Dogger.
2022-04-07 09:41:24
- #1
Hello, I am looking for a solution to a tile problem,
I want to lay new tiles (slate) myself in my house (30 years old).
The tiles are 40x60 cm and should decorate the floor in a third-pattern bond.
Now, there are 3 expansion joints in the old tiles in the middle of the room.
The room has a U-shape. The old tiles should be removed down to the screed.
The room has underfloor heating.
Two joints are therefore perpendicular to the tile pattern.
Problem: straight expansion joint perpendicular to the third-pattern bond of the tiles.
My idea is to stick a thin sealing membrane with silicone onto the screed over the expansion joints.
I would slightly grind (mill) the screed by 1-2 mm in the area of the covered expansion joint to avoid an elevation.
After I have then laid the tiles on the sealing membrane with C2FT S1, I cut through the membrane again along the joints between the tiles near the expansion joint.
My hope is that this way I can transfer the straight expansion joint onto the zigzag (third-pattern bond) expansion joint of the tiles.
The tiles that span the expansion joint in the screed would thus lie "floating" on a thin silicone bed.
What speaks against this approach apart from the shear forces in the expansion joint which cannot be well absorbed in the tile joint?
Are there other options besides covering the entire floor with expensive uncoupling mats?
I thank you for any constructive criticism.
I want to lay new tiles (slate) myself in my house (30 years old).
The tiles are 40x60 cm and should decorate the floor in a third-pattern bond.
Now, there are 3 expansion joints in the old tiles in the middle of the room.
The room has a U-shape. The old tiles should be removed down to the screed.
The room has underfloor heating.
Two joints are therefore perpendicular to the tile pattern.
Problem: straight expansion joint perpendicular to the third-pattern bond of the tiles.
My idea is to stick a thin sealing membrane with silicone onto the screed over the expansion joints.
I would slightly grind (mill) the screed by 1-2 mm in the area of the covered expansion joint to avoid an elevation.
After I have then laid the tiles on the sealing membrane with C2FT S1, I cut through the membrane again along the joints between the tiles near the expansion joint.
My hope is that this way I can transfer the straight expansion joint onto the zigzag (third-pattern bond) expansion joint of the tiles.
The tiles that span the expansion joint in the screed would thus lie "floating" on a thin silicone bed.
What speaks against this approach apart from the shear forces in the expansion joint which cannot be well absorbed in the tile joint?
Are there other options besides covering the entire floor with expensive uncoupling mats?
I thank you for any constructive criticism.