I've got a floor to finish tomorrow which "bows". It dips by about 10-15mm at the sides from the middle. I'm fixing 600 x 300 porcelain in brickbond so really need to keep it flat. Was thinking about using BAL PTB but wondered if anyone can recommend an addy that will allow me to pack out by 15mm?

I can get Mapei, Biscem, Ardex, Everbuild and some BAL (PTB is hard to source) locally.

Any recommends are greatfully received.

BTW the floor has 'lectric UFH too with a thin coat of levelling over (don't ask!)

keraflex maxi 3-15mm bed S1

'kin 'ell Whitebeam, that was quick!!!

Just checked the spec and it ticks all my boxes.
Top man! I'll be getting a van full of that tomorrow , got 20m2 to do.

After re-reading the spec, I can't grout for 24 hours. Can anyone recommend a rapid set?

Beat me to it

What about a slc to bring up the surface and use kearaquick, think that a 7mm bed bit more rapid

How screeding up with Mapei P4, then tile over when set ?
Suitable for UFH & Porcelain, rapid setting, thickness 3 - 20mm
MAPEI - PDF Flip Pages

http://www.mapei.it/Referenze/Multim...silexP4_gb.pdf

Phone Mapei technical dep't if unsure to check limitations and suitability, they are very helpful

P4 could be a good shout.
Depends if my local Mapei outlet has it in stock.

Originally Posted by Captain Slow

P4 could be a good shout.
Depends if my local Mapei outlet has it in stock.

That is the question !! You will find that most Mapei stockists do not carry the whole range !!!

Have you started job yet ? Are you doing by yourself ?
Seems a tall order to fix 20M brick bond bedding up so much - finished in a day if alone ??
Not sure of the situation but I would be tempted to try and persuade customer for self level option, then tile next day on a nice flat surface !!

Long story Nick,

Yeah I'm doing it on my own. Self levelling is not an option. Gonna have to build out with addy. Got a couple of days to do this but gonna have to use Saturday as well 'cos I wont finish on Friday - Doh!

"Long story Nick"
would like to hear it anyway ?

Brief summary....

Floor screed all over the place.
UFH laid and Ardex NA floor smoothing applied.
45m2 so 11 bags were applied - not enough! (nothing to do with me) although I was asked to apply slc
Advised customer that a lot more slc is needed due to floor discrepencies but declined.
Managed to cover UFH but not all of floor area and def not enough to give a smooth floor.
The headache begins!

And you want to tile it...?.......

I like a challenge Dave!

Too late to turn back so I need to make the best of a bad situation.

used BAL`S ptb,it will give you 3mm to 25mm and sets in 3hrs, abit longer what with the cold temperature at the mo.