T
The Legend; Phil Hobson RIP
Hi Bri, I have been on and off a 150m2 floor ( not laid by me) Alan ( Ajax) may remember giving me advice on this one, Anhydrite screed not abraded, not primed, screed not dry when floor was laid.
I have been on and off this job for a few months, ripping up sections cleaning up tiles prep floor etc. Not good for the client, not good for the industry.
Lack of knowledge and research by fixers. We need to ask the questions, and then get advice from people like Ajax who have the answers.
I have been on and off this job for a few months, ripping up sections cleaning up tiles prep floor etc. Not good for the client, not good for the industry.
Lack of knowledge and research by fixers. We need to ask the questions, and then get advice from people like Ajax who have the answers.
I
Ian
60x40 calibrated slate. The guy was clearly a good tiler, they are fitted to a high standard apart from them failing :lol: You know what I mean though.
Lee@emctiles
TF
I've been tapped up by a neighbour on the job I'm working on now, same problem will start a new thread for it!!
I
Ian
Just add to this one John, it'll keep all the info in the same place for future reference.
Another floor failure
Was collared by a neighbour round the corner from the house where I'm working. Went to have a look at the floor in question.
The information I have so far is this:-
Anhydrite floor pumped over UFH.
Floor sanded.
Screed contractor leaves 'green' primer with builder.
UFH was not commissioned and not sure if a moisture test was done
1 mist coat applied 3 or 4 to 1 according to customer.
1 neat coat applied.
Floor tiles approx 70m, 60x60 polished porcelain fixed with cement addy 2mm joint (Not sure what manufacturer, BAL SPF found in garage but that was used in bathroom apparently)
After a few weeks the grout started cracking and tiles flexing.
Some tiles have been lifted and replaced (badly). They came up in one piece just with a chisel under one edge.
Contractor said it was an expansion problem so they raked out the grout and filled with silicon. This did not sort the problem.
They have done a moisture test but customer has not heard back yet.
Today I have looked at the floor and I would say that 50-60% of the tiles have a hollow sound when tapped.
Below are the pictures of the tiles that were loose and removed.
You can see that the tiles were not back buttered but this clearly is not the cause of the failure.
It looks like the primer has de-bonded from the floor but if anyone can throw anything else at this I would appreciate it. I have given the customer the good news i.e. the floor probably won't take long to remove, but I think he is prepared for it all to come up. Kitchen and skirtings are all installed on top as well.
Was collared by a neighbour round the corner from the house where I'm working. Went to have a look at the floor in question.
The information I have so far is this:-
Anhydrite floor pumped over UFH.
Floor sanded.
Screed contractor leaves 'green' primer with builder.
UFH was not commissioned and not sure if a moisture test was done
1 mist coat applied 3 or 4 to 1 according to customer.
1 neat coat applied.
Floor tiles approx 70m, 60x60 polished porcelain fixed with cement addy 2mm joint (Not sure what manufacturer, BAL SPF found in garage but that was used in bathroom apparently)
After a few weeks the grout started cracking and tiles flexing.
Some tiles have been lifted and replaced (badly). They came up in one piece just with a chisel under one edge.
Contractor said it was an expansion problem so they raked out the grout and filled with silicon. This did not sort the problem.
They have done a moisture test but customer has not heard back yet.
Today I have looked at the floor and I would say that 50-60% of the tiles have a hollow sound when tapped.
Below are the pictures of the tiles that were loose and removed.
You can see that the tiles were not back buttered but this clearly is not the cause of the failure.
It looks like the primer has de-bonded from the floor but if anyone can throw anything else at this I would appreciate it. I have given the customer the good news i.e. the floor probably won't take long to remove, but I think he is prepared for it all to come up. Kitchen and skirtings are all installed on top as well.
A feweople seem to be having problems with the green primer not adhering to substrate.
i personally have never tiled onto this type of floor but I fit a lot of underfloor heating for a builder with this type of screed. The liquid screed used is a dull finish when dry (no shiny finish like some).
this tiler has no probs with it. He makes sure its been tested and is dry , uses Dunlop adhesive ( not sure which one), vacuums the floor, NO primer, then just wets the floor with a sponge before adhesive.
i have worked for this builder and tiler for many years and to date have never seen one of his jobs fail.
i personally have never tiled onto this type of floor but I fit a lot of underfloor heating for a builder with this type of screed. The liquid screed used is a dull finish when dry (no shiny finish like some).
this tiler has no probs with it. He makes sure its been tested and is dry , uses Dunlop adhesive ( not sure which one), vacuums the floor, NO primer, then just wets the floor with a sponge before adhesive.
i have worked for this builder and tiler for many years and to date have never seen one of his jobs fail.