Tile Over Old Mortar - Hearth Retile DIY

Help Support House Repair Talk:

Joined
Nov 27, 2018
Messages
6
Reaction score
0
Location
San Lorenzo CA
Hello! I am retiling our fireplace hearth myself. Removed old tile and need to prep for retiling with new porcelain tile.

My question is how do I prep the old surface - old mortar that is on original brick.

I don't want to grind the mortar down because renting grinder $$

I do want to keep tiles as low as possible to the ground, so I don't want to use a backer board that will lift the tile at least .5 / .75 inches up requiring a " frame" made around tile.

Can I just chisel out all possible remains of old mortar, and then use a self leveler like Henrys Patch and level to prep the surface and make it even and level? Then I apply new mortar?

https://www.homedepot.com/p/Henry-345-1-Qt-Pre-Mixed-Patch-and-Level-12063/202046251

thank you in advance folks

22.jpg 11.jpg
 

Jeff Handy

Well-Known Member
Joined
Nov 20, 2019
Messages
564
Reaction score
153
Location
Chicago suburbs

Jeff Handy

Well-Known Member
Joined
Nov 20, 2019
Messages
564
Reaction score
153
Location
Chicago suburbs
https://www.amazon.com/universal-oscillating-HEMUNC-accessories-concrete/dp/B07VP47KZ2

I also think you could probably knock off everything loose and crumbly with a 4 inch brick chisel and a ball been hammer.
Or a long floor scraper, like for scraping up old vinyl tile.

This one is 6 inches wide. They come in wider widths also.
Whatever this did not scrape off, the multi tool could grind off with no massive cloud of dust.

Floor Bully 6 in. Flooring Scraper

https://www.homedepot.com/p/100188949
 
Last edited:

mabloodhound

Restoration & Renovations
Joined
Jun 21, 2008
Messages
300
Reaction score
99
Do it by hand. And yes, then apply leveler if needed. There is very little walking traffic on a hearth so you will be fine.
 
Joined
Nov 27, 2018
Messages
6
Reaction score
0
Location
San Lorenzo CA
Thanks for the help folks. I ended up just removing the old mortar by hand with a chisel and hammer exposing the original brick below, we just painted the brick and called it a day.
 
Top