Zinc Flat lock traditional fully supported cladding composed of interlocking shingles. The shingles are made of 0,7 or 0,8mm thick elZinc® titanium zinc rolled according to EN988 and ASTM B69-13.
Normal shingle widths: 430, 530, and 600mm, nominal maximum length 2000mm. Cladding weight (zinc only) is between 6 and 7 kgs/m2.
Shingles 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.
Façade application: The cladding is normally rear-vented behind the supporting sheathing / boarding with a ventilating space of at least 20mm (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 is either ventilated with a ventilating space of between 50 and 100mm (depending on rafter length) under the substrate, or installed in an unventilated (warm) roof design which includes suitable methods for condensation control. A structural underlay (and draining membrane) is often required under the zinc to ensure air circulation to its underside.