Most exterior paint problems and
painting mistakes are correctable. Here are solutions for the most common
exterior painting problems.
courtesy of The Paint Quality Institute)
Patterned cracking in the paint film resembling alligator hide, leading to total paint failure.
Paint blistering causes bubbles to appear on the painted surface due to localized loss of adhesion and lifting of the paint film from the substrate.
Paint chalking occurs when the paint film decomposes into a loose powder on the substrate. Some chalking is normal, but too much film erosion can result in heavy chalking.
Paint chalk run-down occurs when chalky residue from an excessively eroding paint washes down onto another area of the substrate surface.
Paint cracking or flaking results in the splitting of a dry paint film through at least one previous coat, which can lead to the complete failure of the paint.
Paint dirt pick-up refers to the accumulation of dirt, dust particles or other debris on the paint film. The appearance sometimes resembles mildew stains.
Efflorescence or mottling is crusty, white mineral salt deposits. These can leach out to the surface on mortar, concrete, or masonry surfaces.
Premature or excessive fading of color often occurs on exterior surfaces facing southern and western exposures.
Frosting is a white, salt-like discolored substance on the paint surface. It is most noticeable on dark tints.
Lapping is the appearance of a denser color or higher gloss where wet and dry layers overlap during painting.
Mildew appears as black, gray, or brown spots or areas on the paint film or caulk bead.
Nailhead rusting appears as reddish-brown stains on the paint surface.
Paint incompatibility causes the loss of adhesion between coats were old coats of alkyd-based paint was painted over with latex.
Poor alkali resistance can cause color loss and overall deterioration of paint film on fresh masonry.
This occurs when paint has lost its adhesion to a galvanized metal substrate.
Poor gloss retention causes a rapid loss of gloss in the topcoat.
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.
Tannin staining appears as a brownish or tan discoloration on the paint surface from wood tannins migrating from the substrate through the paint film.
Vinyl siding warps or buckles after it has been repainted.
The paint is discolored by waxy components found in wood products.
Wrinkling manifests as a rough, crinkled surface that occurs when paint forms a "skin."
Note: On-screen and printer color representations may vary from actual paint colors.