MR-24 Monolithic Roof System


The MR-24® roof system is specifically designed to accommodate roof movement. The system is attached to the building’s structure with a special clip and tab assembly formed into the double-lock seam. Because the tab can move within the clip, the entire roof can expand and contract freely without sacrificing structural integrity. Butler’s exclusive Pittsburgh double-lock standing seam assures you of consistent weathertight performance.


Roof panels are permanently seamed together with a 180 degree field formed seam completing a full 360 degree “Pittsburgh” double-lock seam to keep moisture out and assure structural integrity.


Roof clips securely attach the roof panels to the supporting structurals by stainless
steel tabs which are roll formed into the panel seam.

Every part of the exclusive MR-24 roof system uses only the highest quality materials to assure a weather-tight standing seam roof that acts like a single, monolithic steel membrane.

Independent surveys show that the MR-24 roof system is the most specified standing seam roof on the market, with over 1 billion square feet installed since its introduction in 1969.