/diagrams show no use of a vapor barrier. You should, so that any moisture that gets behind the cement board runs into the tub or shower instead of into your wall cavity (causing rot or mold/mildew).

Answered By: dawg Date created: Jun 21, 2022

Do you need a vapor barrier behind cement board?

Asked By: Pranav Singh Date created: Jun 12, 2022

You still need a vapor barrier with cement board, although in this case the barrier can go behind the board. Cement board is heavy enough and breathable enough to take the moisture without a problem. By having the vapor barrier behind the cement board you stop the moisture going further into the wall.

Answered By: Baba Date created: Jun 15, 2022

Do you need green board behind cement board?

Asked By: Jakub Truhlář Date created: Jun 15, 2022

Because cement board can be used either for floors or walls, the surface below the cement board will vary: ... In such wet areas, never install cement board directly over drywall or green board. Instead, first, remove the existing surface material, then install the cement board over the studs and membrane, as applicable.

Answered By: Manohar Reddy Poreddy Date created: Jun 16, 2022

Related Question Answers

Nolan H

Professor

Do you need to put a vapor barrier behind cement board?

You should NOT place a vapor barrier BEHIND the backer board. Where, pray tell, would any such collected vapor/water go? Answer:There's nowhere proper for such moisture to egress. The current best practice is to place waterproofing OVER the backetboard and just UNDER the tile.

Shepmaster

Professor

Is backer board the same as cement board?

Cement backer board is also called cement board, and it's the most commonly used backer board for all manner of ceramic and porcelain tiles. Made of cement and reinforced on the top and bottom with fiberglass, this waterproof backer board is generally used for tiled shower surrounds and floors in wet areas.

PaulMcG

Professor

Can you use cement board in a shower?

In showers, the standard substrate is tile backer, also called cement board or cement backer board. Ceramic and porcelain tile, more than almost any other surface material, needs a stable, flat, flex-free substrate. Even the slightest amount of movement in a building structure can telegraph to the tile and crack it.

rmaddy

Professor

Do you put cement board under a shower pan?

Once the subfloor of proper thickness is properly installed then you can apply cement board directly to the subfloor material. ALL CEMENT BOARDS MUST be installed in a fresh bed of thinset. ... If you want the cement board under the shower tray then do so - doesn't matter.

Tanaike

Professor

Can you glue stone veneer to cement board?

What can I put stone veneer on for an interior application? For interior applications, stone veneer can be installed over cement board, drywall, and all of the above.

Andrew Grimm

Professional

Can you put cement board over tile?

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.

Katriel

Professional

Can you put cement over silicone?

Yes, silicone will stick to cement board.

In fact I highly recommend that you use cement board such as 'Durock' as your backer board.

Use proper screws.

Such as the specific cement board screw..

Asim K T

Professional

How do you fill gap between cement board and tub?

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.

GManNickG

Professional

Can you use cement board for shower walls?

Cement Board and a Sheet Membrane Kerdi can also be installed directly over standard drywall in a shower because, when installed correctly, it creates a continuous waterproof barrier..

D_Pain

Professional

Do I need a shower pan liner on concrete floor?

JRC3 Member.

It will need to be lined or it will wick into the slab and studding.

The liner also makes the walls around the pan water-tight, that's why the liner normally goes up at least 3" above the pan behind the tile and backer material.

Moisture gets behind the wall tile and is eventually caught by the liner..

javanna

User

Do you have to seal cement board in a tile shower?

Although most backerboards currently available won't fall apart when exposed to moisture and are somewhat water-resistant, they aren't waterproof.

To prevent moisture from seeping through to the wood or metal studs beneath the tile, a barrier or sealant must be used on porous materials..

JohnTESlade

User

Do you install cement board before 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.

Sotirios Delimanolis

User

Do you leave a gap between cement board?

Stagger all HardieBacker cement board joints. Do not align with subfloor joints. Never allow all four corners of boards to meet at one point. We recommend an 1/8 in gap between board edges.

Blankman

User

Do you need a shower pan liner on concrete floor?

JRC3 Member. It will need to be lined or it will wick into the slab and studding. The liner also makes the walls around the pan water-tight, that's why the liner normally goes up at least 3" above the pan behind the tile and backer material.

digitaldreamer

User

Do you need plywood under cement board?

The Surface Below the Cement Board Flooring: For ceramic tile floors, the cement board usually rests on a plywood subfloor (minimum 5/8-inch-thick exterior-grade plywood or OSB). ... In such wet areas, never install cement board directly over drywall or green board.

OscarRyz

Guest

Does cement board go over lip of shower pan?

The best approach when installing cement board or other tile backer around a tub is to keep the cement board out of the lip area.

Apply it to the wall with the bottom edge about 1/4 in.

above the lip of the tub.

...

Fill the gap between the tile and the tub with caulk..

mokagio

Guest

Does cement board need to be sealed?

While you don't always need to seal backer board, it sometimes make sense to do so. If you are installing backer board in an area that will be subject to a great amount of moisture, like in a shower, then it makes sense to put a waterproofing sealer on it.

acdcjunior

Guest

Do I need cement board for kitchen backsplash?

But for a tile backsplash, if your wall is good and plumb, without any major ridges or problems, you don't always need to use a backer board, often you can just apply thinset to the walls and put your tiles in place.

tmhao2005

Guest

Is a vapor barrier necessary behind cement board?

Cement board is heavy enough and breathable enough to take the moisture without a problem. By having the vapor barrier behind the cement board you stop the moisture going further into the wall. ... You should NOT place a vapor barrier BEHIND the backer board.

Aziz Alto

Guest

Should I put plastic behind cement board?

No plastic sheeting goes behind the cement board. A liquid waterproofing membrane, such as RedGard or Hydro Ban, is applied to the cement board and allowed to cure. Then, tile is installed over the membrane.

unwind

Guest

Does cement board in shower need waterproofing?

“A waterproof membrane or vapor retarder membrane must be specified to prevent moisture intrusion and protect adjacent building materials.” ~B412 Bathtub or shower with prefabricated receptor. Cement board or Fiber-cement board. Ceramic Tile. ... Consult local building code for moisture barrier requirements.”

jateen

Guest

Can you put cement board on the floor?

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..

Itay Moav -Malimovka

Guest

Do you have to put Thinset under cement board?

No Thinset underneath the backer board “The thinset goes ON TOP of the cement board to stick the tiles!” ... Cement board is a different product and it needs to be installed in its own way. Additionally, screws don't take the place of thinset either.

Andrew Whitaker

Guest

How do you fix cement board in a shower?

Linda CottinStep 1: For holes larger than 1/2-inch in diameter, use a carton knife or carbide-tipped tool to cut a V-shaped groove behind the edges of hole. ... Step 2: Use a clean, damp sponge to wipe down the area to be patched.Step 3: Mix up a small amount of thin-set mortar following the manufacturer's instructions.More items...•

Josh Mc

Guest

Should I put Thinset under cement board?

Embed the cement board in latex-modified thin-set mortar The main reason for using thin-set between the cement board and the subfloor isn't as much for bonding as it is for even, void-free cement board support throughout the floor. ... Then spread thinset mortar with the flat side of a 1/4-in.

Petr Viktorin

Guest

Should you put a vapor barrier behind cement board?

You still need a vapor barrier with cement board, although in this case the barrier can go behind the board. Cement board is heavy enough and breathable enough to take the moisture without a problem. By having the vapor barrier behind the cement board you stop the moisture going further into the wall.

Thomas Dondorf

Guest

What do you put on seams of cement board?

Use special mesh tape on seams Cut drywall to fill in between the existing wall or ceiling and the cement board. Screw the drywall to the studs. Cover all of the corners, joints and seams, including the joint where drywall and cement board meet, with the fiberglass mesh tape.

JD Isaacks

Guest

Is cement board the same thickness as drywall?

Whereas drywall comes in 4-by-8 sheets, cement board comes in 3-by-5 sheets. ... The smaller dimensions of cement board make the installation of it on large walls more difficult, but cement board panels fit vertically in 3-foot wide showers, or horizontally behind a standard 5-foot bathtub.

JeffV

Guest

Is Durock cement board non-combustible?

This DUROCK® cement board is a non-combustible, water and mold-resistant panel designed for use under tile, in shower areas, and readily applied over ...

Lex Li

Guest

Do I need cement board for shower ceiling?

It can be, but it's not really necessary. You can tile directly to drywall in any dry area. If your doors go all the way to the ceiling, you might consider cbu verses any kind of drywall on the ceiling, otherwise, it is considered a dry area.

Maze

Guest

Can you caulk cement board in shower?

In the event the caulk seal between the bottom row of tile and the tub/shower fails, water can get behind the tile. If the backer board is touching this ledge, it will readily soak up this water like a sponge. ... Then, before installing the tile, apply a bead of pure silicone caulk between the backer board and the ledge.

rdegges

Guest

Do you have to glue down cement board?

You cannot put a cement backer board over that. You need to put a layer or plywood, minimum 5/8 IIRC, over those boards, then mortar the backer to the plywood. Those 1x8 boards won't give a solid foundation and will flex. Over time, that will cause tile to pop loose or crack.

rahulserver

Guest

Do you need a shower liner on concrete floor?

JRC3 Member. It will need to be lined or it will wick into the slab and studding. The liner also makes the walls around the pan water-tight, that's why the liner normally goes up at least 3" above the pan behind the tile and backer material. Moisture gets behind the wall tile and is eventually caught by the liner.

davin

Guest

What kind of cement do you use for a shower pan?

Floor Mud QUIKRETEQUIKRETE® Floor Mud (No. 1548-81) is a Portland cement based underlayment mortar designed for leveling travertine, slate and marble floor tile, and for shower pan applications.

juliomalves

Guest

What kind of concrete do you use for a shower pan?

The best concrete mix for shower pans is made by Quikrete.

They make two products, the first is called Floor Mud, the 2nd is their Sand/Topping mix.

Both work great for building a shower pan..

Nick Heiner

Guest

Where do you put cement board in a bathroom?

Cement backer board is mainly used as a sub-surface for tiling. Cement backer board is often used as a tile base on plywood or OSB subfloor. Cement backer board on concrete as a subfloor or underlayment is usually not recommended or needed. In most cases, you can apply tile directly to the concrete.

Felipe Oriani

Guest

What kind of paint do you use on cement board?

Acrylic paintFor cement boards that have already been primed, 100% acrylic exterior paint is recommended. Acrylic paint is the best choice for cement board. It's especially important if you are working with new cement board to avoid oil-based primer.

haccks

Guest

Do you have to put cement board under tile?

In short, tile and grout are not inherently waterproof. ... Cement backer board is often used as a tile base on plywood or OSB subfloor. Cement backer board on concrete as a subfloor or underlayment is usually not recommended or needed. In most cases, you can apply tile directly to the concrete.

Tom Sharpe

Guest

Can I 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!

Divyanshu Maithani

Guest

What do you cut cement board with?

The simplest way to cut cement backer board is to score the surface and snap the sheet along the scored line, similar to the way you'd cut drywall. In fact, you can use a drywall utility knife to score backer board, but a better option is a carbide-tipped scoring tool.

Maxpm

Guest

How high should cement board be in shower?

Start installing your boards a quarter inch above the floor, tub, or shower board and caulk accordingly. 2. Fasten cement board with specified nails or screws, a maximum of 8” on center at all supports.

Dmitry Bychenko

Guest

Should you wet cement board before tiling?

The concrete is unaffected by any water that manages to get behind the ceramic tile. But these concrete products are heavy, problematic to cut and can wick water, causing wood rot. ... If you use cement backer board, you have to install a separate moisture barrier between the board and any wood it's attached to.

TanvirArjel

Guest

How many bags of cement do I need for a shower pan?

Building a mud shower is really hard work. This one required 300 lbs (dry) of cement and sand. Another 300 lbs of cement board for the walls. More hundreds of lbs of tile, thinset and grout.

Jeff Foster

Guest

What is better cement board or backer 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.