Cracked floor tiles - Slab joint

[misterp2811]

Hello,

When we purchased our hose a couple of years ago, we had a line of cracked tiles in the hallway. I'm in the process of decorating the hallway and have decided to address the cracked tiles.

Today, I've remove the 3 cracked tiles and have found the root cause of the cracking. It appears the floor was laid in 2 separate pours and there is a seam directly under where the tiles cracked.

I assume since the floor was laid there has been a some movement, however, in this scenario I have read that there should be an expansion joint up to the surface of the ties to prevent the new ties just cracking again.

Here's the problem:

Here's what I believe I need:

http://www.wallsandfloors.co.uk/til...-Movement-Joints/Heavy-Duty-Beige-08mm/14972/

Is this the best course of action here? Anyone any experience with this type of joint?

I will need to cut the tiles to fit the joint (as its part way through a complete tile) - Will a good finish be achievable? I assume a 8mm depth as my tiles are 8mm thick.

Thanks in advance![/url]

 

[Richard C]

An expansion joint where the two meet is the only way you’re going to prevent it cracking again. A proprietary joint will do it but another method is to tile up to the crack either side & run a silicone bead between the two; cheaper but may not look as good. The expansion joint must obviously straddly the floor joint.

You need to allow for the depth of tile adhesive which is usually 3-4mm on a solid bed adhesive base. Use cement based adhesive only, tub mix isn’t suitable for floors. You must acrylic prime anhydrite screed when using cement based adhesive.