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Exterior Paint Problem Solver
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Lapping
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Appearance of a denser color or increased gloss where wet and dry layers overlap during paint application.
Possible Cause:
Failure to maintain a "wet edge" when painting.
Use of a low-solids "economy" paint.
Solution:
Maintain a wet edge when painting by applying paint toward the unpainted area and then back into the just-painted surface. This technique (brushing or rolling from "wet to dry," rather than vice versa) will produce a smooth, uniform appearance.
It is also wise to work in manageable-sized areas. Plan for interruptions at a natural break, such as a window, door or corner. Using top quality latex acrylic paint makes it easier to avoid lapping problems because higher solids content (pigments and binder) makes lapped areas less noticeable.
If substrate is very porous, it may need a quality primer or sealer to prevent paint from drying too quickly and reducing wet edge time.
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