How to Repair Mortar Joints

3 Signs Your Mortar Needs Repointing 🧱 Whether historic or modern, masonry buildings rely on solid mortar joints to stay stable and weather-resistant. But time, moisture, and poor maintenance can lead to deterioration — and when that happens, acting quickly is crucial. Here are three signs it’s time to repoint: 1️⃣ Crumbling or loose joints – the mortar loses cohesion and begins to fall out. 2️⃣ Visible cracks or gaps – open joints allow water infiltration, leading to deeper structural damage.