Products for a non-ventilated construction

NedZink Pro-Tec
To avoid any risks involved in non-ventilated systems we recommend using NedZink Pro-Tec. NedZink Pro-Tec is process-based compiled titanium zinc, available as NOVA, NOIR and bright-rolled zinc with a protective layer on the rear for applications in ventilated and non-ventilated constructions. The protective layer is a two-layer polymer lacquer system that protects the zinc from damage caused by water vapor and other substances. The outstanding processing properties offered by zinc also apply to this material. The protective layer on the rear makes NedZink NOVA Pro-Tec ideal for damp-proof systems.

Please note: if condensation issues occur during construction the zinc will not be affected, but the condensation could have drastic consequences for the construction and the insulation values to be achieved.

Separating layer/-foil
• Structured separating layer
When a separating layer is part of the construction, a structured separating layer can be used. The resulting airspace is used for gradual drying small amounts of moisture still present directly under the zinc surface. It also decreases the possibility of rearside corrosion of the zinc material. The cavity is not comparable with the ventilation space used in a ventilated construction and cannot replace its function! For sound-insulating and sound-reducing properties of the separating layer please contact the manufacturer.

• Structured separating layer with foil
This is a vapor permeable waterproofing barrier that can be installed as a separating layer between zinc roofing or cladding and the supporting substructure. The material has on outer layer of polypropylene mesh bonded to a vapor permeable membrane fleece foil. For small coverings with wooden-based panels the layer can be used only for separation, not as a fully functioning ventilation cavity. This cavity is not comparable with the ventilation space used in a ventilated construction and cannot replace it! For more information contact the manufacturer.

Insulation
There is a large variety of insulation systems and materials. Depending on the requirements of the project, application, construction and physical aspects of the building, various materials can be chosen, such as mineral fibers, hard foam,
FOAMGLAS®, etc.

Damp control
A damp control course must be fitted under the thermal insulation. This screen is designed to make the roof construction airtight and seal it off from the damp produced in the underlying rooms. The damp control course is fitted so that all the seams between the various parts of the damp course, as well as between the damp course and other parts of the building, are airtight. To do so you must seal it. This can be achieved using a sealant or tape, which may or may not be supplemented by mechanical fixation. If possible, it is desirable to always fit the air and damp course on top of the support structure or the battening and on a continuous surface. This can significantly simplify the installation. A damp control course with an Sd value > 150 meters is required.