Standing Seam Materials

Traditionally tray roofs were manufactured from sheets of copper or pure zinc (sometimes even lead) and these materials are still popular being naturally durable and weathering to a natural patina.  They are also very malleable which allows more variation in intersections and terminations, and they can be soldered.

More common in the New Zealand market are pre-painted steel and aluminium substrates.  To increase its formability, Steel is normally supplied in Medium Strength G300 grade and Aluminium in hardness grade H34.

See Materials for a more thorough discussion of roofing material.

Revision Category: 
3 - Substantial change to recommendation
Revision Detail: 

This sub-clause has been entirely revised as part of the revision of the main clause Standing Seam Cladding.

Draft Clause: