I had this door put in but it was all a bit ad hoc so the door reveal was too wide and some add-on pieces were put on (I don't know what the correct term for them is). The interior emulsion is starting to spot with mold along the inside of the frame so obviously it isn't sealed. I think the renderers realised that maybe I didn't know my subject, put corner expamet on and left it at that.
I was thinking of adding some wing stops to bring the render over 10mm or so past the interface between frame/add-on. Then after painting maybe run a bead of exterior sealant up each inside edge?
Does this sound right?
Also, is there a dedicated sealing type tape or strip that's I'm supposed to cover the frame/add-on joint with, before I bury it behind render?
