Hinged Expansion Joints: Understanding Their Function and Types

WEATHERCAP® covers the sealant, shielding it from UV radiation, weather, and physical damage. This protection prolongs the sealant's life and prevents 'margin checking' or failure. The cap's design also reduces the effective opening size of the joint, minimizing stress on the sealant during movement.

Yes, our system is ideal for both new construction and historic restoration. It provides long-term joint protection from the outset, preventing costly moisture-related issues down the line. Our A-2 Type A cap is specifically designated for new construction installations, ensuring robust performance from day one.

Type A caps have a flat profile and are designed for joints where masonry units are in the same plane, such as cross joints on a coping or balustrade. Type B caps have a 90-degree cove profile for right-angle joints, such as where a cornice meets a wall or a window sill joins masonry.

Absolutely. It is a premier choice for historic preservation, trusted on landmarks like the Washington Monument and Smithsonian Institution. Its effectiveness is recognized by its inclusion in the U.S. General Services Administration (GSA) Historic Preservation Technical Procedures, making it a specified solution for sensitive restoration projects.

Our caps are made from a soft lead alloy. This material is chosen for its unique properties: it remains flexible, has a low elastic modulus to accommodate movement without stress, and oxidizes to a neutral grey that blends seamlessly with stone and masonry. It is also highly resistant to corrosion and mold.

All WEATHERCAP® products are supplied in standard 6-foot lengths, which can be easily cut and formed on-site to fit specific joint requirements. We maintain a full manufacturing and supply chain, and materials are typically shipped within 48 hours of order placement to locations across the United States.