Johns Manville has built its reputation with the specifying community and contractors alike through our highly experienced Technical Services Department and our skilled craftsmen. We are problem solvers through building movement management.

No matter how unusual your roofing challenge, Johns Manville can turn your rough sketches into custom-manufactured, high quality Expand-O-Flash^® expansion joint covers, intersections and transitions. And, when used in a total Johns Manville Roofing System, they can be included in one of the most comprehensive performance guarantees in the industry.

Seismic Joint Covers

We have expertly fabricated seismic closures on openings up to 24" (expansion joint over 54") to accommodate calculated multi-directional seismic movement without failure.

Radius Closures

Our designed solutions allow expansion along curved surfaces, such as arches, to accommodate movement at curved surfaces between building components, such as atriums and window walls.

Penetration Closures

Flexible closures are specifically designed to allow movement between pipes, ducts, tanks, bulk carrying equipment and building walls or roofs, especially where extreme temperatures cause thermal movement.

Specialty One-of-Kind

We help find solutions to building movement management through our Technical Service Department. Several solutions involve movement unrelated to roofing and/or buildings.