Substrate Raising

[kimboslash]

Hi all,

Looked at a job on Friday (new build) where the customer originally wanted a thick basalt stone tile and then decided to go for a thinner porcelain tile - so now they are asking a for an adhesive bed of 25mm over 100m2 of screed (with wet UFH).

The finished tile height needs to remain the same regardless of the thinner tile so what is the general consensus of the best way to build up the floor allowing for a much smaller bed of adhesive?

 

[Ajax123]

Lay an unbonded layer of TS15 or TS20

 

[Dan]

I'd assume more screed? can you add 20mm or so of screed or is that not enough?

 

[Ajax123]

Broken Link Removed

 

[widler]

I like the look of that alan, what would the price differance be to say self leveling itfor 100m2 at 25mm you would probably need 1bag per m2 ish, so say £2000 ish in matts then labour, im guessing here while bored while the wife watches corrie

 

[Rizzle from the Portizzle]

Hi all,

Looked at a job on Friday (new build) where the customer originally wanted a thick basalt stone tile and then decided to go for a thinner porcelain tile - so now they are asking a for an adhesive bed of 25mm over 100m2 of screed (with wet UFH).

The finished tile height needs to remain the same regardless of the thinner tile so what is the general consensus of the best way to build up the floor allowing for a much smaller bed of adhesive?

can you lay tiles into wet sand and cement

 

[Ajax123]

I like the look of that alan, what would the price differance be to say self leveling itfor 100m2 at 25mm you would probably need 1bag per m2 ish, so say £2000 ish in matts then labour, im guessing here while bored while the wife watches corrie

Where in the country are you. I can get you a price sorted? No obligation of course but I would think it would come out better than bagged levelling compound as its a ready mixed product. I also think from memory 1x25 kg bag of levelling compound usually does about 1m2 at 10mm although I'm happy to be corrected.

 

[Ajax123]

can you lay tiles into wet sand and cement

You can lay it unbonded so put a polythene slip membrane over the sand cement and then pour minimum 15mm of it on top.

 

[Dan]

Most SLC can't go deep. You have to start adding things to it to bulk it out.

 

[Ajax123]

Most SLC can't go deep. You have to start adding things to it to bulk it out.

Or lay in several layers. There are compounds that can go deep but it becomes a cost thing and thick cement based compounds can be prone to shrinkage cracking and can only be laid bonded.

 

[Ajax123]

You can lay it unbonded so put a polythene slip membrane over the sand cement and then pour minimum 15mm of it on top.

Sorry. I misread your your question....

 

[Rizzle from the Portizzle]

why has such an easy job to do. at low cost .become a high cost job

 

[Rizzle from the Portizzle]

ok here you go sub the job out to tilers who know how to fix in wet sand and cement should be no problem for them this will save you over £41 m2 in levelers decouplers adhesive labour before you lay a tile sit back watch how it should be done and make a few grand and save the same for your client

 

[Dan]

Because there's a woman involved who's changed her mind, again. Haha

why has such an easy job to do. at low cost .become a high cost job

 

[Just Rizzle]

forgott to ask what type of sub straight is it?
think every one is assuming its cement based or is it anhydrite the ufh is layed in?