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Chalking

Exterior Paint Solution

 
 

Chalking: Formation of fine powder on the surface of the paint film during weathering, which can cause color fading. Although some degree of chalking is a normal, desirable way for a paint film to wear, excessive film erosion can result in heavy chalking.

Possible Causes:

Use of a low-grade, highly pigmented paint.

Use of an interior paint for an outdoor application.


Solution:

First, remove as much of the chalk residue as possible, using a stiff bristle brush (or wire brush on masonry) and then rinse thoroughly with a garden hose; or use power washing equipment. Check for any remaining chalk by running a hand over the surface after it dries. If noticeable chalk is still present, apply a quality oil-based or acrylic latex primer (or comparable sealer for masonry), then repaint with a quality exterior coating; if little or no chalk remains and the old paint is sound, no priming is necessary.

 
 

 

 
 
 
 
Exterior Paint Problems

 

Alligatoring
 

Blistering

 

Chalk Run down
 

Chalking
 

Cracking Flaking

 

Dirt Pickup
 

Efflorescence - Mottling
 

Fading-Poor Color Retention
 

Frosting

 

Lapping

 

Mildew

 

Nailhead Rusting

 

Paint Incompatibility

 

Peeling
 

Poor Galvanized Metal Adhesion
 

Poor Alkali Resistance
 

Poor Gloss Retention

 

Surfactant Leaching

 

Tannin Staining

 

Vinyl Siding Warp

 

Wax Bleed

 

Wrinkling

 

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