Bison Construction Services

Certifications & Awards

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  Certified

  Only 7% of roofers in North America are invited to become GAF Certified™ Contractors. It can’t be bought. It can only be earned.*

  Get peace of mind with a Certified™ Contractor

  At GAF, we evaluate thousands of roofers in the country and make sure they're insured and have state licenses (in states that require them) so they can offer our best warranties.