How To Repair Rotted Window Sills ((new)) -

He brushed on an exterior oil-based primer, then two topcoats of satin latex. But the real secret came last: he did not caulk the bottom edge of the sill where it met the brick. Many people make that mistake. Caulk there traps water. Instead, he left a ⅛-inch gap—a “weep path”—so any future moisture could escape.

Then he mixed the two-part epoxy filler. It smelled like a chemistry lab and felt like warm taffy. He pressed it into the cavity with a putty knife, overfilling slightly, mounding it above the original surface. He let it cure for a full 24 hours. Patience, he reminded himself. Rot took years. Epoxy takes a day. Now came the art. The cured epoxy was harder than the original oak. Hendricks pulled out a block plane and a rasp. He shaved the epoxy down to the level of the old sill, then used the rasp to carve the subtle front slope—the “drip edge”—that shed water away from the glass. how to repair rotted window sills

Finally, he replaced the broken glazing bead that had started the whole tragedy, bedding it in fresh glazing compound. Three weeks later, a nor’easter hammered the coast. Hendricks sat in his armchair, drinking tea, watching the rain sluice down the glass and dance off the new sill. He walked over, ran a finger along the underside. Bone dry. He brushed on an exterior oil-based primer, then

Old man Hendricks had lived in the gable-ended cottage for forty-seven years. He’d painted the clapboards, rehung the shutters, and swept the chimney every autumn. But there was one thing he’d ignored: the slow, silent drip from a cracked glazing bead on the east bedroom window. Every rainstorm, a teaspoon of water would sneak past the paint, lodge itself in the end grain of the sill, and begin its quiet work. Caulk there traps water

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.