Replace any defective corrugated panels or skylights.
Wire brush and remove any flaking rust.
Thoroughly pressure wash roof, especially oxidized areas, with a minimum of 3,000 PSI.
Apply Clear BASE/Black Acrylic PRIMER @ 1 gal/100 ft² to entire roof surface including penetrations. Allow 4-24 hours cure time.
3-COURSE PENETRATION DETAIL (see Metacrylics® Penetration Detail instructions sheet which includes all penetrations, drains, scuppers, flashings, ductworks, & parapets).
Most issues are the endlaps and the standing seam when not crimped tight. 3-Course all standing seam crimps with Metacrylics® Acrylic GEL and 4 inch Fabric. For any endlaps that may be exposed or leaking, 3-Course with GEL & 6 inch Fabric.
Apply two applications @ 2 gal/SQ of Metacrylics® Acrylic WHITE each application; also, apply to all parapet walls, flashings, and ductworks. Allow 24-48 hours cure time.