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
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.