(815) 388-3561 genexmchenry@gmail.com


Gen-Ex obtains all of their supplies from ABC Supply Company. Click Here for link.

Since its founding in 1982, ABC Supply Co. Inc. has revolutionized the roofing material distribution business. In the process, the company has grown to be a $4.6 billion enterprise serving the needs of the professional contractor with exterior building material stores across the United States.

Pro Sales Magazine 100 Top Players quote-

“The success that is chronicled in the history of ABC Supply is the result of an unwavering focus on a single, simple guiding principle – treat contractors with respect and give them the products and services they need to build their businesses.”

Gen-Ex finds this business attitude appealing to fulfilling their needs as contractors. As ABC Supply Inc. continues to meet our companies needs we will continue to use ABC’s superior roofing materials.

Gen-Ex uses the highest quality tools to make sure that the job is performed to our professional standards. From state of the art shingle removers to the shingles that are applied to your roof we spare no expense to ensure our customers receive the quality they deserve.

Contact Us

Gen Ex General Exterior Construction

McHenry, IL 60050

(815) 388-3561
Fax: (815) 648-1810

BBB Accredited

General Exterior Construction BBB Business Review


24/7 Emergency Service

Normal Business Hours

Monday   8:00 AM – 5:00 PM
Tuesday   8:00 AM – 5:00 PM
Wednesday   8:00 AM – 5:00 PM
Thursday   8:00 AM – 5:00 PM
Friday   8:00 AM – 5:00 PM
Saturday   Closed
Sunday   Closed