Processing regulations NedZink NOVA COMPOSITE

For NedZink NOVA COMPOSITE are, besides the general processing regulations for NedZink NATUREL, NOVA and NOIR, additional processing techniques applicable. 

Processing Technique

Sawing

NedZink NOVA COMPOSITE panels can easily be sawn with Jig saw and circular sawing machines. When standard tools are used, zinc causes accelerated wear to the cutting edges. Shearing

NedZink NOVA COMPOSITE is easily sheared with a guillotine. A slight drawing of the zinc cover sheet caused at the impact side should be noted. The clamp on the shear should be fitted with a shock-absorbing rubber pad to prevent damage to the cover sheet. If a sharp cut is wanted, start cutting or punching from the non-visible side. Minimum diameter of the perforation 4 mm, minimal distance between and distance from the edge: 4 mm.

Routing

NedZink NOVA COMPOSITE can be easily routed on conventional routing machines and CNC machines. To avoid pressure marks on the NedZink NOVA COMPOSITE surface, please use plastic or wood vice jaws when chucking the work pieces.

Composite panels can be shaped by means of a simple processing technique. This procedure, the routing and folding technique, enables a variety of shapes and sizes to be manufactured. V-shaped or rectangular grooves are routed on the rear of the panels with disk or end milling cutters, whereby the zinc cover sheet at the front and part of the polyethylene core are retained. The small thickness of the remaining material then allows folding by hand. A brake press is not required. The groove shape determines the radius of the bend. Never bend zinc under 7°C -> risk of cracks in the zinc surface.

Bending

NedZink NOVA COMPOSITE can be formed by conventional metal and plastic fabrication methods. Certain specific points should be noted relating to the multilayer structure combining materials of different characteristics. The surface should be protected from damaged by affixing plastic film or inserting polyethylene of 1 – 2 mm thickness or plastic film strips during processing. The spring-back effect experienced when folding sheet metal is larger with NedZink NOVA COMPOSITE. For production series a prototype should be made.

Screwing

Please take the thermal expansion of the panel into account when using threaded fasteners outdoors. To avoid jamming, the hole diameter in the panel must allow for the expansion. Fastening without jamming is possible with fascia screws made of stainless steel with sealing washer that have been approved for construction. The screws must be suitable for the corresponding substructure (please note the information given by the manufacturer). The screws should be tightened with a torque wrench or screwdriver so that the sealing washer is placed on the panel for sealing the bore hole without exerting pressure onto the panel. Multi-step drills or hole gauges having corresponding diameters are used for centrically drilling holes into the panel and the substructure and for centrically fitting the rivet. NedZink NOVA COMPOSITE panels can be fastened together or joined to other materials with rivets common to aluminum constructions. For outdoor use and for use in areas of high humidity, aluminum blind rivets with stainless steel mandrills should be used to prevent ugly corrosive edges. Please take the thermal expansion of the panel into account (2.2 mm/m/100°C). To avoid jamming, the hole in the panel must be large enough to allow for expansion. Mount the blind rivet in a sufficiently sized hole so the proper contraction and expansion of the panel is assured. Adjust the pressure of the blind rivet to the use, possibly using an attachment to distribute the pressure over the panel surface to prevent denting. Adjust the length of the blind rivet to the total thickness of the package (panel and material behind it). Test to ensure that the connection meets the requirements. In order to drill centred attachment holes, we recommend using a centring drill that drills both holes during one drilling motion. Please always remove the protective foil in the riveting area prior to riveting.

Gluing

Gluing NedZink NOVA COMPOSITE is possible. Please consult your glue supplier for information on witch type of glue to use for your application

Drilling

NedZink NOVA COMPOSITE can be drilled with twist drills normally used for metal and plastics on machines common for metals. Centre if necessary. To position an overdimensioned hole correctly when drilling attachment holes into a rear construction, we recommend using a countersink.

Screwing

When screwing the panel in the exterior, it is important to ensure that the water-resistance of the façade is maintained. Neoprene underlay rings with stainless-steel upper rings may be used for this purpose. To make free shrinkage and expansion possible, the hole in the panel must be big enough. The screws must be adjusted to the increasing load and meet the requirements. Tighten the screws with a torque wrench to achieve the correct pressure. If the panel is tightened too much, it will not function any more, and will warp and damage will occur. Always make a test piece to check that your tools are suitable for working with NOVA COMPOSITE. When working, always work with the rolling direction of the zinc. That will always be indicated on the back of the NOVA COMPOSITE panel.

Installing NOVA COMPOSITE

Generally speaking we recognize 4 basic types of installing NedZink NOVA COMPOSITE Gluing, Clamping, Cassettes, Screwing. Next to these 4 basic types of installing other possibilities exist. In this case always do a test to see if your application is possible. It is always advisable to do a test to find out whether the requirements have been satisfied. There are no simple calculations available to make that determination. Zinc is a very durable metal but you need to take some precautions if you are installing NedZink NOVA COMPOSITE. Make sure that there is no permanent water on the zinc. Drill drainage holes were necessary to avoid this. See this manual (Chapter 10) what not to do with zinc. NedZink can never be held liable for any installation errors.

When detailing cassettes it’s important that the zinc patina will not be damaged. If the zinc patina no longer protects the zinc a phenomenon called “white rust” can occur. White rust is not under the guarantee of NedZink NOVA COMPOSITE. Take the right precautions while detailing Cassettes. Avoid standing water. Drill drainage holes of at least 8mm. Leave enough ventilation space between the composite material and the support structure. Avoid any contact with insulation material. With the right precautions you will enjoy NedZink NOVA COMPOSITE for many years. If you have any question on this subject, please contact NedZink.

Download Installation Guide NedZink NOVA COMPOSITE

Also applicable for NedZink NOVA COMPOSITE are the standard processing regulations for NedZink NATUREL, NOVA and NOIR. 

Material characteristics

NedZink NATUREL is raw titanium zinc produced according to EN 988 and Lloyd's Register certified. NedZink NATUREL has a natural, rolled surface. NedZink NOVA and NedZink NOIR are pre-patinated types of zinc that are produced by means of a phosphating process. The basic material is natural NedZink titanium zinc. By phosphating the material, a surface very close to the regular natural patina is obtained. All properties of zinc remain unchanged during this process.

Every rolled metal, NedZink material included, will show tensions in a certain way. This is a consequence of the rolling process. With modern techniques, these tensions are reduced to a minimum. Nevertheless, it may be that these tensions occur, to a lesser degree, after the NedZink material has been processed by third parties.

Surface protection

NedZink NATUREL is supplied with a bright, rolled surface. Exposure to the outside air and moisture results in a protective layer of zinc carbonate, which is called the patina. This process begins immediately after installation and will continue until a uniform patina is obtained. In the beginning, the appearance of the patina layer can be a bit mottled. Other factors that play a role in this patina process are: the orientation / geometry of the building, the weather conditions during assembly, and the storage of the titanium zinc prior to assembly.

NedZink NOVA and NedZink NOIR are natural products and as a consequence minor colour nuances will occur. A unique production process results in an extremely constant colour, but there is always a possibility on colour variations (production batch related). Use material from the same production batch for each particular project to avoid colour variations. The production batch number is stated on the back of the material.

Always mount NedZink NOVA and NedZink NOIR in the same rolling direction (also in order to avoid colour variations). The rolling direction is indicated by arrows on the backside of the material. This rolling direction must be checked before installing the material. 

Salt deposition

In a maritime climate, the salt in the air and/or water can react with zinc and form a zinc chloride on surfaces that do not get rinsed off by rain water. This appears as permanent white patches. These white patches do not have any impact on the functionality of the zinc and do not cause corrosion. In the absence of rain or on surfaces sheltered from rain, it is necessary to clean these areas regularly with (warm) water. NedZink is not responsible for the effects of salt deposition.

Anti-Fingerprint (AFP)

An Anti-Fingerprint coating is applied to prevent fingerprints during installation and to optimise machine processing. This AFP gives the material a slightly shiny surface, which will disappear over time.

Protection foil

Upon request, NedZink NOVA can be delivered with a temporary protective foil in order to reduce the chance of damage during processing & handling. NedZink NOIR is supplied with this temporary protective foil as standard. The foil is not permanently UV resistant and is only intended for temporary protection. The foil should be removed immediately after installation on the construction site. The temperature of the zinc must be at least 7 °C when the foil is removed. The foil should not be worked into assembly joints such as standing seams. Moisture between the zinc and the foil must be avoided at all times. If NedZink NOVA or NedZink NOIR are ordered without foil, the material will be more susceptible to scratching during handling. 

Installation

Titanium zinc from NedZink can be used in ventilated and unventilated applications. In all cases (either ventilated or unventilated) the recommendations as stated on www.nedzink.com or in the technical instruction handbook from NedZink must be followed.

Zinc is a metal that expands and contracts with changes in temperature. In all cases, there must be an allowance for the free thermal expansion of the material when installed.

Titanium zinc and other materials

  • Because of the difference in electrolytic potential, titanium zinc may not be used together with the following metals: copper – lead – iron – gold – platinum – silver – nickel – cobalt – cadmium – chrome – tin – palladium – mercury
  • Direct contact with new concrete, lime, bitumen, mortar (and other products that contain cement) must be avoided at all times.
  • In connection with leaching, titanium zinc may not be used in combination with thatched roofs or Western Red Cedar wood. For other wood types, please refer to www.nedzink.com or the technical instruction hand book from NedZink.
  • Zinc is not recommended for use in combination with the following types of glue: acidic silicones and epoxies, urea/melamine glues, phenol-formaldehyde glues.

Soldering

A major advantage of NedZink material is the possibility of soldering the joints. In places where a solid, watertight joint is required (for example at gutters), soldering is done using a copper soldering iron and lead-tin solder and the appropriate soldering flux.

NedZink NOVA and NedZink NOIR can be soldered in the same way as new natural zinc, but special attention is needed. To obtain a good solder joint, the pre-weathered finishes on the surfaces to be soldered must be removed completely. This can be done by sanding or by rubbing the patina layer with a soldering flux, waiting a few seconds and then removing with a dry cloth. There are several brands of soldering flux that are ‘suitable for titanium zinc’ that can produce good results. For further soldering advice, please visit www.nedzink.com.

Mechanical processing

Below a material temperature of 7 °C, the zinc should not be deformed mechanically in order to avoid damage to the zinc (e.g. micro-cracks).

Transport and storage

The zinc must be adequately packed to avoid damage during transportation. NedZink products must always be transported in dry and ventilated conditions. The strips and sheets must be protected against transportation damage (scratching, denting).

NedZink material must be stored in a dry and ventilated area and protected against damage and especially against excessively high air humidity. Outdoor storage is not recommended.

NedZink B.V.

For more information about NedZink products, please refer to the technical instruction handbook from NedZink. This is available for download from this website. We can also send you a hard copy by mail. These processing regulations are produced with the utmost care. All information specified in these regulations is according to our current knowledge, and gives information about our products and their uses. No rights can be derived from the content of these regulations. 

Download processing regulations NedZink NATUREL, NOVA and NOIR