B&B Sheet Metal’s batten seam roofing comes in a wide variety of shapes and sizes that efficiently secure the roofing and also permit a wide variety of design expressions. It is generally used on sloped roofs, and consists of copper pans running parallel to the roof slope, separated by wood battens covered with copper caps that are loose-locked into adjacent pans.

Pans are pre-formed or field-formed in widths determined by roof design and copper weight, and transverse seams are used to join the ends of pre-formed pans. Pan expansion is accommodated by a design gap of 1/16 inch between a batten and the upstanding pan leg on either side. This gap is created one of two ways using 2×2-inch battens: The preferred method tapers the batten 1/16 inch from top to bottom on both sides and the upstanding pan leg is formed vertically; the alternative method shaves 1/16 inch off each side of the batten from top to bottom and the upstanding pan leg is formed at an angle greater than 90 degrees to meet the batten cap.




All flashings and trim are available to be manufacturer by B&B Sheet Metal to match with panel selection. B&B Sheet Metal’s capabilities include press-breaking, notching, shearing, welding and much more. Shop drawings of flashing details are available upon request. B&B Sheet Metal can provide assistance to typical flashing standards and conditions. For more information of details of flashings and trim contact us directly.


Batten seam roofing is for use on any type of smooth, flat roof decking, and roof slopes of less than 4 inches per foot, or areas where ice, snow or heavy rain conditions occur. For roof slopes between 4 and 6 inches per foot, transverse seams must also be used. Use 16-ounce copper sheets for pans up to 20 inches wide, or 20-ounce sheets for pans 20-26-inches wide. Batten caps are joined at their ends with ½-inch locks or lapped at least three inches in the direction of flow. Batten caps should be formed of the same weight copper as the underlying pan. The preferred gable rake method is to set the battens flush with the roof edge with caps extended to become a rake strip locked into the edge strip. Ridge and vertical battens are sealed with extensions the upstanding pan legs. Valley seals are created by either soldering a continuous locking strip to the valley flashing or double-folding the flashing to receive the roofing ends, and undercutting the battens to allow the valley flashing to pass underneath. The batten ends are then covered with copper. Power seamers and and power pan forming equipment are available for purchase or rental. Contact B&B Sheet Metal for more information.
Finish & Color Availability


  • 16oz and 20oz Copper
  • 16oz Lead Coated Copper
  • 16oz Freedom Gray Copper
  • 16oz and 20oz Evergreen Copper
  • .032 Kynar Aluminum
  • 24ga Kynar Galvanized
Finish & Color Availability

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