A1 Home Improvement provides the most comprehensive and trusted roofing services in Connecticut.roof installation to storm insurance claims for roof damage, windows to siding, we have your needs covered. A1 Home Improvement LLC is roofing contractor in the Berlin, CT area.We have 33 years experience in window ,roofing and sliding many postive review on angie's list. Call today for roof installation, roof repair, and commercial roofing .