Premixed Mortar for Bathroom Floor Tiles

Question Icon
Posted by: from Toronto
2/7/2019 at 11:57:03 PM

Hello Pros,

Would you suggest the premixed mortar for the 6x24 inches floor tiles in the washroom? What size trowel should I use for this size of tiles?


User Icon
Date/Time2/8/2019 at 1:09:53 AM

Most of floor tiles used half inch trowel

User Icon
Date/Time2/8/2019 at 1:49:52 AM

The type of thin set mortar you should use would depend on what you are installing the tile over. In most cases you should use a modified thin set, and I much prefer mixing it from bags.

Many installers use a 1/2 trowel, as was suggested, however I prefer a 3/8 trowel as I find it adheres as well (you should back butter your tile) and isn't as messy.

Hope that helps.

User Icon
Ryan from DOJ contracting in Brantford
Date/Time2/8/2019 at 6:11:03 AM

I would not recommend premixed mortar. And

For trowel size, half inch trowel on floor and quarter inch for walls.

User Icon
Date/Time2/8/2019 at 7:39:42 AM

Put the edge of the tile against the notches of the trowel. You want the trowel notch depth to be more than the thickness of the tile. That's how you know.

User Icon
Cornel from Steopan Remodeling in Coquitlam
Date/Time2/8/2019 at 1:02:23 PM


Premixed Mortar is a specifically for interior installation of most ceramic quarry porcelain, and natural stone tile residential application such as walls, countertops and floors.

Do not apply over waterproofing, membranes, wood planking, press wood, particle board, chipboard,oriented standard OSB, pressure treated or oil treated , plywood.

Premixed Mortar can be use Recomended for interior only, can be use intermittent wet condition such as Backsplash Countertops, Shower Walls, Floors,use only temperature, between 10 C-35 C.This product is only setting not grouting.

Drying time will vary depending on tile size ,tile /substrate porosity and humidity.

This product should not be used with tile larger than 20"x20".

Typical Trowels and Approximate Coverage.

Flat baked up 4"x4".

Tiles from 4"x4"to 8"x8".

Tiles from 8"x8"to20"x20".

Trowel use 4,5x4mm.


Do not spread more adesive than can be covered before the adesive with slight push/pull motion across the ridges completely shearing the mortar ridges to give positive transfer to the tile.

Allow tile to reach a firm about 24 to48 hours and then grout with the appropriate Mapei grout.

Larger tiles such as 12"x12" will generally take longer to reach a firm set than a 6"x6" Tile.

User Icon
Matt from Reveal 360 Inc in Cambridge
Date/Time2/9/2019 at 5:30:38 AM

thats going to depend on what tile are you installing?

Search the TrustedPros directory and discover the best contractors in your area.

Find your home service pro
Great renovations start with a great contractor.

Since 2004, TrustedPros has been helping homeowners find the right contractor for their home improvements and repairs.

Post Your Project

Within hours you'll be comparing offers from top-rated professionals. It's free to post and you're under no obligation to hire.

Trustedpros Inc. does not warrant the accuracy, completeness, safety, legality or usefulness of any Content, or Whether Content is Current and up-to-date, and TrustedPros Inc. Shall have no liability whatsoever with respect to your use or reliance upon any content or for content being removed or otherwise ceasing to be available. Please refer to the terms and conditions of use of this websites for more details.

Get quotes from top-rated contractors