Questions tagged [cement-board]

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Drywall or cement board in gap between bathtub and corner

So, I’ve about installed all the cement board for my bathroom tile renovation around the 3 sides of the tub. There is approximately a 2” gap between the corner of the room and the bath tub. For the 2” ...
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51 views

HardiePlank Lap Siding and Trim Questions

I’m looking at doing my first project with HardiePlank Lap Siding and Trim on my house.  I’ve read the technical documentation and overall it looks like it pretty strait forward to install.  This ...
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154 views

how to extend wall board to window for narrower trim

We installed cement board on a wall to prep it for tiling. The gap between the window and the outline of the rough opening is anywhere between 3" to 3.5" (it's inconsistent). I want to install ...
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98 views

Why would there be a wooden board under cement board in tub alcove?

I'm removing the cement board to make tiling easier. I've so far removed two walls. The third wall however is the one with the shower head and controls on it. I rubbed away a bit of cement board (to ...
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0answers
712 views

Apply stucco directly to cement board

I'm fixing stucco on an old house and it appears as though they literally just added stucco onto cement board with asphalt kraft paper in between. I have to remove a piece to add in new cement board ...
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18 views

waterproof shower: waterproof pan or not?

I have a question about waterproofing our shower. We have a pre-slope, then the PVC liner, then the final mud bed. We are going to use the Aquadefense liquid waterproof membrane. We installed our ...
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38 views

Installed Hardie board with tin roof

Installed Hardie board, silver side down as ceiling with tin applied as roof. Can this type of application withstand being the roof/ceiling in an outdoor kitchen with no side walls?
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28 views

How to finish joint of cement board

When cement board meets a block is expanding metal sufficient to put over the joint to stop it cracking before I scratch coat? And do I need to put scrim on the joints of the cement board as well as ...
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7 views

Mounting a Starglo SG6 NG fired ceramic infrared heater under my porch roof — using cement board attached to rafters

I've been using a succession of pedestal NG heaters for years (they wear out). I'd like to mount a Sunstar ceramic radiant heater (twin burner - 65,000 btu) beneath the roof (12 pitch, 20' floor to ...
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63 views

What is this under the backerboard?

I am currently working on demoing our kitchen and am not sure how to proceed. I recently did our bathroom and for the floor I left the old backerboard, chiseled remaining thinset, applied a self-...
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265 views

Outdoor tiled countertop - plywood / cement backer board / both - will it be movable?

I'm building an outdoor 'workbench' for tabletop BBQing / pizza oven / gardening. The countertop will be tiled with 6mm thick, 165mm square porcelain tiles using a flexible exterior-suited adhesive. ...
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1k views

Gap between cement board and drywall

We're putting in a shower and I had originally found a tutorial that showed to leave ~1/8 to ~1/4 gaps around the cement board and drywall surround that would be filled with caulk to prevent water ...
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200 views

What to use as void filler behind between shower's studs & cement underlayment board?

I am in the middle of remodeling my bathtub/shower surround. For my tile underlayment I chose hardibacker, and the appropriate hardi screws. A youtube video series that I am using as my tutorial is ...
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68 views

Is subfloor / underlayment for tile different for a small area

Normally for plank subfloor one is supposed to add 1/2 inch of plywood plus cement backer board for underlayment. For a small area say 4 feet by four feet is all of this necessary?
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3k views

joint between cement board and existing drywall not flush — how to treat?

We're redoing a wall in our kitchen because it was too uneven to lay our countertop-to-ceiling tile backsplash. The base cabinets and countertops have been installed already, and there are no upper ...
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1answer
3k views

Can cement backer board be used to support bluestone or slate outdoor raised patio?

We are designing a multi-level stone patio. To exit the kitchen directly onto the stone patio, the highest part of that patio would be 12 inches above the foundation. The next level would be flush ...