Standing Seam Roof Flashing Details

Clipless one piece positive locking standing seam panel that provides a timeless roof appearance.

Standing seam roof flashing details.

Whenever possible begin trim installation at the downwind end of the roof farthest away from the source of prevailing winds to allow flashing laps to face away from wind driven rain. Other flashings include gable trim which runs up the sloped ends of the roof and drip edge or eave trim. Locate round penetrations centrally in the panel seal with butyl tape beneath base. Copper locking strips of the same weight as the flashing are soldered to the pans between seams at least 6 from the wall and engage the base flashing in a 3 4 lock.

Fasten with appropriate substrate fastener at minimum 4 fasteners per zee or 3 inches on center. The continuous locking strip is soldered to the valley flashing. Standing seam consists of sheet metal roofing panels joined side by side and attached to the roofing deck with concealed fasteners. There are a couple of key types of flashing or trim that are used to seal each part of the metal roofing system.

The flashings and trims shown in this book are standard parts. Refer to the details in this book for the proper location of fasteners and sealants. The standing seams are laid flat 8 from the vertical wall folded 3 4 and secured with copper cleats spaced 12 o c. 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.

The connecting point where the two separate metal panels meet forms a vertically pointed rib or a seam that is one inch to inch and a half high. The most common flashing for standing seam roofing is the ridge cap which is used at the peak of a roof where two opposing roof slopes join and attaches to the roof with z flashing. Install additional sections of hip ridge flashings with minimum 4 inch end laps and tube sealant at laps. Panel sidewall flashing counter flashing butyl tape or tube sealant.

Use hip ridge flashing to locate correct position of zee closures. Apply a row of tube sealant along back face of zee closure adjacent to panel legs. Sidewall details for standing seam sidewall option 1 using counter flashing panel goes down first then the z channel and then the sidewall flashing then the counter flashing and finally the tube sealant. The copper roofing laps the valley flashing a minimum of 6 and is folded and locked into a continuous copper locking strip.

Rivet hip ridge flashing to top flange of zees at 18 inches on center both sides. Then fillet with one part polyurethane. This detail shows a method of detailing a valley condition on a standing seam roof. Colonial seam continuous standing seam metal roof panel with an integral seam.