A Leading Provider of Exterior Commercial, Residential and Repair & Remodel Building Products. From windows and siding to shingles and shutters, the Residential Solutions division of Cornerstone Building Brands offers a comprehensive range of best-in-class products and solutions for the residential new construction and repair and remodel markets. Our Norandex private brand labeled window program is offered through ABC Supply for HUD grantees and their contractors, in support of the Healthy Homes Initiative and National Home Performance.