Preparing Bathroom Floor For Ceramic Tiles

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Posted by: from Calgary
4/9/2013 at 3:44:20 PM

This is my first reno in Canada and with the help of this community and a lot of friends I have made tremenduous progress.

As for the walls, I removed the old tiles & wall and upgraded the plumbing.... installed cement board in the shower surround and used RedGuard on the walls to waterproof it before I lay the tiles.

I have removed the 3 layers of flooring in bathroom. I am now left with the bare floor and attach for you a picture. Sorry for the poor quality. I have to prepare the floor for the new tiles and am not sure if I should install backerboard on the floor before installing the new ceramic tiles?

Looking at my pictures...what is your opinion?


preparing bathroom floor for ceramic tiles
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Date/Time4/9/2013 at 4:21:53 PM

Yes you must put some sort of backer board down be it cement board, Hardy, or my go to product Ditra.

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Date/Time4/9/2013 at 6:49:35 PM


Stewart here of Sct floorcoverings.Yes the best way to insure long term Durability in wet areas like bathrooms is to cement and screw down CBU (Cement Backer Sheets) use 1/2 inch thick sheets, pre cut all the cbu in the room, then cement using a runny, wet mix of your tile set cement, then screw down with Rock board screws.

Best regards

Stewart- Sct Floorcoverings

Mississauga ontario

ph# 289-814-3023

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Dave from 360renos in Navan
Date/Time4/10/2013 at 6:41:06 AM

Good morning Patricia,

Stewart has given you the information on exactly how I would complete the next step plus this extra info you will be well on your way to a great looking floor.

After you embed the cement board in a mortar mix and screw it down every 6", fill the board seams with mortar mix and embed mesh tape in the mix . Scrape off excess to a smooth finish and allow to dry 24hrs.



Preparing Bathroom Floor For Ceramic Tiles
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Michael from Only Bathrooms in Vaughan
Date/Time7/21/2013 at 12:10:57 AM

Hi Patricia.

If you are using the backer board method make sure your tile joints and the board seams don't line up.

Running the backer board on an angle may help but creates more waste.

We still prefer the old school mesh method - it's more work, but we find it holds out better.

If your floor joists aren't 12 o/c (center to center) you may want a layer of plywood down first (1/4 or 3/8 spruce). Plywood needs to be installed in the opposite direction of the joists (glued and screwed).

Good luck,


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