Metal Roof Penatratiion Flashing

Flashings and cappings are strips of metal formed to weatherproof the edges of roofing and walling.

Metal roof penatratiion flashing.

Cut the decking back. Cover or counter flashings are used to seal base flashings. The upper edge is held by at least 2 cleats and is locked into the roof pans. These areas typically account for nearly 80 percent of all reported roof leaks.

Flashings and penetrations are particularly critical on low slope standing seam metal roof systems because the metal serves primarily as a watershed. They offer the most durable and weathertight solution to penetration back curb. The ezi seal is also suitable for profiled and corrugated roofs and is simply screwed fixed down to the roof with no need for silicone. Any batten or standing seams that are interrupted at the upper joint are to be continued below the lower joint.

The purpose of a flashing is to make the building weather resistant and to prevent water from entering the building by diverting it. The only solution after the metal roof is installed is to remove the roof panels relocated the vent pipe and reinstall new roof panels. Cover flashings are also used to seal rooflights upstand kerbs and plant support bases. The cover flashing is placed over the top of the sleeve and around the pipe extending down to cover top of the waterproofing upstand.

A stone and mortar chimney has an uneven surface and it is difficult to cut into. How to install a pipe boot flashing on a metal roof. A boot flashing is a proprietary epdm flashing designed to weatherproof cylindrical penetrations protruding from a roof or wall. The top is trimmed to form a tight weatherproof collar around the penetration and the base is formed with a series of concentric rings to the underside and a malleable stiffener of aluminium which is dressed to conform to the shape of the roofing profile.

Before installing metal roof panels. For the purposes of this chapter only the term flashing is used. All metal roofing specialists feels roofing penetrations such as chimneys and skylights present some of the most challenging flashings on a metal roof. A good example is the metal sleeve used to protect and seal plastic pipe penetrations on hot melt roofs.

Visit our dektite ezi seal flashing page or click on the picture for more details. The sponge gasket on the dektite ezi seal flashing make it the ideal flashing for polycarbonate roofs. Seal with butyl tape beneath base. Locate round penetrations centrally in the panel.

In all roofing systems installation of flashings and penetrations are the most critical points of application. Detail of pipe flashing through a standing seam metal roof click on image to see larger version use unitized epdm rubber pipe flashings black preferred with stainless steel draw band. Then fillet with one part polyurethane.