elZinc Angle Seam Cladding - Zinc Roof and Wall Cladding

A traditional fully supported architectural cladding system composed of site-seamed zinc trays. The seamed joint is 25 mm high and has a 12 mm front face. The zinc angle seam cladding can be used to clad facades (tray direction can be horizontal, vertical, or at angle) and roofs pitched above 25º (35º in regions with heavy snowfall). The zinc angle seam trays can be tapered, pre-curved to concave or convex panels, so almost any architectural geometry can be weathered using this system.

Angle seam facades exhibit fairly pronounced visual directionality, and various designs are available for creating different effects that can be used to reinforce the architectural design intent. Slight oil canning (quilting) is sometimes apparent, adding extra character to the zinc facade. The trays are made of 0.7 or 0.8 mm thick elZinc® titanium zinc rolled according to EN 988 and ASTM B69-13.

Normal tray widths: 430, 530, and 600 mm. Cladding weight (zinc only) is between 6–7 kg/m². Trays are fixed back to sheathing/ boarding using hidden stainless steel clips secured at pre-determined centres (according to exposure) by stainless steel (A2 grade) fasteners. Sheathing/ boarding to be laid flush, true and plumb, and its fasteners driven just below the surface. For buildings that require a non-combustible substrate for the zinc, trapezoidal metal sheet panels are used as a substitute for the wooden sheathing / boarding.

Facade application:

The cladding is normally rear-vented behind the supporting sheathing/ boarding with a ventilating space of at least 38 mm (some countries require more). A simple breather membrane is normally installed between the zinc and the substrate to act as a separating layer. 

Roofing application:

The roof either follows a ventilated design or an unventilated (warm) roof design. If ventilated, a space of between 50–100 mm (depending on rafter length) is incorporated under the substrate, and a structural underlay (and draining membrane) is sometimes required under the zinc to ensure air circulation to its underside. Installed in an unventilated (warm) roof design, suitable methods for condensation control are required, and elZinc Protect+ must be used.

Features and benefits:

• Naturally weathering, traditional cladding system based on the double lock standing seam.
• Principally used in facade cladding, on flat or curved areas.
• Weather-tight from 25º of pitch and above if used in roofing.
• Attractive design layouts complement different architectural styles.
• Available in three versions: Horizontal (the angle seam runs horizontally), Vertical (the angle seam runs vertically), or at an angle (the angle at which the seam runs to be specified).