Eurotray^® Roll Seam

Eurotray® Roll Seam Performance

With shadowed elegance, this simple but stylish profile can be formed from steel-based materials as well as copper and zinc. Creating a slightly softer finish and a larger shadow effect than Eurotray® Roll Cap, Eurotray® Roll Seam can be machine curved to allow for more expressive detailing.
 

Sheet Tolerances
Cover: ±5mm - Sheet length: +10, - 0mm (Steel)
Cover: ±10mm -15mm - Sheet length: +0mm, -15mm (Aluminium, Copper and Zinc)

Roll-forming facility location: Auckland, Christchurch and Invercargill

Curving facility location: Invercargill

Sheet lengths: Eurotray®Roll Seam is custom run to order. Also available to be manufactured on site

Where long sheets are used, consideration must be given to:

• Special transportation licences for sheets over 25m
• Site access for special lifting equipment
• Fixing techniques to accommodate thermal expansion

Oil Canning

Oil Canning is the visible waviness in the flat areas of metal roofing and walling. Oil canning produces an aesthetic effect inherent in standing seam tray profiles and profiles/flashings with wide flat elements. It does not cause detriment to product performance.

Oil canning can occur during the forming and installation processes and during thermal expansion of the roof sheeting during its life cycle. The effect can be more or less pronounced depending on differing light and sun angle conditions and the coating gloss levels.

For fully supported standing seam tray profiles, oil canning can be reduced by the vented roof underlay (e.g. Tyvek Metal), in addition, backer rods under the tray can also be used.

There are several options to reduce the oil canning effect in tray-type profiles and flashings, for example,

a) increasing the thickness of the material,

b) using stiffening swages in wide flat elements and

c) limiting flat elements to less than 150mm width.

For further information, please refer to the New Zealand Metal Roof and Wall Cladding Code of Practice, Section 12.3.

Eurotray® Roll SeamFastener Design

Eurotray® Roll Seam roof cladding must always be installed over a plywood (12mm minimum) substrate with a moisture content of less than 18% and made wind tight, with purlin supports underneath at 600mm centres in low to high wind zones and 400mm centres for very high and extra high wind zones. 8g x 40mm countersunk stainless steel screws at 150mm centres around the panel edged and 200mm centres on the intermediate supports. The fasteners should be no closer than 10mm to the edge.

A 3mm expansion gap should be provided between the sheets. All joints should be staggered and taped over before placing underlay, Dimond Roofing recommend the use of vented type underlay. This allows added air-flow between the underside of the tray and substrate, it also helps to reduce oil-canning in the tray.


Fasteners that are used to secure Eurotray® down as a roof cladding must penetrate through the substrate and into the purlin a minimum of 30mm for timber and 6mm for steel purlins. For wall cladding the fasteners must be long enough to pass through the substrate, cavity batten and into the main frame by 30mm for timber and 6mm for steel.

Design

Fasteners must be fixed closer together on the periphery edges of all roofs in areas of High to Extra High Wind Zones.

Unlike profiled metal cladding, the point load imposed on a fully supported cladding is supported by the substrate underneath.

Fastener Layout Example