How To Install A Roof Curb On A Metal Roof

Specify roof curbs in section 07720.

How to install a roof curb on a metal roof.

Standing seam roof curbs install under the roof panel on the up slope and over the roof panel on the down slope which results in a shingled watershed condition. Full service curb manufacturers offer this type of diversification and coordination with a given roof system by offering curbs which are canted non canted raised canted self flashing or designed and manufactured to match the exact profile of a pre engineered metal roof system. Use your neoprene washer head screws to secure the metal to the sheathing. Space the screws about 12 in 30 cm apart down the entire piece of metal.

Install the roofing screws vertically along each rib in the panel. A galvalume coated roof doesn t mean that a galvanized steel roof curb is the best thing to use in fact galvanized roof curbs are known to rust corrode and leak particularly along weld joints as soon as a year after installation. A good penetration requires more than supplying just any roof curb. Curbs as a component are widely available but york roof mounted solution units incorporate only the best top of the line high quality roof curbs.

Roof curbs may include a custom finish that matches the roof color. There are many cases where conventional. Roof curbs for standing seam metal roofs pick the proper material. Contractors should not be asked to supply or install roof curbs for roo fi ng systems.

Economical flat flange models are also available. Include a footnote in the mechanical and skylight sections that reads all roof curbs are specified in 07720 curb installation should be a part of the roof deck not on top of insulation or roofing materials. Second the curb should be available in a variety of heights. Take your first sheet of metal and place it on the roof so that it overhangs the edge at least 3 4 in 1 9 cm.

Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof line. Take care the first piece is aligned precisely perpendicular square to the edge.