About Us

Mac Holcomb started a small company in Berkley in the mid 1930's. He provided roofing, carpentry, siding and gutter services to his residential customers. His son, Jerry Holcomb, the current president of Sentry Contractors, Inc., started working for his father when he was a teenager. The business was incorporated in 1966 and has been in the Farmington/Farmington Hills area for more than 50 years.  A second location has been added in White Lake Township and a 3rd location in Berkley. We have expanded our services to include almost everything including (but not limited to) roofing, flashing, gutters, siding, structure, kitchens, baths, masonry, additions, foundation, water proofing, all phases of renovation as well as all phases of construction. 

We look forward to working with you on your next project to provide you with the same excellent work at a fair price our company has always been known for.  As our family tradition enters 80 years, we would like to thank all our past and present customers for their confidence in us and we welcome all of our new customers to our business. 

Sentry Contractors, Inc. has grown yet keeps the business small enough to provide hands on one on one approach with our customers. We strive to be competitive while offering the same fine materials and workmanship our customers expect. Most often we offer single layer management in setting up and completing your job. 


Main & Billing/Accounting 

7250 Capri, White Lake, MI 48383

Main Phone: 248-887-8854

Fax: 248-887-8870

Farmington Hills

21429 St. Francis Rd, Farmington Hills, MI 48336

Phone: 248-476-4444


1860 Stanford, Berkley, MI 48072

Phone: 248-444-6192

License and Memberships

  License & Insurance: State Licensed (#2102010771) & Fully Insured Licensed in all cities   

Memberships Now and in the Past: Construction Association of Michigan Better Business Bureau - A+ Rating Farmington/Farmington Hills Chamber of Commerce Insurance Preferred Lists Recognized reliable professional by city Building Inspectors