 410-655-3700. Wallace Roofing in business for over 92 years. They're your full-service roofing company specializing in steep and flat roofs, all types of metal roofs, gutters, downspouts, skylights. They're residential and commercial roofs and do not use subs. Getting a roof repaired or replaced is something most of us dread. And when that happens, it's important to get not just the finest quality materials available, but a fair and reasonable price on them as well.