underfloor heating

[philipb]

Worked on a new build recently,120 mts of limestone on wet ufh,tile supplier was pushing
a new adhesive from Granfix that goes down with no need to decouple.They
supplied a procedure which was done as they advised and its been down since
december with no sign of any problems.Granfix tech will advise on its use.
Saved a lot of money.

 

[White Room]

Worked on a new build recently,120 mts of limestone on wet ufh,tile supplier was pushing
a new adhesive from Granfix that goes down with no need to decouple.They
supplied a procedure which was done as they advised and its been down since
december with no sign of any problems.Granfix tech will advise on its use.
Saved a lot of money.

Does that include natural stone tiles....

 

[philipb]

Yes it does,they even said not to bother with expansion joints,they even
guarantee the job and advise that pics are taken at every stage so they can
check it in the event of a problem.They even send a rep if you want!
I was a bit worried but didn't need to be,job is spot on.Floor temp has been as
high as 50 deg c.

 

[White Room]

Do they have a grout which goes with the adhesive....

 

[philipb]

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.

 

[White Room]

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.

We have a rule of thought and stick to it, must admit can't get my head round it not to use decoupling.

 

[philipb]

Yes i know,i was the same,it seemed too good to be true,but it was fine.
There is a run of tiles that is 20 mts long with no expansion joint!

 

[White Room]

Jeeeez 20mts...

 

[philipb]

I will defo use it again,major saving in time and money,on a job like that
not having to decouple and all the adhesive it takes,just to get on
with it is major.It was £900 just for the membrane.

 

[MRM Tiling]

Hi
I presume you are laying the matting on a screeded floor.
expansion joints at doorways is good.
check screed is laid in one go,if the screed has been laid in different stages you will need to decouple where the join is,ask the customer if uncertain.
once mat or wire has been laid it will need testing,an easy test is to wire a plug on each matting and plug into the wall socket,this is safe up to 10mins but you will only need a couple of mins to know the its all working.
now you should use a latex based self leveling compound and cover the wires.
when dry do another plug in test then you can tile using flexi

hi its onto concrete with underfloor piping running throughout. its a hallway with a room to tile just off it then up 4 steps into a kitchen/diner and through into a big living room, all concrete screed and most probably seperately done. im working with the builder who did it all in the morning so il take the info u lads have gave me and put it to him and work it out, thanks