Robertson Roofing and Siding Inc. is closing in on almost 40 years in the roofing business. Most roofing companies work out of their house and typically go out of business in just a few short years after they open. When they go out of business so does your workmanship warranty with that company. Your workmanship warranty is only as good as the company you hire. Robertson Roofing already has second generation family working in the business.