03/09/2026
Before you open a tin this spring, one question matters more than the colour. Is the wall actually dry?
Not dry to the touch. Dry as in under 15 percent moisture content, which is the maximum a wall should carry before top coats go on. Paint over a wall that is still holding winter water and it will blister, usually about three months later.
Our new guide from Herman Rabe, our Technical Training Manager, walks through the inspection properly.
✔ What to look for - chalkiness, friable plaster, loose and flaky paint, fungus
✔ The crack repair sequence - open cracks to at least 5mm, wash with Fungal Wash, prime with Damp Cure, wait the full 24 hours, fill, then prime and wait again
✔ Where Damp Cure helps and where it does not - it handles up to 40 percent while new plaster dries, but it will not stop constant damp from a retaining wall. That needs waterproofing, not primer.
✔ Choosing by exposure rather than by colour
Sound, clean and dry. Everything else follows from that.
Read the full guide, link below.
🔗 https://1l.ink/QHM633M