Ditra or not...

[cam_low]

Quick survey please guys.

100m2 of glazed 60x60 porcs onto 1:4 S&C screed continuing through the house to concrete floors possibly needing SLC.

The cost is spiralling for the customer however I thought in my head I would use ditra for 2 reasons, 1) aiding the moisture release and 2) uncoupling to prevent any cracks under floor stress/movement.

I can not afford to not go belt and braces on this job so I'm either going to take it with ditra or walk. What would you do ? I have already had the answer I respect from a certain tiler how. Just thought I'd put it out there for you guys and your input.

Thanks very much.

 

[Ian]

How long had he screed been down Cam?

 

[CJ]

I find it really difficult to persuade customers to go the Ditra route........must be just my area?
People just don't like paying for wot they can't see......never mind the plus points of it.

 

[cam_low]

Few weeks. 92rh% max reading. 75mm screed on ins boards and dpm.

Heads done in advising this couple. Hes wanting me to start Monday. Green Screed add and ditra. Or 75 days drying?

 

[J Sid]

New screed i think you have to use it Cam. Old screed, no ufh, i wouldn't use it.
I think it is a walk away. Shame, sounds a nice job.

 

[Ian]

Green screed addy is a must, I can't decide whether I'd be willing to risk leaving the ditra off the spec list. It's a porcelain tile so in an ordinary situation ditra wouldn't be necessary. Much like yourself, I like to go belt and braces on every job, would I walk away if there was no ditra? In all honesty, I think I'd walk purely because of the moisture that's still going to be in that screed, will it debond the tiles? Will it discolour the grout? Maybe not but, it's a risk that doesn't need to be taken IMO. I think you've already decided what your going to do and you have to go with that.

 

[cam_low]

Im going to send the email. He does have other bathrooms for me to do that the builder attempted lol. I can crack those out first. See where we are at. 75th day with be 31th December. Exactly where I want to be on NYE lol.

Would the green screed addy be used to fix the ditra solely or both ditra and tiles ? Have you seen how much it is !!!

 

[CJ]

And I bet the builder has said "it's fine to tile NOW"

 

[John Benton]

As above, I think you would be taking too much of a risk and leaving yourself open for failure Cam, and it's your door they come knocking on mate!!!

 

[Ian]

Just green screed for the ditra, SPF to fix the tiles.

 

[cam_low]

how much m2 will I get from a bag for the ditra at 4x4?

 

[Stef]

Cam you can modify Weber set + with AD250 to go onto a green screed, save a fortune on Bal gear.
Think you can modify Weber Eco also but check 1st.

 

[Ian]

Tilemaster ultimate S2 is suitable for green screeds, you'll get 12 m2 at least from a 20kg bag.

 

[cam_low]

Ah this is sounding good as the whole order is coming from Lee@TT so I can give him a call tomorrow and change the requirements and hit him with the price !

any ideas on a bag price of TM Ultimate ?

 

[Ian]

Ah this is sounding good as the whole order is coming from Lee@TT so I can give him a call tomorrow and change the requirements and hit him with the price !

any ideas on a bag price of TM Ultimate ?

Not sure on price to us trade types, it's £19.95 on the web site though.