Welcome to Guarantee Roofing & Siding Co. serving Sioux City, Iowa and surrounding areas. Our experienced team of skilled professionals provides expert roofing, re-roofing, and roof repair for homes, businesses, industrial projects and farms. Guarantee Roofing & Siding Co. uses only the best products available and we are fully Bonded and Insured.  We pride ourselves on our prompt and courteous service, as we have since 1926.  Our contractors are GAF Certified so you can trust that you are in good hands We are available 24 hours a day.  Contact us today and speak with one of our roofing experts at (712) 277-3981 for your FREE estimate!