Mud Cracking

 
Mud Cracking

Deep, irregular cracks resembling dried mud in dry paint film.

POSSIBLE CAUSES

  • Paint applied too thickly, usually over a porous surface
  • Paint applied too thickly to cover poor hiding (coverage) when using a low quality paint
  • Paint is allowed to build up in the corners upon application

SOLUTION

Remove the coating by scraping and sanding. Prime and repaint using a high quality waterbased paint. Mud-cracked areas can also be repaired by sanding the surface smooth before repainting with a high quality waterbased paint. This type of paint is likely to prevent recurrence of mud cracking as it's more flexible than oil based paint. High quality paints also have higher solids content, which reduces the tendency to mud crack. They also have very good application and hiding properties, which minimize the tendency to apply too thick a coat of paint.

Source: The Paint Quality Institute

Newsletter Signup