Some good friends of mine did a self build just five years ago & had the exterior of their newly built home plastered with a napped render finish, but it seems that the extremely well paid plasterers weren't getting quite enough dosh out of it & decided to literally cut a few corners. Not only did they use an inferior quality supposedly galvanized angle bead that's rusting away, but it appears to add insult to injury they had applied it using an interior bonding plaster to stick the beading on to the scratch coat. . .So between the oxidization of the beading & the bonding absorbing moisture then expanding & cracking, my friends are left with somewhat of a mess. The plaster is cracking so badly around each & every reveal & all the external corners that its beginning to fall away.
They want to paint the house but obviously this issue has to be corrected first. . .
One fella that looked at it said that all the old beading would have to be angle-grinded off & new corners plastered in with no new beading. .just make new corners with plaster, another lad suggested redoing the same way only this time using a plastic corner bead.
Has anyone else come across similar problems with this type of angle beading & what do you think my friends should do to rectify the problem?