10 Dec 2014
Tile over old tiles
Removing tiles is exhausting if you’re the one doing the job. Which means you are into DIY and then this article is for you.
If you are thinking of tiling over old tiles, before proceeding, you should answer the following questions.
1. Is the existing tile floor solid enough and properly attached to the subfloor?
2. Are you OK with a higher level on your new floor?
If you answer yes to both of these questions, you may start tiling. If not, you should be aware that a damaged tile floor will not work under the weight of a new set of tiles
(check your existing floor for cracks in the grout or tiles, hollow sounds underneath them etc). Also, the difference of level may be problematic with doors and there is a risk of tripping up as you move to and from the bathroom.
So how do you actually approach this job – placing new tile over old tiles?
Mix the thin set and spread a coat over the old floor in order to fill the grout joints, create a smooth surface to add the new tiles on. Let it dry.
This is the moment when you should decide your starting point so that it looks straight, even if the room plan is not. You can choose the door line to plan the geometry of your new floor.
Mix the mortar and spread it over with a notched trowel, first with its flat side, then with the notched side to obtain the setting bed.
Begin from your established starting point and go towards the walls. Pay attention to your grout joints and make sure they are straight. Press gently but firmly on the top of the tile to make sure it’s properly fixed into the mortar.
When you get close to your walls, make measurements and cut the tiles with a tile cutter
When your whole floor is covered in the new tiles, let it dry for 24 hours and don’t step on it.
The final step is mixing the grout and spread it on all joints. Remove the excess with the edge of the grout float. Clean the tiles with a damp sponge and let it dry. Then clean again.
There you have a brand new tile floor, on top of your old one.
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