Expansion Joint Catalogs: Types and Applications in the US

The primary benefits are enhanced durability and weather resistance for masonry joints. The soft lead flexes with building movement, prevents sealant failure (margin checking), resists corrosion and mold, and its surface oxidizes to a neutral grey that blends seamlessly with stone and masonry, making it ideal for restoration.

Type A is a flat cap configuration designed for joints where masonry units are in the same plane, such as copings or lintel tops. Type B is a 90-degree cove cap used for right-angle joints, like where a window sill meets a wall or at corner junctions. The choice depends entirely on the joint's geometry.

Yes, absolutely. While it is widely specified for historic preservation, the WEATHERCAP® system is also highly effective for protecting masonry joints in new construction, ensuring long-term durability and weatherproofing from the outset. Certain models, like the A-2, are specifically designated for new construction installations.

It acts as a physical shield, covering the sealant to protect it from UV degradation, weather, and physical stress. Its soft lead construction absorbs movement that would otherwise cause the sealant to tear or pull away from the masonry. This extends the sealant's effective lifespan and maintains a watertight seal.

All WEATHERCAP® products, including both Type A and Type B configurations, are supplied in standard 6-foot lengths. This allows for efficient transportation and enables contractors to cut and fit the caps to the precise dimensions required for each joint on the job site. Most orders ship within 48 hours.

Yes, it is exceptionally well-suited for historic restoration and is a preferred choice for preservation specialists. Its use is specified in the U.S. GSA's Historic Preservation Technical Procedures. The system's ability to blend in visually and provide long-lasting protection makes it ideal for preserving landmark structures.