Installation of roof curbs on metal buildings is made easier with the Retro-Curb, says the manufacturer. The insulated curbs allow for unrestricted positioning on standing seam roof systems, and are custom designed to accommodate any roof slope, the company says. The curb has an oversized, flat, prepunched base flange that can be cut out to allow alignment with the seams on the roof. Standard construction is 18 ga AZ-55 Galvalume®.

Thybar Corp., 913 South Kay Ave., Addison, IL 60101; 800-666-2872; 630-543-5300; 630-543-5309 (fax); (e-mail); (Web site).