Johns Manville Expansion Joint Covers for Roofing Solutions

Type A is a flat cap used for joints where masonry units are in the same plane, like on copings or lintel tops. Type B is a 90° cove cap used for right-angle joints, such as where a water table meets a wall or around window frames and sills.

Yes, it is suitable for both new construction and historic restoration projects. The system is designed to provide long-term protection for any masonry joint, ensuring durability from the start. The A-2 model is specifically for new construction applications.

The soft lead construction has a low elastic modulus, allowing it to remain flexible and 'creep' into new configurations as the building settles or moves. This unique property prevents the sealant from tearing and maintains a continuous weatherproof seal over time.

Absolutely. While the lead naturally oxidizes to a neutral grey that blends well with most masonry, the caps can be painted to match any specific architectural color requirements. This offers excellent design flexibility for both restoration and new construction projects.

We offer a range of stock sizes in both Type A and Type B configurations to fit joints from under 3/8 inch up to 1 1/2 inches. For unique project specifications, custom and larger sizes can also be manufactured upon request to suit non-standard conditions.

For qualified masonry contractors, installation is a straightforward process where the cap is embedded into a sealant-filled joint. To ensure optimal performance, we provide comprehensive technical information, sample specifications, and CAD drawings to support a proper installation.