How To Repair Rotted Window Sills [DIRECT]

By the time he noticed the problem, it wasn’t a drip anymore. It was a soft, crumbly patch of wood near the outer edge—dark brown, spongy to the touch, and flecked with the fine orange dust of dry rot.

Shape the repair to shed water. The sill must slope away from the house, about 5 degrees. Any backward tilt is a suicide pact. Chapter Five: The Armor Hendricks sanded the whole sill smooth—old wood and new epoxy together—with 120-grit, then 220. Dust flew. The patch became indistinguishable from the original under a coat of primer. how to repair rotted window sills

The repair had cost him $47 in materials and two afternoons of his time. The window would outlast him now—and that, he thought, was the point. Not to cheat death or decay, but to meet it with skill, and to leave behind something still standing. By the time he noticed the problem, it

When you think you’ve removed enough rot, remove another half-inch into the healthy wood. Rot is like an iceberg; what you see is less than what’s there. Chapter Three: The Hardener and the Filler Hendricks vacuumed out the cavity and let it sit for a day with a small fan aimed at it. Wood must be bone-dry before repair. The sill must slope away from the house, about 5 degrees

The next morning, he brought out two small cans from his workshop: a wood hardener (thin, like watery varnish) and an epoxy wood filler (thick, like modeling clay).

If the rot extends into the jack studs or the rough sill below, stop. Call a carpenter. But if it’s just the visible sill and the first inch of substructure, you’re in business. Chapter Two: The Excavation He donned safety glasses—a lesson learned from a flying splinter in ’82—and went to work.