L shape limestone Opus on chipboard

[manxemmett]

:hurray:Hello , i am new to the forum and would welcome any assistance to avert a tiling tradgedy.

Background
Kitchen Project

Laying a 36M2 limestone floor on sound 18MMchipboard.
Board will be screwed at 6" intervals
(As an option I thought of possibly cutting out chipboard & replacing with ply to keep levels) - but on reflection thought this would be unnecessary and would get a good bond to the chipboard.
My preferred adhesive for floors is Mapei with flexible latex additive 8mm depth.
Sealer - any recommendations
Setting out:
The room is an L shape. I intend to go off the two walls on the internal angle. The long walls are extensively covered with cabinets.
Any advice is most appreciated.

 

[faithhealer]

Chipboard idea isn't good , for the sake of 6mm what about backerboard? quicker than taking the chipboard up

 

[Gazzer]

I wont tile onto chipboard especially a room of that size and with such a tile. Too many risks IMO.
Overboard with Tile backer boards would be the way i tackled it or replacing chipboard with ply.
As for sealer that would depend on the finish you required.

Which Mapei product have you chosen ? Keraquick ?

 

[marbleman]

I believe substrate question has been answered, as for coming off internal walls , you have checked them to see if they are square, i would measure a centre line on one, then use the 345 method to check the other side of the L- shaped room then you cant go wrong
regards
marbleman