1️⃣ – Use a 5-in-1 tool or flathead screwdriver to dig out loose, decayed wood. 2️⃣ Treat the area – Apply wood hardener to stop remaining rot and prep for filler. 3️⃣ Fill deep holes – Use two-part epoxy wood filler (not standard putty). Overfill slightly. 4️⃣ Shape & sand – Once cured (24h), sand flush with the original profile. 5️⃣ Prime & paint – Use exterior primer + paint to seal against future moisture. 6️⃣ Add drip edge – Caulk the underside joint to shed water away.
⏱️ ~2 hours + drying 💰 Cost: ~$30–$50 (vs $500+ for replacement) how to repair a rotted window sill
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