Based on the company needs and seasons, Granite City Roofing employs between 40-55 skilled craftsmen who can install or repair any type of roof style designed to uphold under the snow and ice of a brutal Minnesota winter and the heat and rain of spring, summer and fall. Granite City Roofing is one of the only companies in Central Minnesota capable of installing high-quality architectural sheet metal roofing – roofing which requires special equipment and techniques to install.