
WEATHERCAP Window and Door Frame Joint Protection
- Protects sealant around window and door frames
- Flexible lead adapts to frame movement
- Ideal for ornamental & historic restoration
GSA Specified Product
U.S. Patent Holder
Registered U.S. Trademark
Explore Weathercap's patented lead masonry joint caps, a protective system for stone and masonry construction. Our soft lead strips are designed as an adjunct to caulk/sealant, prolonging sealant life, preventing moisture penetration, and ensuring the integrity of joints in cornices, window frames, and parapets. Trusted for historic preservation.







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Ridge flashings are components used to seal the peak of a roof. Our product, Weathercap®, serves a similar protective function but for masonry joints. It is a patented lead cap that covers sealant in areas like cornices, parapets, and window sills to create a long-lasting, weather-resistant seal and prevent moisture damage.
Talk to our experts for custom solutions and tailored guidance.

Protecting and preserving the integrity of masonry joints in landmark buildings and historic structures.

Ensuring long-term weatherproofing for masonry joints in new commercial buildings, including copings and cornices.

Specified for use on federal buildings, state capitols, and universities to ensure maximum durability and longevity.
Talk to our experts for custom solutions and tailored guidance.
Our U.S. Patented soft lead system offers a unique solution that absorbs stress and protects sealant, significantly extending the life of masonry joints.
Trusted for projects at the Washington Monument, U.S. Supreme Court, and Smithsonian, our system is the proven choice for preserving iconic structures.
Weathercap is specified in the GSA's Historic Preservation Technical Procedures, making it a trusted standard for government and institutional projects.
Contact our team for technical information, CAD drawings, sample specifications, and ordering support. We typically ship materials within 48 hours of order placement.
For immediate assistance, feel free to give us a direct call at (985) 649-4000.
For immediate assistance, feel free to give us a direct call at (985) 649-4000.