ThyCurb, Addison, Ill., offers Retro-Curb insulated curbs for metal buildings. The curbs allow for unrestricted positioning on standing seam roof systems and are custom- designed to accommodate any roof slope for rooftop equipment. The curb has an oversized, flat, prepunched base flange that can be cut out to allow perfect alignment with the seams on the roof. Standard construction includes 18-gauge AZ-55 Galvalume with mitered and fully welded corners, formed-in water diverter, and loose cell caps to match most standing seam configurations. All of this allows for a long-lasting watertight installation.