On Window Sills - Peeling Paint

What looked like cosmetic flaking turned out to be a symptom of deep moisture intrusion. Because the previous owner simply painted over old, loose paint, water seeped underneath and rotted the wood substrate. We ended up not just scraping paint, but having to splice in new wood sections on four different windows.

Skipping steps like cleaning, sanding, or using a bonding primer leaves dust and oils that prevent new paint from adhering correctly. peeling paint on window sills