We’ve had a problem with damp coming through the gable end of our property (built with industrial blue brick).
Having just re-pointed, capped a chimney and spent some time on the roof we’re hoping to have cured or atleast improved the situation.
Now at the point of rendering and plastering the walls and looking for some advice on the best way of tanking them so the plaster doesn’t pull any damp/staining through from the brickwork. A builder has recommended a bichumen based product that we can render directly onto but in my head this will trap the water in the mortar, being blue brick they won’t absorb any moisture so it has nowhere to go… Is that correct/a problem?
Is there a better alternative, some sort of membrane against the wall then plasterboard stood slightly off the wall maybe, or is this a perfectly good solution?
Any advice much appreciated, we’d rather go ott than risk need to re-plaster (again!).