Yes, exterior paint should ideally be applied in thicker coats to provide optimal coverage and protection.
Here's why thickness matters for exterior paint:
-
Coverage: Thicker coats of paint, typically aiming for 4-6 mils per coat, provide better coverage of the underlying surface. This reduces the likelihood of needing multiple coats to achieve the desired color and hide imperfections.
-
Protection: Exterior paint acts as a barrier against the elements, including sunlight, rain, and temperature fluctuations. A thicker coat provides a more robust and durable barrier, protecting the substrate from damage.
-
Longevity: Because thicker coats offer better protection, they contribute to the longevity of the paint job. The paint is less likely to crack, peel, or fade prematurely.
-
Cost-Effectiveness: While it might seem counterintuitive, using high-quality paint applied in thicker coats can be more cost-effective in the long run. Because of superior coverage and protection, fewer coats are necessary, potentially saving on material and labor costs.
It's important to note that the "thickness" refers to the wet film thickness during application, which affects the dry film thickness after the paint cures. Always consult the paint manufacturer's recommendations for the ideal wet film thickness and spreading rate.
