Paint flaking off the outside walls of your Wednesbury home? Why masonry paint fails, what the preparation should involve, and how to make a repaint last.
When paint flakes off outside walls, it is usually because water is getting behind it or the surface underneath was never sound. Rain soaking into cracked render, damp rising from ground level, or a leaking gutter can all push paint away from the wall. Paint applied over a chalky, dusty or crumbling surface has nothing firm to hold on to, and non-breathable paint on an old solid wall can trap moisture until it blows off.
A lasting exterior repaint is mostly about preparation. Loose and flaking paint is scraped and brushed off, cracks in render are filled, green growth is treated, and a stabilising solution is applied to any powdery surface so the new paint grips. Then a good, breathable masonry paint goes on in suitable weather, because painting onto a damp wall or before a frost is a common reason new paint fails early.
In Wednesbury, we see a lot of flaking on rendered and pebbledashed fronts on the estates around Friar Park and Wood Green, and on older brick terraces near Mesty Croft that were painted decades ago with paint that no longer suits them. Fixing gutters and cracks first, then preparing properly, is what makes the next coat last for years.
Usually water getting behind it, or paint applied over a chalky or unsound surface.
No. Loose paint must come off and the surface be stabilised first.
Many years, if the wall is sound, prepared properly and painted in good weather.
Spring to early autumn, on dry days without overnight frost.
Cracked render, rising damp and leaking gutters push paint off the wall.
Powdery old paint or render needs a stabilising solution before repainting.
Sort the water sources first, or the new paint will flake too.
Old solid walls need paint that lets moisture out.
Paint onto a dry wall in mild weather, never before a frost.
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