Problem Solver
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Problem Solver - Exterior

Find solutions for a selection of exterior painting problems here.
Note: Images provided by The Rohm & Hass Paint Quality Institute.

Alligatoring
Many wide patterned cracks in the paint film with the appearance of alligator scales.
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Blistering
Dome shaped paint bubbles indicating loss of adhesion. Can occur in isolation or groups.
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Chalking
Excessive and heavy powdering. Paints chalk naturally somewhat over long exposure to sun and weather.
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Chalk Run-Down
Paint film erodes and the resulting residue appears chalky.
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Cracking/Flaking
Aging, dried paint starts with hairline cracks. Eventually cracking to the surface.
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Dirt Staining
Excessive collection of dirt and other debris. Sometimes mistaken for mildew.
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Efflorescence
Crusty, white salt deposits leached from masonry or mortar as moisture passes through.
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Fading
Early loss of color or change usually from direct sun exposure. More pronounced with yellows and reds.
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Frosting
Salty looking discoloration, most visible on darker colors, sometimes mistaken for efflorescence.
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Incompatibility
Causing adhesion loss from a top coat of latex over many layers of old alkyd or oil based paint.
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Intercoat peeling
Occurs in protected or shady areas where condensation collects sulfur dioxide from air. These salt like crystals are washed away by rain in areas not protected. Painting over these crystals will cause peeling as the salt draws moisture through the paint.
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Galvanized metal peeling
Is an adhesion loss of the paint due to inadequate surface preparation.
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Gloss Loss
An accelerated deterioration of the top coat causing rapid luster loss.
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Lapping
Occurs where wet and dry layers overlap during painting. Avoid with paint area management and technique.
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Surfactant Leaching
Blotchy (usually tan colored) glossy water soluble spots on latex paints.
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Mildew
Areas of black, gray, brown spots formed on paint or other surfaces, particularly in damp, shady areas.
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Nailhead rusting
Rust spots come through the paint. Preventable with proper surface preparation and priming.
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Peeling - Headboard/Wood
Paint adhesion is lost and the loose paint starts coming off in single to multiple coats.
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Peeling - Mansonry/Metal
Paint adhesion is lost and the loose paint starts coming off in single to multiple coats.
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No Alkali resistance
Results are color loss and complete deterioration of the paint on fresh masonry.
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Tannin wood staining
Brownish discoloration that will come through the prime/finish coats unless properly primed.
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Vinyl Siding Warp
Vinyl siding panels that have been repainted sometimes warp or buckle.
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Wax Bleeding
Migration of waxy additives used in reconstituted wood products to the surface causing discoloration and possible welting.
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Wrinkling
Improper paint application (usually too thick) can cause paint to have a crinkled surface.
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