Which factor is responsible for peeling in painted wood siding when exposed to heat?

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Multiple Choice

Which factor is responsible for peeling in painted wood siding when exposed to heat?

Explanation:
Moisture in the wood or trapped under the paint is what drives peeling when heat is involved. Paint sticks best to a dry, well-bonded surface. When moisture is present, heating increases the vapor pressure under the coating, causing the paint to blister and lift away from the siding. With repeated heating and cooling, these lifted areas crack and peel more. UV exposure mainly causes fading or chalking of the surface, not the adhesive failure that leads to peeling under heat. Dust isn’t a primary cause, and while structural movement can crack paint, the heat-related peeling is best explained by moisture-induced loss of adhesion.

Moisture in the wood or trapped under the paint is what drives peeling when heat is involved. Paint sticks best to a dry, well-bonded surface. When moisture is present, heating increases the vapor pressure under the coating, causing the paint to blister and lift away from the siding. With repeated heating and cooling, these lifted areas crack and peel more. UV exposure mainly causes fading or chalking of the surface, not the adhesive failure that leads to peeling under heat. Dust isn’t a primary cause, and while structural movement can crack paint, the heat-related peeling is best explained by moisture-induced loss of adhesion.

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