What are your hours of operation? Monday – Friday: 8 a.m. – 5 p.m. Saturday and Sunday by appointment. Available 24/7 for emergencies. Call (210) 867-2911 for emergencies. By Kresta Roofing|2020-09-08T20:14:40+00:00February 11th, 2019|Categories: About Kresta| Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkEmail About the Author: Kresta Roofing Kresta Roofing is a roofing contractor near San Antonio, Texas providing residential and commercial roofing services as a top rated with 40 years of experience roofing contractor.