Exterior Vertical Expansion Joints

High-performance elastomeric sealants such as polyurethane or silicone are commonly recommended for their flexibility and durability. The WEATHERCAP® system is designed to work as an adjunct to these sealants. By reducing the joint opening size and shielding the sealant from stress and environmental exposure, it enhances the performance and longevity of any quality sealant used.

Building joints are broadly categorized as expansion (or isolation) joints and control (or contraction) joints. Expansion joints separate sections of a structure to allow independent movement, while control joints are created to manage where cracking occurs. Our WEATHERCAP® system is designed for expansion joints and is available in Type A for flat joints and Type B for 90-degree corner joints.

An expansion joint is a structural gap designed to absorb movement in building materials caused by thermal expansion and contraction, settlement, or seismic activity. Its purpose is to prevent stress, cracking, and structural damage to masonry, concrete, and other facade materials. Properly sealed expansion joints are critical for maintaining a building's weather-tight integrity over time.

WEATHERCAP® physically covers the sealant, shielding it from direct sunlight (UV degradation), rain, ice, and extreme temperatures. Its soft lead construction also absorbs much of the stress from building movement, reducing the strain on the sealant bead. This dual protection dramatically slows the aging process of the sealant, preventing premature failure and the need for frequent replacement.

Absolutely. While it's renowned for historic preservation, installing WEATHERCAP® in new construction is a proactive measure to ensure maximum joint durability from the start. It provides a robust, low-maintenance solution that protects the building's integrity and reduces long-term maintenance costs associated with sealant failure and water intrusion.

Yes, the WEATHERCAP® system can be painted to match any facade aesthetic. Its surface naturally oxidizes to a neutral grey that blends well with most masonry. However, for specific color matching, it readily accepts paint, providing architects and builders with complete design flexibility without compromising its protective function.