How To Flash A Roof Curb On A Metal Roof

A skylight in a metal roof must be curb mounted in order to be properly flashed.

How to flash a roof curb on a metal roof.

Galvanized or 18 ga. 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 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. If not you ll have to buy new flashing 50 to 100 either from the skylight manufacturer or from a roofing company that has a metal fabrication shop look under roofing.

Installation of velux skylights with edm metal roof flashing. This will ensure the roof flashing provides a watertight seal when installed on various roof pitches and accounts for any roof movement sharp says. Velux skylight flashing kits are designed to shed water without relying on sealants that can break down over time. Curb mounted means a box like structure constructed with 2 x 4 or 2 x 6 lumber that elevates the skylight off the roof deck.

Rtu curb for metal roof features factory welded rib pockets to match roof welded water diverter and perimeter insulation. Installation of velux skylights with edm metal roof flashing. Second the curb should be available in a variety of heights. A roof flashing with aluminum on the base edges will ensure the product can be formed to the metal roof profile.

Flashing a skylight may involve sealant as one line of defense against water infiltration but above all there must be good flashing. Roof curbs for standing seam metal roofs pick the proper material. A crucial part of our complete system. If it s carefully removed when the old roof is torn off it should be reusable.

Most residential skylights sit on a raised curb made watertight with metal flashing. Duct hangers or full height cross members or insulated panels fabricated as needed to match rtu manufacturer s factory curb. Ensure the roof flashing has the proper pleat design at the base.