self levelling?

[Dannym80]

I've got a conservatory floor to tile which itself is a straightforward job, its level & 98% smooth. However, the floor sits exactly 45mm below the level of the adjoining floor and the customer would like it as close to this as possible, we agreed a 5mm difference would be ok. They have the tiles which are 10mm thick, so along with the adhesive this still leaves at least 22mm to build up!!
Could self levelling compound be used to add say, 15-20mm? Or would the floor need a concrete screed? If concrete then how easy is it to do?

 

[DHTiling]

Mapei do a leveller that will go upto 30mm in one go...Ultraplan maxi......

 

[MICK the Tiler]

You could go either way, but SLC would be far more expensive it would also give a perfect finish. You could mix your own screed with plasterers sand and cement at a 4:1 ratio and get the levels spot on. I use a pair of screed sticks cut to the height I want then screed the cement mix flat onto the screed sticks then finish with a steel trowell

 

[GazTech]

If screeding with sand/cement, allow an inch per week drying time......Gaz

 

[DHTiling]

If screeding with sand/cement, allow an inch per week drying time......Gaz

Unless using your make of quick set cement eh.?..lol

 

[GazTech]

Unless using your make of quick set cement eh.?..lol

Yes Dave, but I'm trying not to advertise...

 

[Dannym80]

Thanks all, I'll look into the Mapei slc for definite, as thats something i'm a little more confident with, rather than a full screed!!

 

[MICK the Tiler]

Thanks all, I'll look into the Mapei slc for definite, as thats something i'm a little more confident with, rather than a full screed!!

Yes Screeds do take a little more practice

 

[GazTech]

Another option is to adhere some cement based boards down, this would raise the floor level, and is a flat surface to tile...
James Hardie Backerboard

 

[MICK the Tiler]

Good idea Gaz might save some coin

 

[Branty]

Unless using your make of quick set cement eh.?..lol

Or you fix into the screed

 

[top tiler]

use ultra level it1 goes up to 50 mm one hit its cheaper than mapei alllow 1bag per m2 at 15mm hopes this helps

 

[Spud]

i really cannot understand why any one would use levelling compound in this situation. it is quite obviuosly a sand and cement screed that is needed .which will cost a fraction of levelling compound

 

[DHTiling]

i really cannot understand why any one would use levelling compound in this situation. it is quite obviuosly a sand and cement screed that is needed .which will cost a fraction of levelling compound

Not everybody can screed gary....thats why levellers that can go that thick are manufactured.....i would screed as well but not all can do it..

 

[GazTech]

Not everybody can screed gary....thats why levellers that can go that thick are manufactured.....i would screed as well but not all can do it..

Also slc does not have the same long drying time as screed does...people want to tile as soon as possible once starting the job....Gaz :yes: