Stone Sill Repairs

How Sandstone Window Sills Get Damaged

Sandstone window sills are durable but naturally porous, which means they can become damaged over time, especially when exposed to the elements.

Common Causes of Damage

1. Weather Exposure
   Rain, frost, and temperature changes can cause erosion, cracking, and surface wear.

2. Water Absorption
   Sandstone absorbs moisture, which can lead to staining, weakening, and frost damage.

3. Freeze–Thaw Damage
   Water trapped in the stone can freeze and expand, causing cracks and flaking.

4. Impact Damage
   Knocks from tools, window frames, or ladders can chip or crack the sill.

5. Pollution and Dirt
   Air pollution and dirt can stain the stone and break down the surface over time.

6. Poor Maintenance
   Lack of cleaning or sealing allows moisture and dirt to penetrate the stone.

7. Poor Installation
   Incorrect fitting or lack of proper support can cause cracking or movement.

Conclusion
Regular cleaning, proper sealing, and avoiding impact can help extend the life of sandstone window sills.