Bilco VersaMount Hatch Covers allow you to replace a damaged roof hatch without re-roofing. Simply remove the cover from the damaged hatch and place the Versamount hatch on top of the existing curb. The low-profile VersaMount curb features a built-in flange and apron and innovative anchor clip system to ensure a fast, secure, and weathertight installation. Available in a number of standard sizes.