Standing Seam Profiles

Self-support profiles resemble a single tray trough section but the ribs are generally narrower and the installation techniques more sophisticated. Pan widths for both types vary from 300 mm to 500 mm

Traditional tray roofs are fixed to solid sarking. Traditional shapes are angle seamed, double seamed, or roll cap. The angle seam is the most popular and the double seam is the least popular. The roll cap replicates old roofs with a capped joint installed over a longitudinal batten.

All tray roofing must have clearance between adjacent pans to allow for timber shrinkage and transverse thermal expansion of the pan. The non-existence of this clearance gap can cause excessive canning or quilting. Wall cladding laid horizontally may need additional support, extra to the standard bracket, to resist gravity loads.

One of the features of the supported tray types is that they can be formed by folding rather than roll-forming. This makes it possible to install roofs to buildings that are round or sinusoidal in plan, to have “random” pan widths, or to vary rib width discretely so that ribs are spaced equidistant from associated architectural features such as penetrations and windows.


Standing Seam Cladding on a Round Building.


 Source: UK Guide to Good Practice in Fully Supported Metal Roofing and Cladding 3rd Edition; © Federation of Traditional Metal Roofing Contractors



Some manufacturers have the facility to curve their trays in a concave or convex shape.


Roof-Wall Junction Without Needing Prickles

All tray roofs can be seamed at the junction of roof and wall, without the need for prickles.


Revision Category: 
4 - Clause Inserted
Revision Detail: 

New clause, inserted as part of a comprehensive revision of Standing Seam Cladding.