Tesla, 100 Pigeon Rd, Bad Axe, MI 48413, US

Established in 1978, Duro-Last Roofing manufactures prefabricated roofing systems for use in a variety of residential and commercial buildings, including factories, schools, churches, hotels and restaurants. Each of the company s roofing products uses its exclusive proprietary thermoplastic formulation, which combines resins, plasticizers, stabilizers, biocides, flame-retardants and UV absorbents. Its products are also designed to be leak-proof, chemical-resistant, wind-resistant and maintenance-free. More than 1 billion square feet of Duro-Last Roofing products have been installed in residential, commercial and industrial buildings throughout North America. It is headquartered in Saginaw, Mich., and operates additional facilities in Grants Pass, Ore., Jackson, Miss., and Sigourney, Iowa.