Priming bare siding before applying a second coat of exterior latex paint is a beneficial step in ensuring a successful and long-lasting paint job. Bare siding tends to be porous and uneven, which can affect the way the paint adheres and appears on the surface. Using a primer helps to seal the surface, creating a uniform base that enhances the adhesion of the paint while also providing a consistent surface for the paint to adhere to. This step is particularly crucial if the surface has variations in porosity or if you're switching between different types of paint, as it promotes better coverage and a more uniform finish.
Moreover, primer acts as a barrier, preventing the absorption of moisture and other elements that can potentially affect the siding's condition over time. By creating this protective layer between the siding and the paint, primer helps improve the durability and longevity of the paint job. It can also aid in blocking stains and tannins from bleeding through the new paint, ensuring a cleaner and more professional-looking finish.
Skipping the primer on bare siding may result in uneven coverage, decreased adhesion, and a shorter lifespan for the paint job. Even if the paint claims to have primer properties or is labeled as a paint-and-primer-in-one, applying a separate primer on bare siding remains a recommended practice to achieve the best results and ensure the integrity of the exterior paint job. Overall, the extra step of priming before applying a second coat of exterior latex paint on bare siding can significantly contribute to the overall quality and durability of the finished paint job.
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