Newly laid porcelain floor tiles over UFH, showing lines,
- Thread starter Ian gall
- Start date
Hi. Did he use grey adhesive?
Yes
and that would show through an 8mm porcelain tile?
Hi
heating matts covered in self levelling screed and watch him and full coverage not dot and dab.Adhesive was grey though , tiles are 8mm porcelain
It has been known yes , hence why a solid bed is best achieved.. on light tiles no matter the biscuit ( body ) , i use white adhesive.
thanks for responses.....don’t know how I would prove tiles were at fault?
So grey adhesive ok to have been used as long as not dot and dab?
tiles laid some 4 weeks ago and heating only hooked up a week ago.
could marks go away? or will i have to live with them, as don’t fancy floor coming back up in a large 33sq meter Kitchen area.
trying to be sure in first instance it’s not likely to be a fitting issue.
Thnx. Are lines likely to be permanent? Tiles laid 4 weeks ago UFH only hooked up a week or so ago.
We had a similar issue on a job. We were brought in to investigate for insurance purposes.
1.There was no membrane put down onto the new concrete flooring and the moisture came through from the concrete into the grey adhesive and stained the tiles.
2. The tiles weren't fitted correctly many where dot and dabbed there was actually pools of moisture when we lifted the tile.
3. The tiles where laid onto concrete that was new and hadn't been allowed to cure and dry long enough.
Hope this help
Thanks for that.
the kitchen was extended so part old floor part new, there was a DPM but down on new floor,. New floor was a quick set of about a week, but was left for some 6 weeks before anything went down onto it, however the lines are on tiles on both old and new floor so,fairly sure It’s not the floor. I assume that’s a reasonable assumption?
It’s the adhesive, sorry but simple as that.
truth hurts! I now have to decide having new tiles ripped up with all the mess involved even more of an issue with electric UFH mats underneath or live with the lines 😱
My guess is that the SLC didn't lose it's required moisture content prior to tiling, and everybody just carried own piling down more stuff and trapping more moisture...
Put a carpet over it,
Really? Most self levelling screed is ok to cover in 24 hours or less. This was screened one morning and tiling did not start till following day and took a further 4 days to complete yet lines are on all tiles pretty much, certainly all full size tilesz
.
Hi, that looks to me like adhesive bleed through the tile. If you look closely enough you can see the lines correspond to the trowel that was used to lay the adhesive. This is due to a couple of reasons.. 1) Grey adhesive used instead of white. 2) No back buttering of the tile prior to laying it onto the adhesive ridges. 3) The adhesive ridges have not been collapsed and that's the lines you can clearly see.
Sadly, this is something you are probably going to have to live with if you don't wish to relay the floor correcrly.
Yeah, you're probably right, dependant on temp. Are they fully vitrified porcelain tiles?
I've changed my mind to the incorrect installation of the UFH wires and/or waiting times before it was turned on.
It could be excessive heat due to the UFH installer ordering too much mat and overlaying (not allowable) or a rapid heating of the mat/cable which has caused a premature curing of the background.
How much faith do you hold with the tiler you employed?
Hi
saw the mats down and no overlapping..once UFH turned on was only set at a ro9m temp of 20 degrees, floor temp never much above 14 deg,
he was meticulous with each tile is all I can say , as not had this work done before.
not sure if vitrified as just described as porcelain, was not aware of the term vitrified until recently .
They are not cowboys for sure , do a lot of bathrooms especially, and seemed to know what they were doing.
bit of a nightmare as not sure whether to give it some time fade, they are checking with their adhesive suppler as never had this before.
I would run the UFH for a few weeks and see if it improves. Fingers crossed it might.
They are described as glazed porcelain..
thanks, have agreed with tilers that as tiles were laid couple of weeks before heating was hooked up, that would leave till end of March and in meantime they are seeking sone advice from the adhesive suppliers who will probably say the same.
thanks For you input , appreciated.
Vitrified means that the tile isn't porous to any problematic level of moisture. Porcelain is a material designed for very low porosity, hence it's outdoor use in cold climates and hard wearing properties.
Keep us updated on results 👍
Will do and thanks
There are similar tiling threads here
Featured Threads
-
- F
- W
-
- I
-
-
-