VM ZINC PLUS VM ZINC PLUS is an exceptional product that combines our high quality rolled zinc alloy with a plastic coating applied to protect the material's underside from corrosion. VM ZINC PLUS is available in both preweathered surface aspects (ANTHRA-ZINC and QUARTZ-ZINC). This innovative product extends the capabilities of regular VM ZINC® in the following ways:   It makes it possible to install on roof decking that is made of incompatible materials.   It makes it possible to install in a "warm roof" application where the underside of the zinc and support are not ventilated.   VM ZINC PLUS can be bent, folded or profiled without any surface changes (similarly to natural VM ZINC®) and thus allow the exact same methods of laying.     How is it made? To create VM ZINC PLUS, a 60 micron thick liquid polymer is applied to the underside of the zinc. The two are then heated to adhere the protective coating and seal the underside. This is performed at VM ZINC® Inc. factories under strict quality control. The type of coating used, as well as its thickness, are important factors in the durability of this product. Incompatible substrates Some materials are not compatible with zinc. For instance, woods with pH less than 5 must be avoided since they can have a corrosive effect on zinc in the presence of humidity. Plywood can also be problematic since it can be composed of acidic wood species or may contain tanins or phenolic glues. Laying zinc on acoustical felt or other absorbent materials could result in the zinc being in constant contact with moisture that can have a corrosive result. The solution to all these incompatible supports is to use the VM ZINC PLUS. Its protective coating safely isolates the zinc and allows for exceptional durability without the need to install a separation membrane. Warm roof solutions Usually zinc requires a ventilated underside, or so called "cold roof", which provides a continuous exchange of air over the material's underside surface. With VM ZINC PLUS this additional ventilation can be eliminated. This allows an extremely compact roof and the ability to use zinc in cathedral ceiling applications. With VM ZINC PLUS the designer has capabilities that are not available with other zinc suppliers. In fact, VM ZINC PLUS is the ONLY way to reliably implement a warm roof utilising zinc.