Plastering between beads

by Carl
(Bath)

Hi Paul

I'm loving your website and I always end up referring to the videos when things don't go to plan, its an absolute godsend.

This time I'm plastering purlins in my ceiling, and these purlins are lined with p/board and with angle beading on the edges. As my float is long enough to span two angle beads on opposing edges, would it be appropriate to apply a single coat of multi finish? I'm thinking that a single flat coat can be achieved by running the float along two opposing beads (like a train on a track), and its trickier to apply a thin 1st coat in this narrow area whilst leaving enough depth for the 2nd coat. Is there a reason not to apply one single coat in this circumstance?

Thanks once again

Carl

Answer
Hi Carl,

No that is absolutely fine to do this - it is normal practice to use this method - but to use your trowel instead of the float.
The 2nd coat will be needed though as the odd hollow may be left after the 1st coat, which the 2nd coat will then fill. But more importantly the 1st coat as it dries and firms up can shrink slightly - so this 2nd coat is crucial (even though it may be very thin and non existent in some areas).
The time delay between coats is important - so ensure the 1st coat has firmed up a little and is putty like (it's pliable but will not lose shape and flatness as when wet).
You can try using the float in the earlier stages but your trowel may be the safer option.

Paul