Best answer
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..
Do I need a vapor barrier behind cement board in shower?
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.
Do I need to prep concrete floor for tile?
Before you lay any sort of tile, whether it is stone, ceramic or peel and stick vinyl, you must prepare your concrete floor to ensure that the tiles will go down properly and stay where they're placed. Sweep the floor thoroughly to remove all dust and debris. Rinse the floor in small sections and then blot it dry.
Do I need to prime concrete floor before tiling?
As a general rule, we would say use a primer of some description to prepare your floor prior to tiling. ... For instance, an old concrete floor that was tiled previously will probably not need a primer, as long as the surface is clean and free from old adhesive and anything else that was stuck to the floor.
Do I need to seal concrete floor before painting?
For a clean and even coat of paint, your concrete surface will need to be thoroughly cleaned before primer is applied. Use a strong sealer to fix any cracks and seal the interior surface of the concrete completely.
Can cement tiles be used in a shower?
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.
Do you need to waterproof cement board in a shower?
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.
Do I need to waterproof cement board in shower?
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.
Can you use cement tiles in a shower?
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..
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.
Do you need to waterproof concrete bathroom floor?
If the bathroom floor is either concrete or compressed fibre cement sheet flooring then there is no requirement for full waterproofing of the floor and the extent of floor waterproofing will depend on whether it has a bath with a shower over it or the shower recess is enclosed with a shower screen.
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