I I am painting a large interior wall on a barn converted house. On the chimney wall there there is a large (very large .. 50%) area of damp. The paint is not suffering, but feels sticky to the touch.
The previous decorator used stain blocker and it worked in the area he did it ........... even though the final emulsion coating looks lighter in colour there.
Chimney man is on his way to check at roof level etc.
Owner wants it painting now.
Before emulsioning ..
Options ......... ??
Use stain blocker (prob oil based undercoat) over complete wall.
A coat of PVA
A coat of SBR
I pointed out that they must find the cause rather than a complete bodge.
Would any of the above options hold back the damp in the short term ?
Mike P the 1st