Paint With Confidence

Exterior Common Issues & Solutions

Lapping

Text & image courtesy of the Rohm & Haas Paint Quality Institute

Lapping

Appearance of a denser color or higher gloss where wet and dry layers overlap during paint application.

Possible Cause

Failure to maintain a “wet edge” when applying paint.

Solution

Maintain a wet edge when painting. Avoid painting in dry, breezy conditions. Do not paint in bright, direct sunshine. Avoid painting a surface that is hot from bright sunshine. Minimize the area being painted and plan for interruptions at a natural break, such as a window, door or corner (especially important when applying stain to bare wood). Alkyd paints generally have superior wet edge properties.