BUILDING DIVISION - ROOF SYSTEMS

Low Profile Metal Over Metal Re-Roof Application

New Metal Roof Over Existing Metal Roof Application

The Low Profile Retrofit Metal over Metal System allows for the efficient installation of an MR-24^® Standing Seam Roof System over an existing through-fastened rib type roof with an existing minimum roof slope of 1/4" /12" and major corrugation heights of 1-1/2" or less.

The MR-24^® roof panels used on this system are permanently seamed together with a full 360° "Pittsburgh" double lock seam to assure weather-tightness and long-term performance with minimum maintenance expense.

The retrofit MR-24^® roof clips, installed in predrilled holes, securely attach the roof panels to the existing supporting structurals with stainless steel tabs rolled formed into the panel seam. Stainless steel tabs are more than 50% stronger than other galvanized standing seam tabs. The cup design will accommodate expansion and contraction forces in buildings up to 500 feet wide.

Panel support blocks rest on the flat of the existing panel and provide a bearing surface to transfer loads through the flat of the MR-24^® roof panel to the existing structurals.

The Low Profile Retrofit Metal over Metal System includes a complete line of accessories (seamed-in curbs, stainless steel gutter, etc.) designed to fit perfectly with the MR-24^® roof system.

The MR-24^® roof system has a U.L. Class 90 wind uplift rating and U.S. Army Corps of Engineers Guide Specification 07416 certification.