Repair Sandstone — Window Sill

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.

A structurally sound, great-looking sill for a fraction of the cost of replacement. Sandstone can almost always be saved if caught in time. repair sandstone window sill

Differential weathering had caused deep surface loss (up to 20mm) and hairline fractures threatening the sill's integrity. We recently repaired this weathered sandstone window sill: