GSA Specified for Historic Preservation certified

GSA Specified for Historic Preservation

U.S. Patented System certified

U.S. Patented System

Custom Metal Window Flashings

Explore custom metal window flashings from Weathercap, a patented soft lead system designed to protect sealant in masonry joints. Our solutions prevent moisture penetration and accommodate building movement, making them ideal for new construction and historic preservation. Trusted on national landmarks, our system ensures long-lasting, weather-resistant seals.

WEATHERCAP B-6 Type B 90° Cove Cap
WEATHERCAP A-4 Type A Flat Joint Cap
WEATHERCAP A-8 Type A Flat Joint Cap
WEATHERCAP B-8 Type B 90° Cove Cap
WEATHERCAP A-6 Type A Flat Joint Cap
WEATHERCAP Window and Door Frame Joint Protection
WEATHERCAP Window Sill Joint Protection
WEATHERCAP B-4 Type B 90° Cove Cap
WEATHERCAP A-2 Type A Flat Joint Cap
WEATHERCAP B-3 Type B 90° Cove Cap
WEATHERCAP B-2 Type B 90° Cove Cap
WEATHERCAP Glass Block Perimeter Joint Protection
WEATHERCAP Type B 90° Cove Cap
WEATHERCAP Window and Door Lintel Joint Protection
WEATHERCAP A-3 Type A Flat Joint Cap
WEATHERCAP Type A Flat Joint Cap
WEATHERCAP Custom and Large-Size Masonry Joint Caps
WEATHERCAP Entrance Step Joint Protection
WEATHERCAP Portico, Bracket and Pilaster Joint Protection
WEATHERCAP Building Movement and Joint-Checking Protection
WEATHERCAP Historic Masonry Preservation Joint Protection
WEATHERCAP Balustrade Joint Protection
WEATHERCAP Joint Protective System (Lead Stone Flashing / Tee Caps)
WEATHERCAP Lead Arrowhead Masonry Joint Caps
WEATHERCAP Corner and Fillet Joint Protection
WEATHERCAP Masonry Moisture Penetration Protection
WEATHERCAP Horizontal and Vertical Masonry Joint Protection
WEATHERCAP New Construction Masonry Joint Protection
WEATHERCAP Cornice and Belt Course Joint Protection
WEATHERCAP Masonry Sealant Protection System

Our Range of Products

WEATHERCAP B-6 Type B 90° Cove Cap

WEATHERCAP B-6 Type B 90° Cove Cap

  • Soft lead flexes with building movement
  • Protects sealant, extends joint lifespan
  • Stock 6-ft lengths, ships within 48 hours
WEATHERCAP A-4 Type A Flat Joint Cap

WEATHERCAP A-4 Type A Flat Joint Cap

  • Type A flat cap for same-plane joints
  • Oxidizes to neutral grey, paintable finish
  • Resists corrosion and mold on sealant
WEATHERCAP A-8 Type A Flat Joint Cap

WEATHERCAP A-8 Type A Flat Joint Cap

  • Largest flat cap for joints up to 1 1/2 in
  • 2 in outer coverage for maximum protection
  • Ideal for large coping and lintel joints
WEATHERCAP B-8 Type B 90° Cove Cap

WEATHERCAP B-8 Type B 90° Cove Cap

  • Heavy-duty cove cap for 1 1/4 in joints
  • Perpendicular anchorage for large joints
  • Wide 1 3/4 in outer coverage
WEATHERCAP A-6 Type A Flat Joint Cap

WEATHERCAP A-6 Type A Flat Joint Cap

  • Flat cap covers joints up to 1 1/4 in
  • Wide 1 1/2 in outer coverage protection
  • Ideal for copings and cornice joints
WEATHERCAP Window and Door Frame Joint Protection

WEATHERCAP Window and Door Frame Joint Protection

  • Type B cove cap for frame perimeter joints
  • Protects sealant on window & door frames
  • Suited for ornamental stone frame details

Showing 1 to 6 of 30 results

Frequently Asked Questions

What exactly is a WEATHERCAP® metal flashing?

It's a patented soft lead cap system designed to protect sealant in masonry joints, including around windows. It acts as an adjunct to caulk, absorbing movement and preventing moisture penetration to extend the life of the joint seal, making it a superior flashing solution.

What materials are your window flashings made from?

Can these flashings be used for historic restoration projects?

Do you offer custom sizes and shapes for window flashings?

How does this system protect against water leaks?

Can the flashings be painted to match building exteriors?

What is the typical lead time for an order?

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Industries We Serve

Historic Preservation

Historic Preservation

Protecting the integrity of landmark structures with joint solutions that respect historical aesthetics.

Government & Institutional

Government & Institutional

Ensuring long-term weatherproofing for public buildings, universities, and monuments with durable joint protection.

Commercial Architecture

Commercial Architecture

Providing durable, low-maintenance joint protection for new commercial masonry construction and window installations.

Architectural Restoration

Architectural Restoration

Specialized solutions for restoring and protecting masonry on balustrades, cornices, parapets, and window surrounds.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Why Architects & Restoration Specialists Choose Weathercap

Proven on National Landmarks

Our WEATHERCAP® system is trusted to protect America's most iconic buildings, including the Washington Monument, U.S. Supreme Court, and Smithsonian Institution.

Patented Joint Protection

Leverage our unique, patented (U.S. Patent 6991400) soft lead technology that accommodates building movement to create a permanent, elastic seal.

GSA-Specified Solution

Specified in U.S. GSA Historic Preservation Technical Procedures, our system is the standard for durable, weather-resistant masonry joint protection.

Get a Quote for Your Custom Flashing Project

Submit your project details, and our team will provide technical guidance, sizing information, and a detailed quote for your specific application.

Contact Us Today

For immediate assistance, feel free to give us a direct call at (985) 649-4000.