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Edge Finishes

Because the standing seam or the batten roll should terminate at the peripheral areas on the roof, this detailing will be determined by the type of intersection.

The three considerations are:

  • Weathering.
  • Expansion.
  • Appearance.
All flashing intersections must be made weatherproof without primary reliance on sealants. Provision must be made for expansion in two directions; acceptable joints are shown in the drawings shown in 11.8.

 

Standing Seam Edges

Three stages in preparing standing seam for cross welt at drip, ridge, apron or junction to valley gutter.

 

A double standing seam can be turned down through 90°, 150 mm from the eaves, with the folded side uppermost, and the end of the turned down standing seam folded into a cleat, drip or valley.

When the sheet is engaged into the folded edge at the stepped fall, an allowance should be made to allow for thermal expansion.

The turned down edge of the bay should not be able to disengage itself from the eaves flashing during thermal expansion, and there should be sufficient room to allow for free contraction of the pan or bay.

The double seam does not need to be folded over in roofs with pitches greater than 30° as the eaves flashing will prevent any ingress of moisture. The double seam is cut at the eaves, and only the end of the sheet is engaged in the eaves flashing.
The double standing seam with a splayed or angled lower end is the most demanding end detail, but it is the most visually acceptable.

 

 

Clause: 
015_004_009_000_000_000_000_000_000
Clause Number: 
15.4.9
/cop/other-products/standing-seam-cladding#edge-finishes
Revision Category: 
0 - Clause Removed
Revision Detail: 

This clause was removed during a comprehensive revision of Standing Seam Cladding, please see the new sub-clause Standing Seam End Laps.

Draft Clause: 
014_004_009_000_000_000_000_000_000