Metro Detroit's Leading Wholesale Supplier of Penetration Covers

We fabricate, supply and install custom metal components for commercial, industrial and residential projects. 

JML Architectural Sheet Metal is a leading fabricator of penetration covers in the Detroit Michigan area. We carry a large inventory of architectural sheet metal products and can handle almost any size projects. We supply and fabricate penetration covers in our own facility, allowing us to customize roofing products, gutters, and other architectural metal elements to fit your unique project.