We recently repaired this weathered sandstone window sill: ❌ Deep cracks, spalling (flaking surface), and water ingress. ✅ The fix: 1️⃣ Raked out old, failed mortar. 2️⃣ Applied a breathable stone repair mortar. 3️⃣ Reshaped the profile to match the original. 4️⃣ Finished with a water-repellent (but breathable) sealer.
Left side: 100+ years of rain, frost, and neglect. Right side: Repointed, reprofiled, and revived. repair sandstone window sill
Repairing original stone always beats replacing with new. It keeps the soul of the building intact. We recently repaired this weathered sandstone window sill: