First, he cut away the old caulk and glazing putty from the bottom of the lower sash. Then, with a oscillating multi-tool (though a sharp chisel would do), he cut a clean straight line about an inch past the visible rot on each side. The cut was vertical, maybe half an inch deep into good wood.
And so he told himself—and now, he’ll tell you—how to repair rotted window sills without losing the soul of the house. Hendricks took a screwdriver—not a fancy tool, just a flathead with a worn handle—and probed the sill. Good wood sings back a hard, bright resistance. Rot gives way like a rotten apple. He marked the soft zone with a pencil: about eight inches long, two inches deep, reaching into the corner where the sill met the side casing. how to repair rotted window sills
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. First, he cut away the old caulk and