Cornerstone Roofing is a GAF Certified Weather Stopper Roofing Contractor
We received our official GAF – Roofing Certified Installer certificate for 2014-2015: a factory certified status given to less than 6% of each 100 professional roofing contractors in the country.
Cornerstone Roofing has met the professional qualifications needed to become a GAF Certified Weather Stopper Roofing Contractor. We have pledged to insure that each customer receives the best and safest choice in roofing and we are authorized to offer the Weather Stopper System Plus Ltd. Warranty. Contact us at our office at 425-485-0111 or www.cornerstoneroofing.com for more details!