J
jonnyc
I laid approx 160 sq mts polished grey jura limestone 900x 600mm 7 months ago
screed laid four months before.
Ditra used.
Stone set in fast set adhesive.
Job took just over two weeks to lay
checked stone dry after 10-14 days by heating a stone with haidryer for 30 mins. No change in colour.
No condensation under plastic if left overnight.
Paper left overnight no damp.
So sealed with mn stainstop.
Grouted next day.
Washed floor next day .
Left stone further 2 days to let grout dry then last coat stainstop.
No problem so far.
Floor covered with building paper with tape on overlapping
joins but not stuck to floor as advised.
Some time later, 40% of floor had hardboard laid on top of paper and other 60% had cordex put on top of paper.
Paper had been removed round edges to skirt floor and now mixture of duct tape and masking atpe used to stick edges of covering to floor.
This was left like this for about 5 months i think and underfloor heating turned on.
When covers taken up recently the area covered by cordex and paper had many water type stains with a slight silver colour in it like salt, which must have been caused by sweating /condensation.
This stain seems to be right in stone not on top.
The stains look like following the paer that has rucked up/shrivelled when wet.
They are not cordex pinstripped lines.
Strangely there was no staining to stone where covered with building paper and hardboard.
Board must have sucked up condensation/sweating and surprsingly resin in board not gone in to stone as i feared would have happened.
Have tried to clean stone with wexa/power clean/stainaway/wax off and brickie(non acidic they said but it certainly is as took polish straight off stone)
none of these cleaners worked.
Builder has now uncovered floor again and turned on heating thinking that this will get rid of staining but i do not think this a moisture problem still in stone.
It is almost as if it is some kind of mould/salt reaction in stone from stone sitting on condensation for so long
has anyone had a similar problem and been able to rectify.
I think it needs some kind of mould salt cleaner that does not affect polished stone
stone fed has suggested a paultice over whole floor,but where to go for that .
Or perhaps regrinding floor but this may not work if deep in to stone.
There will also be the problem of glue residue from dukktape to remove .
What is best product that will not damage polished surface.
Any suggestions appreciated.
screed laid four months before.
Ditra used.
Stone set in fast set adhesive.
Job took just over two weeks to lay
checked stone dry after 10-14 days by heating a stone with haidryer for 30 mins. No change in colour.
No condensation under plastic if left overnight.
Paper left overnight no damp.
So sealed with mn stainstop.
Grouted next day.
Washed floor next day .
Left stone further 2 days to let grout dry then last coat stainstop.
No problem so far.
Floor covered with building paper with tape on overlapping
joins but not stuck to floor as advised.
Some time later, 40% of floor had hardboard laid on top of paper and other 60% had cordex put on top of paper.
Paper had been removed round edges to skirt floor and now mixture of duct tape and masking atpe used to stick edges of covering to floor.
This was left like this for about 5 months i think and underfloor heating turned on.
When covers taken up recently the area covered by cordex and paper had many water type stains with a slight silver colour in it like salt, which must have been caused by sweating /condensation.
This stain seems to be right in stone not on top.
The stains look like following the paer that has rucked up/shrivelled when wet.
They are not cordex pinstripped lines.
Strangely there was no staining to stone where covered with building paper and hardboard.
Board must have sucked up condensation/sweating and surprsingly resin in board not gone in to stone as i feared would have happened.
Have tried to clean stone with wexa/power clean/stainaway/wax off and brickie(non acidic they said but it certainly is as took polish straight off stone)
none of these cleaners worked.
Builder has now uncovered floor again and turned on heating thinking that this will get rid of staining but i do not think this a moisture problem still in stone.
It is almost as if it is some kind of mould/salt reaction in stone from stone sitting on condensation for so long
has anyone had a similar problem and been able to rectify.
I think it needs some kind of mould salt cleaner that does not affect polished stone
stone fed has suggested a paultice over whole floor,but where to go for that .
Or perhaps regrinding floor but this may not work if deep in to stone.
There will also be the problem of glue residue from dukktape to remove .
What is best product that will not damage polished surface.
Any suggestions appreciated.
