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 USA
-> For Your Home
-> Problem Solver - Exterior
Problem Solver - Exterior
All exterior paint problems are correctable—find the right solution here. This section lists a variety of exterior paint problems. Simply select the problem you have to find the remedy. Note: Images provided by The Rohm & Hass Paint Quality Institute.
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Blistering
Bubbles appear on the surface of the paint resulting from localized loss of adhesion and lifting of the paint film from the underlying surface.
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Chalking
Chalking occurs when the paint film decomposes into a loose powder on the surface. Some degree of chalking is normal, but excessive film erosion can result in heavy chalking.
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Chalk Run-Down
Chalk run-down is the washing down of chalk from an excessively eroding paint onto
another area.
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Cracking or Flaking
Cracking or flaking is the splitting of a dry paint film through at least one coat, which can lead to
the complete failure of the paint.
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Dirt Pickup
This occurs when dirt, dust particles, or other debris accumulates on the paint film. This may resemble mildew.
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Efflorescence or Mottling
Efflorescence or mottling is crusty, white mineral salt deposits. These can leach out to the surface on mortar, concrete, or masonry surfaces.
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Frosting
Frosting is a white, salt-like discolored substance on the paint surface. It is most noticeable on dark tints.
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Lap Marks
Lapping is the appearance of a denser color or higher gloss where wet and dry layers overlap during painting.
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Mildew
Mildew appears as black, gray, or brown spots or areas on the paint film or caulk bead.
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Paint Incompatibility
Paint incompatibility causes the loss of adhesion between coats were old coats of alkyd-based paint was painted over with latex.
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Surfactant Leaching
Surfactant leaching is a concentration of water-soluble ingredients in latex paint leaching out to the paint surface, often creating a brownish blotchy or shiny appearance.
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Tannin Staining
Tannin staining appears as a brownish or tan discoloration on the paint surface from wood tannins migrating from the substrate through the paint film.
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Wrinkling
Wrinkling manifests as a rough, crinkled surface that occurs when paint forms a "skin."
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