D
Daz
I have an area of 42sqm to tile with 20mm thick limestone (4 colours of varying lengths upto 700mm, with and without fossils).
The substrate is wet UFH which has ben down for 7 years. There are Norfolk quarries stuck on top. That lot is to be covered with slc by a screed / latex specialist.
I told the customer that I would insist on a decoupling membrane as there is too much opportunity for thermal movement IMO and failure with the limestone. The stone supplier has said that there is no need for a decoupler as the UFH has been down for 7 years, so the customer is now questioning my advice .
Is the stone supplier just assuming I am using it as a vapour equalisation barrier, or is there really no need for it?
What would you do, please?
Cheers,
Daz
The substrate is wet UFH which has ben down for 7 years. There are Norfolk quarries stuck on top. That lot is to be covered with slc by a screed / latex specialist.
I told the customer that I would insist on a decoupling membrane as there is too much opportunity for thermal movement IMO and failure with the limestone. The stone supplier has said that there is no need for a decoupler as the UFH has been down for 7 years, so the customer is now questioning my advice .
Is the stone supplier just assuming I am using it as a vapour equalisation barrier, or is there really no need for it?
What would you do, please?
Cheers,
Daz