Mapei Keraflex coverage

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Hi, trying to figure out how much keraflex ill be needing.

The floor is currently relatively flat screed
The tiles are ceramic 615x205x8mm
Approx. 70sqm being covered

I have done a fair amount or reading and think I need a 10mm bed and want to use something slow setting as I'm no pro.


I have seen coverage figures for a 20kg bad of the keraflex range from 5sqm to just over 1

One adhesive coverage calculator said I need about 50 bags. A palette of 48 comes in at £766 delivered so I want to get the quantity about right to avoid having loads left over.

Has anyone used this adhesive?
Can you comment on coverage?
Is my 10mm bed correct? or should I go thicker?

Cheers.
 
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Did a bit more reading.. it looks like a 10mm trowel (or a 20x10 U trowel) will leave a 4mm bed, so I need more like 20 bags. not 50. :whistle:
 
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