We sell a wide variety of roofing fasteners, accessories and specialty construction products. If these surface-mounted screw-through flashings are okay for penetrations, can someone explain to me why the same isn't also true of less-expensive exposed-fastener roofs themselves? The views and opinions of contributors to this Forum do not necessarily state or reflect those of MRA or its members, and they may not be used for advertising or product endorsement purposes. Mission Viejo, CA Posts: Here are five proven and practical guidelines to help avoid problems. Penetration-Free Attachment Standing seam metal actually offers advantages over other roof types when mounting of ancillary fixtures does become necessary. There may also be a need for satellite dishes, lightning protection, solar panels, advertising signage, fall protection systems—and the list goes on.
Roof Penetrations Architecture 9. Flashings and Copings 9. This method uses parts custom-fabricated from metal. Four methods are described here. The copper base flashing extends a minimum of 6" onto the roof in all directions. The copper base flashing extends a maximum of 4" onto the roof.
Architectural Details: Flashings and Copings - Roof Penetrations
For acceptable methods see BCA section on weather-proofing masonry. This method uses parts custom-fabricated from metal. Wherever one or more of the sheet ribs are cut, you must provide framing to support the cut ends of the roof cladding each side of the penetration. The standing seam area creates a beamlike structure that can provide an anchor for things like walkways, solar arrays, condensing units, and gas piping without harming the weathering characteristics of the roof.
Description: It is recommended that a stainless steel draw band be used at the top of the flashing to ensure that the flashing never inverts itself. Rooftops Present Big Risks The majority of the nearly 5, workplace fatalities each year occur as a result of a fall. Under flashings drain at the plane of the roof pan. This is a common question.