Advice on type of flooring for damp Quarry Tile floor

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We have two 17th century cottages attached to our village hall that we rent out. Both have recently been refurbished including internal insulation, gas CH, new kitchens carpets etc.
Like a lot of older properties the bathroom is on the ground floor off the kitchen and both rooms have old quarry tile floors. I suspect there are on concrete over-site with little or no DPM.

To improve the floor we had the quarry tiles covered with self levelling compound and laid a one piece length of vinyl through both kitchen and bathroom without any joins.

Unfortunately the tenant is now complaining that he vinyl floor has "bubbled/rucked" up in several places. I suspect this is water vapour coming up through the quarry tiles and unable to escape due to vinyl acting as a barrier.

The ideal would be to lay a floating insulated floor and new vinyl finish but that would men ripping out the newly installed kitchen and bathroom, plus the ceiling height is very low and door thresholds level with floor.
Could we re-lay a moisture breathable vinyl or perhaps vinyl tiles that may allow trapped vapour to escape between joints? Failing that something radical like rush matting????

Any advice would be appreciated as although we are keen to satisfy the tenants concerns the amount of money already spent on these cottages has almost bankrupt the charity.
Fozzie Bear
 
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Altro expresslay vinyl might be worth a try.
We have used it on a few problems floors

Or go with a liquid dpm on top of the screeding compound.
 
Many thanks Dazlight. The Altro Expresslay seems a possible solution and the company is just up the road from us so could get a rep to call in and look at floor? Ironically we have Altro in Village Hall and never gave it a thought :)
 
the thing is, in an old building all possible factors should have been taken into account by a due diligent builder an submitted with a price to you or your committee before any work started

the odds are that thers no DPM under the concrete floor.
the best practice solution is to dig out the current concrete floor and pour concrete over a DPM and insulation.

you say thats not possible due to costs.
but without knowing more details about the site its hard to advise you - another thing is that most temporary solutions can cost more in the long run.

read dazlight's answer to a similar garage floor problem from yesterday.
 
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Trouble is, you've taken an old, breathable quarry tile floor, and put something impermeable over it. What was wrong with the quarry tiles in the first place?
 
Trouble is, you've taken an old, breathable quarry tile floor, and put something impermeable over it. What was wrong with the quarry tiles in the first place?
The quarry tiled floor had been covered with old asbestos tiles in the 50's or 60's stuck down with black bitumen. Many of these being brittle had broken or lifted leaving an uneven and unattractive floor. They were chopped off before self levelling compound was put down which left the black bitumen all over the tiles. Clearly this would not be acceptable and in any case was a very cold floor which we were asked if we could improve on hence the vinyl. Note this was also in the bathroom so not very nice in bare feet.
 

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