GSA Specified certified

GSA Specified

U.S. Patented System certified

U.S. Patented System

Lowes Expansion Joint Options for Concrete Projects

Explore durable expansion joint options for concrete and masonry projects. These patented, soft lead caps are designed as an adjunct to sealant, providing a long-lasting, weather-resistant seal. They protect against moisture penetration caused by building movement, prolonging sealant life and ensuring structural integrity in both new construction and historic restoration.

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

Our Range of Products

WEATHERCAP Entrance Step Joint Protection

WEATHERCAP Entrance Step Joint Protection

  • Type B cap for entrance step joints
  • Protects tread, riser & stringer joints
  • Ideal for historic entrance restoration
WEATHERCAP A-8 Type A Flat Joint Cap

WEATHERCAP A-8 Type A Flat Joint Cap

  • Largest A-series flat cap size
  • Joint size under 1 1/2 in (38.1mm)
  • Outer coverage approx 2 in wide
WEATHERCAP B-8 Type B 90° Cove Cap

WEATHERCAP B-8 Type B 90° Cove Cap

  • Largest B-series, perpendicular anchorage
  • Joint size under 1 1/4 in (31.75mm)
  • Heavy-duty 2.5 lb/ft construction
WEATHERCAP Portico, Bracket and Pilaster Joint Protection

WEATHERCAP Portico, Bracket and Pilaster Joint Protection

  • Combined A & B for porticos & pilasters
  • Protects projecting architectural elements
  • Flexible lead accommodates movement
WEATHERCAP A-6 Type A Flat Joint Cap

WEATHERCAP A-6 Type A Flat Joint Cap

  • Joint size under 1 1/4 in (31.75mm)
  • Outer coverage approx 1 1/2 in
  • Approx 0.83 lb/ft flat cap
WEATHERCAP Balustrade Joint Protection

WEATHERCAP Balustrade Joint Protection

  • Type A cap for balustrade joints
  • Field-cuttable 6-foot lengths
  • Suited for historic balustrade restoration

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Frequently Asked Questions

What are expansion joint caps used for in concrete projects?

While primarily for masonry, these caps are vital for protecting sealant in joints where concrete meets other materials, like stone facades or window frames. They prevent water intrusion and damage from building movement, extending the life of the sealant and the structure.

How do these lead caps work?

What's the difference between Type A and Type B caps?

Are these products suitable for new construction?

Can WEATHERCAP products be painted?

How are the joint caps supplied?

What kind of technical support is available?

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 irreplaceable landmarks from moisture damage by sealing vulnerable masonry joints.

Government & Institutional

Government & Institutional

Specified for federal buildings, state capitols, and universities to ensure long-term durability.

Architectural & Commercial

Architectural & Commercial

Ensuring weather-tight seals on new construction for copings, parapets, and window perimeters.

Residential Masonry

Residential Masonry

Protecting joints on high-end residential projects, including entrance steps, porticos, and sills.

Didn't find what you're looking for?

Talk to our experts for custom solutions and tailored guidance.

Why Restoration Architects Choose Weathercap

Patented Protection Technology

Our unique soft lead joint cap system is protected by U.S. Patent 6991400. It's engineered to flex with building movement, protecting sealants and preventing leaks.

Proven on National Landmarks

Trusted for the most demanding historic preservation projects, including the Washington Monument, U.S. Supreme Court, and Smithsonian Institution.

GSA Specified for Preservation

Officially specified in the U.S. General Services Administration's Historic Preservation Technical Procedures, ensuring compliance and quality.

Get Technical Specs & Sizing Guidance for Your Project

Have questions about the right joint cap for your application? Contact our team for technical support, CAD drawings, and ordering information.

Contact Us Today

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