Failed anhydrite floor - TilersForums.com

[Ajax123]

I went to look at a floor that had failed a couple of days ago and of the 60 m2, not much of it seems to be left attached to the screed. The grout is cracking and most tiles sound hollow. It's going to be a mammoth task sorting it out as the skirtings and kitchen are all fitted ontop. Now before I delve in and start pulling the place apart, what are people's thoughts on trying a resin injection to remedy the situation, is it worth a go? It wasn't me who tiled it originally so I'm not sure exactly why it's failed, my guess would be wrong prep or wrong adhesive, I won't know until I remove a couple of tiles. The lady has only been in the house 18 months and I want to cause as little disruption as possible, I feel quite sorry for her as she is quite clearly distressed about it.

It would depend why it has failed. Is it damp, poor prep, primer failure etc. if it is simply a case of poor prep it it is well worth a try to ropes in inject. You will probably have to regroup afterwards but I suspect that would be cheaper and easier than a complete rip out. My suggestion would be to get some resin (I think mapei do one and possibly Bostik) and try it on a small area before launching yourself at the whole thing. I would be very interested to know if it achieves a fix. I suspect it will as it has been done in Germany and America for several years. I know of a couple of jobs in the uk where it has been done successfully.

Not sure if the epoxy system would work on a damp screed. There are quite few DIY vids on YouTube for resin injection repairs to hollow spots.

 

[Ian]

Bri, you could be opening up a can of worms m8.
You say you want to keep the mess down but what if the screeds not been sanded?
I wouldn't like to sand 60m2 with a kitchen & skirtings fitted.
Just a thought..

I'll bet it probably hasn't been sanded, I know that it's a rip out and redo. I'll just have to do it in room sized areas with some super duper vacuum equipment. She doesn't want any disruption this side of Christmas, I'll probably suggest going on holiday for a couple of weeks in Feb/March.

 

[Ajax123]

If it's local to Grantham I would be happy to meet you on site to help you assess the situation.

 

[Ian]

It would depend why it has failed. Is it damp, poor prep, primer failure etc. if it is simply a case of poor prep it it is well worth a try to ropes in inject. You will probably have to regroup afterwards but I suspect that would be cheaper and easier than a complete rip out. My suggestion would be to get some resin (I think mapei do one and possibly Bostik) and try it on a small area before launching yourself at the whole thing. I would be very interested to know if it achieves a fix. I suspect it will as it has been done in Germany and America for several years. I know of a couple of jobs in the uk where it has been done successfully.

Not sure if the epoxy system would work on a damp screed. There are quite few DIY vids on YouTube for resin injection repairs to hollow spots.

I think I'll remove a few tiles in different areas just to see why it's failed. The utility room is only 2 m2 or so, so that would be a good test area. Most of the grout is loose so getting the resin in won't be difficult, I'll look into it further and report back.

 

[Ian]

If it's local to Grantham I would be happy to meet you on site to help you assess the situation.

Its a couple of miles outside of Grantham Alan, Barkston if you have heard of it. Thanks for the offer, I'll definitely take you up on that when I come to do the job.

 

[Ajax123]

I'll bet it probably hasn't been sanded, I know that it's a rip out and redo. I'll just have to do it in room sized areas with some super duper vacuum equipment. She doesn't want any disruption this side of Christmas, I'll probably suggest going on holiday for a couple of weeks in Feb/March.

Lack of sanding would not mean a rip out and redo if the resin is such that it impregnates the top of the screed as it would replace the epoxy. Bit like sticking your tiles back down with araldite..

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Its a couple of miles outside of Grantham Alan, Barkston if you have heard of it. Thanks for the offer, I'll definitely take you up on that when I come to do the job.

Pyres I know barks ton. Only live down the a1 in Stamford myself so reasonably local.

 

[Mr Tiler]

bluddy hell bri not only do hey have to pay your extortionate prices but they have to go and pay for a holiday too lol

 

[Ian]

Lack of sanding would not mean a rip out and redo if the resin is such that it impregnates the top of the screed as it would replace the epoxy. Bit like sticking your tiles back down with araldite..

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Pyres I know barks ton. Only live down the a1 in Stamford myself so reasonably local.

I have spoken to the developer and he assures me that the floor was sanded but, it might not have been dry. He doesn't know what adhesive/primer was used. I'll need to investigate a little further before I choose a plan of action.

 

[Stef]

Keep us informed Bri as this will be interesting.

 

[Ian]

Keep us informed Bri as this will be interesting.

It'll probably be a few weeks before I get to look at it, end of Jan is the earliest. I'm very interested to see what's underneath, maybe the spot fixing method has been used :lol: