Deep, irregular cracks resembling dried mud in your paintwork is called mud cracking.

mud cracking

Possible Cause

Mud cracking can occur when:

  • Paint is applied too thickly, usually over a porous surface
  • Paint is applied too thickly, to improve inherent poor hiding (coverage) of lower quality paint
  • Paint build up in corners during application

 

Solution

Remove the cracked paintwork by scraping and sanding. Prime and repaint the surface with a premium water-based paint like Dulux Wash&Wear®, and use the correct roller sleeve (5mm nap for gloss & semi gloss and 12mm nap for low sheen and flat finish).

Sanding the surface smooth before repainting with a premium water-based paint can also repair mud-cracked areas. Premium quality paints have a higher solids content, which reduces the tendency to mud crack. They also have very good application and hiding properties, which minimise the tendency to apply the paint too thickly.


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