How To Install A Roof Curb On A Metal Roof

There are many cases where conventional.

How to install a roof curb on a metal roof.

Contractors should not be asked to supply or install roof curbs for roo fi ng systems. 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. A good penetration requires more than supplying just any roof curb. 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.

Second the curb should be available in a variety of heights. 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. Space the screws about 12 in 30 cm apart down the entire piece of metal. Specify roof curbs in section 07720.

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. 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. 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. Use your neoprene washer head screws to secure the metal to the sheathing.

Install the roofing screws vertically along each rib in the panel. Repair of a leaky metal roof curb utilizing immerseal hd from sealex inc. Economical flat flange models are also available. In addition a 20 year warranty comes standard on all aluminum curbs.

Take care the first piece is aligned precisely perpendicular square to the edge. Be sure the larger edge is laid so that the small edge of the next panel will overlap it.