Expansion Joint Solutions for Seismic and Fire Protection

The soft lead cap covers the sealant, shielding it from UV radiation and environmental stress. Its low elastic modulus allows it to flex and 'creep' into new configurations as the building moves, absorbing stress that would otherwise cause sealant to fail or check. This maintains a continuous, weather-resistant seal.

Type A is a flat-cap configuration designed for joints where masonry units are set in approximately the same plane, such as the top of a coping. Type B is a 90-degree cove-cap configuration used for right-angle joints, such as where a window sill meets a vertical wall or at a corner.

Yes, WEATHERCAP® is suitable for both new construction and historic restoration projects. It provides durable, long-term joint protection for any exterior masonry application, including parapets, copings, and architectural stone details. Our A-2 Type A cap is specifically designated for new-construction installation.

Absolutely. WEATHERCAP® is ideal for historic restoration and is specified in the U.S. GSA's Historic Preservation Technical Procedures. Its ability to accommodate movement without stressing fragile, older masonry makes it a preferred choice for preserving the integrity of landmark structures across the United States.

Yes, WEATHERCAP® can be painted to match the surrounding masonry or architectural details for aesthetic purposes. If left unpainted, the soft lead surface naturally oxidizes to a neutral grey that blends seamlessly with most stone and masonry, providing a discreet, protective finish that doesn't detract from the building's appearance.

We offer a range of stock sizes in both Type A and Type B configurations to fit joints from under 3/8 inch up to 1 1/2 inches. All stock products are supplied in 6-foot lengths for field cutting. For non-standard joint conditions, we can also provide custom and large-size caps upon request to meet specific project requirements.