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Made in Michigan for the world we live in

CBS Solar works towards establishing solar energy as a primary source of electricity for all commercial and residential properties throughout the US. We take great pride in our work and will make sure each customer receives the finest service, care and products. Our goal is to provide a highly efficient product with exceptional customer service.

Solar Energy

CBS Solar. is committed to providing superior products for residential, commercial and community solar project. Strengthening that commitment in 2013 CBS Solar has become UL 1703 approved to assemble and test highly efficient solar panels produced in Michigan.


Contractors Building Supply, Inc. believes in providing quality windows built in America and are Energy Star qualified. In 2013 Thermolock Mfg. was acquired by Vinylmax, LLC. of Hamliton, OH and Vinylmax like CBSI believes in high quality energy efficient windows Produced in the USA.

About Us

Contractors Building Supply, Inc. has been a family owned and operated business for over 40 years. We have always taken pride, in providing, quality products, and services. See a little bit about who we are.