Buy Natural Stone Wall Caps

Capping a wall means installing the top course of stone or masonry, known as coping or capstones. This cap serves to protect the wall from weather by shedding water away from the structure. Our WEATHERCAP® system is designed to protect the most vulnerable part of the cap — the sealant-filled joints between the stones.

The stone on top of a wall is called a coping, capstone, or capping stone. Its primary purpose is to protect the wall beneath from water ingress. WEATHERCAP® is not the stone itself, but a patented lead cap designed to protect the vulnerable sealant joints between these stones from failure due to movement and weather exposure.

Soft lead is ideal due to its flexibility and low elastic modulus, allowing it to 'creep' and adapt to building movement without failing. It's highly resistant to corrosion and mold, can be painted, and oxidizes to a neutral grey that blends seamlessly with masonry, ensuring durable, long-term protection for sealant joints.

Yes, WEATHERCAP® is suitable for both historic restoration and new construction projects. It provides a durable, long-lasting joint protection solution that extends the life of sealant and prevents moisture issues from the start. Our A-2 Type A cap is specifically designated for new construction installations to ensure maximum longevity.

Type A is a flat cap designed for joints between masonry units that are on the same plane, such as the top joints of a coping or a flat belt course. Type B is a 90-degree 'cove' cap used for right-angle joints, like where a horizontal window sill meets a vertical wall or a coping stone meets a parapet wall.

WEATHERCAP® is supplied in standard 6-foot lengths, allowing for easy handling and cutting to size on the job site. We maintain a full manufacturing and supply chain, and materials are typically shipped within 48 hours of an order being placed, ensuring your project stays on schedule. Custom sizes can also be requested.