The Coversys elements are made from the highest quality raw materials, according to the latest production techniques, which protects them against any form of corrosion risk:

• The ALUZINC PLUS is extremely durable due to its special protective layer of Aluminium and Zinc. Aluminium in contact with the atmosphere reacts and forms a natural protection against corrosion. The Zinc protects against the cathodicreaction.
• After the elements and accessories have been formed they are additionally treated with a polyester coating (±70 µm) to prevent exposure to precipitation.

Special nails for the installation are also galvanised and painted.

A test report (on applied elements, registration on 1 meter distance of impact, artificial rain) of the Belgian WTCB provides the following global results in dB(A): 56,4 dB for the clay tile, 65,8 dB for the Pearly version. This corresponds to a soft and loud voice.

The question is however "irrelevant" where roofs are thermally insulated, which tempers any noise. The same applies when the Coversys system is used as over-roofing on an existing cover.

The R&D department of Coversys, in close cooperation with the manufacturer of the steel and the coating, specially developed the Coversys coating (polyester powder painting) for this purpose. All long term and short term tests ensure the quality of the system, allowing Coversys to offer the end-user a warranty of 30 years, on all products, and this even in the most extreme climatic conditions.

The "High Solid" polyester coating is compared to water-based emulsions completely indifferent to water, avoiding eventual white staining.

These special nails, specified by Coversys, are made from hot galvanized steel with 35µ Zinc thickness, additionally coated and as such protected against corrosion risk (salt-fog test - 500 hours).

The use of small roofing elements (±1200 mm x ±400 mm) avoids thermal dilatation, a problem with existing long tiles. The nails remain therefore well fixed. According to the DIN 1055/4 the Coversys roof resists experimentally to wind velocities of more then 145 km/h. Experience and specific calculations inform us that the Coversys roof withstands wind speeds up to 220 km/h - especially when the pitch is between 12 to 15°.

With the Coversys system, any classic roofing application is possible if the specific installation rules are observed. There is also a range of Coversys accessories available to assist with the installation.

Tiles and accessories are cut by the guillotine or nibbler - the use of an angle grinder is not advised. Bending is done by the bender or pliers.

Thanks to the cathodic protection, and the ALUZINC PLUS, the cut edge (by guillotine or nibbler) is completely protected against corrosion. As an additional precaution (indicated in the application guidelines) we advise to cover each cut element by a non-cut element. In the exceptional case that a cut edge is not covered, it can be treated with a specific spray (retouch).

According to the British approval (BBA), the minimum slope, using a membrane, is 7°, this due to the specific overlap and design of the Coversys elements.
The minimal accepted slopes are: 15° for shingles, 22° for the clay or concrete tiles, and 25° for slates.

The resistance, in fact, depends more on the roof structure. The maximum snow weight is basically set on 1500 kg/m², which is easily accepted by the Coversys elements.

The Coversys system is in its country of origin - Belgium - certified and approved - ATG approval 98/2281. There are furthermore a lot of other approvals and test reports; Germany (ZVDH), France (class M1 by the CSTB), UK (BBA approval), etc.

High quality steel, certainly when covered with a "high solid" polyester coating, can be, with the exception of natural slates, more expensive then classic roofing materials (shingles, clay and concrete tiles, artificial slates).

Nevertheless, the global price including all the roofing components (installation cost, timber work, membrane, etc) is quite similar or even cheaper (versus clay tile and slate) for new construction. For renovation the Coversys system is in most cases considerably cheaper as the existing roof covering does not need to be removed.

The low weight (±6 kg/m2) of the system can offer considerable savings on the roof structure (labour and material), but also with the installation of the elements (150 m2/person/day). The elements are, due their specific dimensions, easy to handle, stock and transport (1 pallet - 1000 kg - 160 m2).

Greenness may occur everywhere on a roof. Under extreme circumstances (no sun, under trees, humid atmosphere, etc) this will also be the case for a Coversys roof. Cleaning can be done by high-water pressure cleaning (max. 100 bar and 10 cm distance).

Algae may appear on the granulated finish, but are only superficially as the Coversys system is protected by a polyester coating that is completely indifferent to water. Opposite to water-based coatings (containing fungicides), the polyester coating is not affected.