Badly stained limestone

[jay]

the sealer you have used im not familiar with it is it a top sealer or an impregnator

 

[spooner68]

no mate, it was a limestone cleaner I (think) I saw a builder use to clean polished limestone which had bloomed from under plastic sheeting. Think it a similar problem to Jonnyc's. Trying to find the stuff and the builder or client that used it (not my work I did ceramics in the bathrooms). Not having a lot of luck. check out teh full thread to see if you can shed any light for jonnyc.

 

[jay]

So sealed with mn stainstop.

i would try in a small area to strip the sealer off and see what it is looks like moisture under sealer

 

[spooner68]

yeah but the process jonny described meant the floor should be dry. Even with a cover on the stainstop should stop any downward penetration. Though that certainly looks like its come upover. Had a chat with a marble lover today and he said find someone to strip, polish and seal it. I wonder what it would have been like if it hadnt been covered. jc says he's done loads and not had a problem so why this one. Is it the stone itself? Too wet too long in storage or shipping?

 

[jay]

remember the floor hadn't been commissioned before sealing any moisture in the slab would of been forced to the surface on commisoning. it doesn't take much moisture to do it
i could be wrong

 

[spooner68]

remember the floor hadn't been commissioned before sealing any moisture in the slab would of been forced to the surface on commisoning. it doesn't take much moisture to do it
i could be wrong

so who's at fault? Is there a solution? Who pays? Glad its not me. Just priced up a new orangery floor and have added a paragraph about commissioning the UFH (now to be standard in my UFH stone floor quotes). It'll upset the kitchen people cos it will add time to the job but hey I dont want to have 55m of stained limestone on my plate.

 

[jay]

the solution is to allow the slab to dry and follow the recomendations with underfloor heating , commissioning before fixing of tiles
in other words you cant rush the job
if you cut corners it might come back and bite you

 

[jay]

as for whose at fault,,, because the area affected by being covered in plastic is damaged .might be the first port of call who decided to use plastic (as plastic laid on bare concrete will make it sweat or attract moisture) the reason i think it has effected the sealer is because the moisture has no were to go . the other area could breath and allow moisture to escape, but not were the plastic was used,

 

[jonnyc]

thanks for trying to get that tel no.

i treied calling the states contact tel no but all they have is some ridiculous system asking for your pin no ,whatever that is and tel no. so cannot get through to them.
have emailed but no reply.

regarding floor have now had a marble company do test where they use diamond pads and repolished.
the stain did go so it must only be the fraction of mm of stone.
just worried about matching the newly polished floor up to rest of area and stairs.
was hoping to find a miracle cleaner without taking polish off.

 

[jonnyc]

its not moisture from screed as that had dried for 5 months and had ditra on top.
restoration company are sure it is from moisture in air under plastic which was taped to floor so could not breathe at all.
this caused some condensation where siting on top of stone.
thanks for thoughts