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Close up image of patterned cracking in the surface of the paint film resembling the scales of an alligator.

Alligatoring

Patterned cracking in the surface of the paint film resembling the scales of an alligator.

Causes

  • Painting a warm surface in direct sunlight.
  • Application of oil-based or alkyd paint over a damp or wet surface.
  • Moisture escaping through the exterior walls (less likely with latex paint than with oil-based or alkyd paint).
  • Exposure of latex paint film to dew, high humidity or rain shortly after paint has dried, especially if there was inadequate surface preparation.

Solutions

  • Determine if blisters are attributed to heat or moisture by opening the blisters and examining the backside of blistered paint.
  • If only the most recent paint applied has blistered, the blister was probably caused by heat. Remove blisters by scraping, then sanding; prime any bare wood and repaint with a high-quality exterior paint in the desired sheen.
  • If blisters go down to the substrate, the blister was probably caused by moisture. In this case, remove blisters and more importantly remove the source of moisture. Prime all bare areas with a high-quality primer. Repaint the surface with a high-quality paint in the desired finish.

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What Sheen Do I Need?
8 Oz. Sample
1 Gallon
1 Quart
5 Gallon
The following product(s) is required to properly prep and pre-treat wood prior to any stain project.
Required product
BEHR PREMIUM ALL-IN-ONE WOOD CCCC
$0.00
The following product(s) is required to properly prep and pre-treat wood prior to any stain project. Only available in store at Home Depot.
Required 3rd party product
BEHR PREMIUM ALL-IN-ONE WOOD CCCC
The 9 in. x 1/4 in. Polyester Adhesive Roller Cover has a hard texture, making it ideal for applying all types of adhesives to smooth surfaces. It can be used for stippling and applying sand paints.
The following product(s) is recommended when stripping is needed.
$0.00
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