Cornerstone Forming most valuable asset is its’ people. We are comprised of the best industry professionals who are united in their efforts to fulfill the company’s vision of maintaining a high level of integrity and excellence while achieving customer satisfaction. We believe our business’ success is a direct result of the people working hard for our company. Cornerstone teammates take pride in their work and achievements. From the carpenter working on the jobsite to the estimator in the office and every teammate in between, Cornerstone will work in unity to provide customer ease through quality workmanship and exceptional service.