Exterior Paint Problem Solving

Alligatoring

Description

Many wide patterned cracks in the paint film with the appearance of alligator scales.
Probable Cause & Solutions

 


 

Blistering

Description

Dome shaped paint bubbles indicating loss of adhesion. Can occur in isolation or groups.
Probable Cause & Solutions

 


 

Chalking

Description

Excessive and heavy powdering. Paints chalk naturally somewhat over long exposure to sun and weather.
Probable Cause & Solutions

 


 

Cracking / Flaking

Description

Aging, dried paint starts with hairline cracks. Eventually cracking to the surface.
Probable Cause & Solutions

 

 



Dirt Staining

Description

Excessive collection of dirt and other debris. Sometimes mistaken for mildew. Probable Cause & Solutions 

 

 

 

Efflorescence

Description

Crusty, white salt deposits leached from masonry or mortar as moisture passes through.
Probable Cause & Solutions

 

 


Fading / Color Retention

Description

Early loss of color or change usually from direct sun exposure. More pronounced with yellows and reds.
Probable Cause & Solutions

 
 

 

Frosting

Description

Salty looking discoloration, most visible on darker colors, sometimes mistaken for efflorescence.
Probable Cause & Solutions

 

 


Galvanized Metal Peeling

Description

It is an adhesion loss of the paint due to inadequate surface preparation. Probable Cause & Solutions

 

 

 


Gloss Retention

Description

An accelerated deterioration of the top coat causing rapid luster loss.
Probable Cause & Solutions

 

 

Lapping

Description

Occurs where wet and dry layers overlap during painting. Avoid with paint area management and technique.
Probable Cause & Solutions

 


 

Leaching (Surfactant)

Description

Blotchy usually tan colored glossy water soluble spots on latex paints. Probable Cause & Solutions

 

 

 


Mildew

Description

Areas of black, gray, brown spots formed in paint and other surfaces, particularly in damp, shady areas. 
Probable Cause & Solutions

 
 

 

Nail Head Rusting

Description

Rust spots come through the paint. Preventable with proper surface preparation and priming. 
Probable Cause & Solutions

 
 

 

Paint Incompatibility

Description

Causing adhesion loss from a top coat of latex over many layers of old alkyd or oil based paint.
Probable Cause & Solutions

 
 

 

Peeling

Description

Paint adhesion is lost and the loose paint starts coming off in single to multiple coats.
Probable Cause & Solutions

 
 

 

Resisting Alkali

Description

Results are color loss and complete deterioration of the paint on fresh masonry. 
Probable Cause & Solutions

 
 

 

Tannin Wood Staining

Description

Brownish discoloration that will come through prime/finish coats unless properly primed.
Probable Cause & Solutions

 
 

 

Under Eaves Peeling

Description

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 salts draws moisture through the paint.
Probable Cause & Solutions

 

Wax Bleeding

Description

Migration of waxy additives used in reconstituted wood products to the surface causing discoloration and possible wetting. 
Probable Cause & Solutions

 
 

 

Wrinkling

Description

Improper paint application (usually too thick) can cause paint to have a crinkled surface. 
Probable Cause & Solutions