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Solving Problems

November 5, 2018

Excessive Chalking: Causes & Solutions

   Excessive chalking is a common issue that looks precisely as you might imagine: a powdery, dust-like layer that [...]

November 5, 2018

Peeling Under Eaves

    Generally, the elements have a deleterious relationship to exteriors, causing wear and damage that can end in [...]

November 5, 2018

The Mystery of Peeling Paint

An estimator is a kind of investigator, the mystery of peeling paint a kind of detective story.That's one [...]

November 5, 2018

Blistering Paint

You know what paint blisters look like: suddenly your smooth finish looks like the surface of the moon, [...]

September 24, 2018

Replacing rotted trim

Low-maintenance exteriors have become the gold standard for many customers. That's why engineered alternatives to wood, like composite, have only [...]
September 24, 2018

Peeling Plaster Walls

Plaster has a lot going for it: it resists mold and fire, insulates from noise-penetration, and offers homeowners a smooth [...]
September 24, 2018

EPA Guidelines and Danger

Q: Why follow EPA lead guidelines, and what are the dangers of not doing so? A: Until 1978, [...]
September 24, 2018

Avoiding Ice Dam Damage

We hope everyone stayed warm and safe during the snowstorm. With the large amount of snow and temperatures flip-flopping above [...]

   Excessive chalking is a common issue that looks precisely as you might imagine: a powdery, dust-like layer that lays over the surface of your paint. In fact, if you type “excessive paint chalking” into a Google Image search, you’ll find photo after photo of hands that seem to have wiped down a blackboard without an eraser.

   Flat paints, white paints, and light-colored paints are at the greatest risk for excessive chalking. According to the U.S. Government’s Official Guidelines for Preserving Historic Homes, excessive chalking is generally attributable to either “the gradual disintegration of the resin in the paint film,” or to paint that “contains too much pigment for the amount of binder (as the old white lead carbonate/oil paints often did.)” Another common cause is overexposure to UV light—i.e. damage from the sun—which decays the bonds between the molecules in the paint film. There are, however, a few other possible diagnoses: over-thinned paint, old paint, low-quality paint, an unprimed surface, extended exposure to moisture, or bad initial prep, plain and simple.

    Excessive chalking can quickly lead to streaking, lightening, and, eventually, the wholesale erosion of your coating’s film. In short, it’s something you’ll want to take care of to avoid further damage. But how to go about correcting it?

    First off, you’ll want to buy a topcoat with strong UV resistance. While even the best paints may chalk a little, a quality finish will resist both cracking and the kind of excessive chalking that leads, over time, to more serious repairs. Before repainting, you should always make sure to prepare the surface properly. In this case, that means removing all chalk residues from the surface, and time to let the surface dry. Do a quick test with a finger to see if any powder still remains, and—if so—repeat the cleaning process. Then you’re ready to repaint over the dry, clean surface.

 

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