First of all, hello everyone,
Our bathroom is finally finished with tiles and it looks absolutely amazing! We chose tiles measuring 600x600mm (24x24 inches) with very narrow grout lines. We installed a high-quality fast-setting screed underneath and an inexpensive underfloor heating system below that – although it’s not intended as a primary heating source.
Now, we have the following problem:
After the second round of plastering, we unfortunately noticed that
1. one of the tiles has a crack – it’s barely visible, almost only noticeable by touch. But now we know this defect exists. The crack is about 15cm (6 inches) long.
2. one grout line has cracked. When I tapped on the tile, I also noticed it sounds “hollow.”
What do you think – would you report this to the company immediately and have it repaired?
I’m not sure if it’s a big issue regarding moisture penetration. What I’m concerned about is the tile possibly breaking if it is hollow underneath!
Thanks for your advice!
Best regards, Smeralda
Our bathroom is finally finished with tiles and it looks absolutely amazing! We chose tiles measuring 600x600mm (24x24 inches) with very narrow grout lines. We installed a high-quality fast-setting screed underneath and an inexpensive underfloor heating system below that – although it’s not intended as a primary heating source.
Now, we have the following problem:
After the second round of plastering, we unfortunately noticed that
1. one of the tiles has a crack – it’s barely visible, almost only noticeable by touch. But now we know this defect exists. The crack is about 15cm (6 inches) long.
2. one grout line has cracked. When I tapped on the tile, I also noticed it sounds “hollow.”
What do you think – would you report this to the company immediately and have it repaired?
I’m not sure if it’s a big issue regarding moisture penetration. What I’m concerned about is the tile possibly breaking if it is hollow underneath!
Thanks for your advice!
Best regards, Smeralda
Hello Smeralda,
- We also have tiles with heating mats underneath in our bathroom – we are very familiar with the problem you’re experiencing 🙂
There can be several reasons for hollow spots:
1. The fast-drying screed might not have been sufficiently dried! This could also mean that more tiles might come loose in the coming days.
As far as I know, the residual moisture of a base floor on which tiles are laid should not exceed 0.3% (SIA Swiss standard) or 0.5% (DIN German standard). The residual moisture should have been measured with a CM moisture meter! Has a measurement been carried out? Because residual moisture is a problem not only with parquet but also with tiled surfaces – specifically with tiles because once they are installed, the moisture cannot escape from the base floor anymore, which can lead to tiles detaching or hollow spots forming.
2. How was the heating mat for the underfloor heating embedded? Hopefully not with tile adhesive, right?
Regards,
medic
- We also have tiles with heating mats underneath in our bathroom – we are very familiar with the problem you’re experiencing 🙂
There can be several reasons for hollow spots:
1. The fast-drying screed might not have been sufficiently dried! This could also mean that more tiles might come loose in the coming days.
As far as I know, the residual moisture of a base floor on which tiles are laid should not exceed 0.3% (SIA Swiss standard) or 0.5% (DIN German standard). The residual moisture should have been measured with a CM moisture meter! Has a measurement been carried out? Because residual moisture is a problem not only with parquet but also with tiled surfaces – specifically with tiles because once they are installed, the moisture cannot escape from the base floor anymore, which can lead to tiles detaching or hollow spots forming.
2. How was the heating mat for the underfloor heating embedded? Hopefully not with tile adhesive, right?
Regards,
medic
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