- Michigan
- Sherriff-Goslin Co.
- National Roofing & Sheet Metal Co. Inc.
- East Muskegon Roofing & Sheet Metal Co. Inc.
- Carlyle Roofing Co. Inc.
- Bob's Roofing Co. Inc.
- Arrow Roofing & Supply Inc.
- Allied Roofing & Siding Co.
- ALCO PRODUCTS LLC
- Bloom Roofing Systems Inc.
- Mid Michigan Roofing
- Michigan State University
- Brandle Roofing & Sheet Metal Co.
- NaturaShield LLC
- Newton Crane Roofing Inc.
- Detroit Cornice & Slate Co.
- Hoekstra Roofing Co.
- Renaissance Roofing Inc.
- Roofing Innovations
- Paramount Sheet Metal
- LiveRoof LLC
- Energy Shield Inc.
- Wm. Molnar Roofing Co. Inc.
- Roof One LLC
- Duro-Last Inc.
- Bruttell Roofing Inc.
- Bornor Restoration Inc.
- Nederveld Inc.
- Great Lakes Critical Power and Cooling
- Straightline Sheet Metal
- RoofingDrawings, LLC.
- Bright Roofing & Sheet Metal Inc.
- Tittle Brothers Construction
- Renner Bros. Construction Inc.
- Moore and Sons Roofing Inc.
- G. Freeland Roofing Systems Inc.
- Northwest Contracting Inc.
- West Michigan Roofing & Construction
- Wiss Janney Elstner Associates Inc.
- Jordan Roofing
- Lyster Exteriors
- CHEM LINK Inc.
- CEI Group LLC
- StructureTec Construction Services Group
- Morrow Roofing Inc.
- Doyle Inc. Roofing
- Allen Brothers Inc.
- Thermal-Tec/Michigan Inc.
- Louis T. Ollesheimer & Son Inc.
- DeWitt Products Co.
- Elastizell Corp. of America
- Dow Solar
- MacDermott Roofing Inc.
- Oakland Metal Sales Inc.
- Modern Roofing Inc.
- Tallon Construction
- M.W. Morss Roofing Inc.
- Lutz Roofing Co. Inc.
- Wimsatt Building Materials Corp.
- WeatherTech Consulting Group Inc.
- Butcher & Butcher Construction Co. Inc.
- Great Lakes Systems Inc.