Guarantee Roofing & Sheet Metal of South Dakota, Inc. was established in Sioux Falls in 1981 and has been involved with insta ... lling more than 100 million square feet of commercial roofing systems across the Midwest – that’s an expanse equivalent to more than 2,000 football fields. Across all business categories, we’ve earned the trust of our clients because experience matters when you’re protecting your business, your customers and your investments with a long-lasting roofing system that you can rely on. -Schools/Universities -Hospitals -Churches -Factories -Retail – Stores -Other Institutions read more