UFH cant be turned on for a while !

[Harry Grout]

Can I tile over a 3" Screed after 3 weeks drying time and then turn on UFH slowly after they are down ?

I'll be laying 60 x 40 1/2" Stone tiles

 

[DHTiling]

Is the ufh within the screed or matting type..?

 

[Harry Grout]

Is the ufh within the screed or matting type..?

I,m not sure Dave ? but if it is one or the other - would one be quicker drying - Its a concrete screed BTW

The client is renting a house and has to be in,in a months time :incazzato:

 

[DHTiling]

You need to find out as the in-screed type needs to be commissioned first..

 

[Harry Grout]

You need to find out as the in-screed type needs to be commissioned first..

I'll find out tomorrow and let you know - I've a feeling its not electric but pipes - can see the kingspan insulation in a couple of holes near the wall - Kitchen area is about 35 m2 , no sign of expansion joints in the concrete ?

If it is water pipes - 3 weeks natrual drying still isn't enough then !

 

[DHTiling]

What i mean is the ufh needs bringing upto temp and cooled again before you can tile that screed...and how deep is the screed..prob not dry enough yet..

 

[Harry Grout]

What i mean is the ufh needs bringing upto temp and cooled again before you can tile that screed...and how deep is the screed..prob not dry enough yet..

The concrete screed is 3" dave - Definately have to have the heat on then !

 

[doug boardley]

If you commision the heat before the screed is cured, you run a very real risk of a tile installation failure

 

[Harry Grout]

If you commision the heat before the screed is cured, you run a very real risk of a tile installation failure

Thanks for your post doug - so how long would you give a 3" concrete screed to cure (naturaly before tiling with no UFH)? and if I do tile (I would prefer to wait longer but the cleint is aware or the risk and is happy to go ahead and tile)should I just leave the heating off let the concrete dry naturaly under the layed stone and then turn the UFH on slowly at a later date ?

 

[DHTiling]

You MUST commission the ufh first before tiling....

The screed needs to expand and contract before applying tiles.....Me personally i would be using an un-coupling membrane with stone on a heated screed...but that's the way i work..