Exterior Home Painting Difficulties

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Exterior home painting has its very own challenges and problems. We tend to see a lot of problems after the completion of entire painting procedure. These are few of the difficulties that one faces after the exterior home painting is done.

Blistering

The main cause of this problem is exposure of the paint coating to dew, high humidity, or rain shortly after drying. Painting over top of a surface contaminate such as dirt, grease, etc. can cause a loss of adhesion and cause this symptom. Excessive heat can cause problems with freshly applied paint when it’s put over a surface that’s too hot, usually due to prolonged exposure to direct sunlight.

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Alligatoring

This is a condition that’s unique to oil-based paint.  Although the use of oil-based paint is not as common these days, at one time it was widely used.  Oil-based paints are not nearly as flexible as their commonly used cousin, acrylic latex.  As the oil coating ages it often will split and crack because it can’t expand and contract with the surface beneath.  Sometimes this condition happens quickly when new oil-based paint is applied over a flexible coating. Alligatoring is basically patterned cracking in the surface of the paint film resembling the regular scales of an alligator.

Chalking

Chalking is the 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. The reasons for such an effect is use of low grade and high pigmented paint or it can also be because of using interior home paint for exterior painting.

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Cracking/ Flaking

Cracking is the splitting of a dry paint film through at least one coat, which will lead to complete failure of the paint. Early on, the problem appears as hairline cracks; later, flaking of paint chips occurs. It happens due to the use of a lower quality paint that has inadequate adhesion and flexibility, over thinning the paint or spreading it too thin, poor surface preparation, especially when the paint is applied to bare timber without priming, painting under hot or windy conditions that make water-based paints dry too fast.

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