ABOUT SUNDOWN EXTERIORS: NATIONALLY RECOGNIZED ROOFERS IN BLOOMINGTON IL Sundown Exteriors is one of the top roofing contractors and general contractors in Bloomington. We are a GAF Master Elite Contractor, an achievement attained by less than 2% of professional roofing contractors in the country. Specially enhanced GAF warranties can only be installed by a factory-certified organization. This means that you, as our customer, can receive much greater peace of mind because these enhanced warranties more than double the coverage of traditional roofing warranties offered by our competitors.