The Greenkett Multilayer Parquet has been submitted to several types of tests in order to assess its features. Some of them will be briefly presented in the next lines:

1. – DIMENSIONAL STABILITY
The test has been conducted in compliance with the European Regulation EN 1910. It consists of reproducing humid environments inside a climatic chamber (18ºC and 50% RH). Samples of Greenkett parquet have been submitted to these environment for long periods of time, at the end of which humidity and piece deformations have been measures both horizontally (banana) and vertically (warp). Greenkett parquets submitted to this test never suffered deformations above 1 mm in length or width

2. – DIMENSIONAL TOLERANCES.
The geometrical characteristics of the Greenkett flooring system have been assessed by means of the EN 13647, as for length, width, thickness, noble layer, surface and side curvatures. In the case of the Greenkett Multilayer Parquet the result was correct.

3. - IMPACT RESISTANCE.
The impact resistance test is conducted dropping a 500-g steel ball from different heights on 24 randomly chosen points, between which there must be a minimum distance of 5 cm. In each impact point the imprint diameter is measured and the breakage of the lacquer film is assessed. All this will be done on a three-layer material sample arranged on 2-mm thick standard film supported by cement, concrete or similar material.

Not more than 2 varnish film breakages will be allowed if they exceed 50% of the imprint’s perimeter. The average imprint diameter should not exceed 12.5 mm and more than two impacts should not have a diameter exceeding 15 mm.

The results of the tests conducted on the Greenkett product were 9.6 mm (Tali) and 9.0 mm (Jatoba and oak). In other words, none of them exceeded 15 mm, and therefore results are appropriate.

4. – RESISTANCE TO WEAR.
The test consists of submitting a sample of the product to the action of a TABER abrasion tester in compliance with the EN 13696 regulation, until the varnished surface is 50% of the original.

The result for the Greenkett engineered wooden flooring in this test exceeded 3,000 revolutions.

5. – RESISTANCE TO DOMESTIC PRODUCTS.
The test is conducted in compliance with the procedure described in the EN 13442 regulation project. In this test, floorboards are submitted to the action of common domestic products (food, cleaners, acids, etc.). The contact time veers between 16 and 24 hours. Assault, changes in sheen and abnormal colorations are assessed using a score scale that goes from 1 to 5 to assess the results (5 – no visible changes, 4 – slight changes in gloss and colour, 3 – slight marks, 2 strong marks but no changes in the surface, 1 strong marks with changes in the product surface).

The results for the Greenkett product were:

6. – THERMAL CONDUCTIVITY.
Thermal conductivity is measured by means of the procedure described in the UNE 92-202. Thermal conductivity is the amount of heat that passes in the time unit through a surface unit of the sample when a certain temperature difference is established between the facing and the back. The lower the conductivity the more insulating and energy saving the product will be. The Greenkett Multilayer Parquet on a 4-mm thick polyethylene layer offers a thermal conductivity of 0.10 W/m ºK (in oak and maple) and of 0.093 W/m ºK (Tali and Jatoba)

7. – INSULATION TO THE IMPACT NOISE.
It is the reduction of the standard impact noise level rendered by a lining placed on the underlying floor slab. The Greenkett engineered wooden flooring placed on 5-mm fonpex foam, provides an impact noise reduction of 17 dBA, which meets the specification of the basic building standard NBC CA-88 of 80 dBA, on most of the different combinations of floor slab used for building purposes.

8. – EMISSION OF FORMALDEHYDE
Formaldehyde is a component of wood adhesives that is considered toxic from certain emission levels. The results obtained for the formaldehyde content in the Greenkett engineered wood flooring are those described in the UNE EN 120 standard, for class E1 (less than 8 g for each 100 g of mass of product)

9. - HARDNESS
This is the resistance offered by a material against penetration from another material. According to the Monin system, which is that included in the Spanish Regulation UNE 56-534, which consists of applying a weight of 100 kg per cm of thickness of the piece by means of a steel cylinder in a cross-sectional direction the fibres, hardness is inversely proportional to the depth of the mark left by the cylinder. For the Greenkett engineering wood flooring, results were 5.6 for oak, 9 for Jatoba and 5.8 for maple.

10. – REACTION TO FIRE.
According to the criteria established by the UNE 23727:1990 regulation, all Greenkett products have achieved the M-3 classification.

11. – TENSILE STRENGTH DETERMINATION OF PIECES MACHINED BY MEANS OF LOCK SYSTEM.
The pieces submitted to the test are assembled two on two and are submitted to a force with direction within their plane until they give way. In the case of the Greenkett Lock System Multilayer Parquet the necessary force to separate the pieces was of 11.33 KNm-1.