BL Dalsin was founded in 1944 and has been a major contractor in the Twin Cities and surrounding areas for decades. Our manag ... ement team averages over 27 years of commercial roofing experience. Description BL Dalsin Roofing strength is solid and our bonding capacity allows us to bid any size project. We have relocated to a modern facility where we fabricate architectural sheet metal components associated with our roofing projects and our full time mechanic keeps our equipment safe and reliable. We take jobsite safety very seriously and this can be verified by our safety and OSHA records. Please contact us if you have any questions regarding our qualifications or abilities pertaining to any project now or the future. read more