underfloor heating

[Ajax123]

No adhesive will prevent tiles and screeds from moving. You uncouple natural stone to help prevent differential movement. Unless the adhesive I made from elastic I would still uncouple.

also it sounds like the screed s no laid correctly as this should have movement joints. This leaves it prone t cracking which means an unstable screed. Fail to uncouple this and I think it will fail

 

[Mark S]

Totally agree with Ajax on this, should have joints in, and be de coupled.

 

[bugs183]

Yes they insist that you use there grout,there tech said the problem they face
is that British standards say that decouple should be used on wet ufh in screed,
as ajax pointed out to me,and most tilers are reluctent to change,even though
its cheeper and much quicker to do the whole job.

Sorry matey, but this adhesive really does sound too good to be true.
You really are better off uncoupling on u'f'h floors, be it stone or porcelain. Sometimes the time and the cost outweigh the problems that could happen.

As Ajax says (and he's the screed Guru) failure to uncouple could be costly. Would Granfix pay for the whole job to be replaced or just the cost of the adhesive?