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?

[Dave]

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

[Dave]

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

[garythetiler]

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

[Dave]

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

[deanotile]

[Grace'sDad]

Love the Green Screed - well recommended by me - big thumbs up

[whitebeam]

Great stuff to use, Have'nt used in while though

[Dannym80]

Firstly, thanks for all the responses - most useful! I've looked into the price side of things and it turns out screeding is what the customer would rather go for. Having only done it once or twice before, can anyone tell me roughly how much sand & cement I'd need? the floor area is approx 10m/sq & I'd like to get a 20mm thickness

[whitebeam]

Probably would be best getting bags of sand working on 25kg bags about 20 sharp sand and again about 5 dust it's quite a thin screed. What i would do is get some sbr 50/50 with water mixed with cement and a small amount of sand to give you a slurry coat on the floor to start but do the slurry as you screed sticks better that way. Use the sbr at 50/50 with water for the screed just to strenghen it a bit and it makes it a polymer screed, Thats makes very strong and keep your tools clean sbr sticks like no other IMO

[deanotile]

[MICK the Tiler]

Same as my Photo Isn't it

[Dannym80]

Again people, thanks for your responses & help, I've actually found a mate who does internal/external screeding, landscaping, paving etc. so I plan to watch & learn while he screeds it for me!!

[David - Tradetiler]

Deano, to save you taking a picture of your monitor with a camera. Just press the 'print screen' button on your keyboard (nothing will happen) then open your photo editor or Word etc then right click and paste. Hey presto your screen shot is now a picture you can edit/crop/upload etc

[David - Tradetiler]

Mind you, looks like it is all ready a picture in word etc so you could have copied and pasted any way