hi little
just read the depth of which you are patching...
right, heres some advice you should take note of.......
if you are putting on 15mm of bonding/hardwall, then because its designed to be applied
by the book at 11mm and you are putting on 15mm
i would do a scratch coat of around 8mm, allow it to pick up (firm up and change to a darker colour
approx 1 to 1 and a half hours and
then put the 2nd 7mm coat on, then leave it to set a bit longer than normal (around 4-5 hours and then skim..
if you put too much on in one hit, it will shrink and crack!! so build up the layers and control the drying/setting/suction time...
any probs just fire away with the questions

ed