Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Better protection for wood


Coatings used to protect the exposed wooden parts of buildings have to withstand all kinds of weather. To avoid over-frequent renovation, architects, builders and house-owners are advised to look for a reliable quality label. The relevant European standard is being revised.

A weather-beaten mountain chalet might look charming – but assaults by heat and cold, rain and sunshine, will eventually destroy even highly weather-resistant timber like larch. Outdoor paint or varnish is expected to prolong the life of most types of timber, and of course stand up to years of exposure to the elements.

If the paint begins to flake sooner than the house-owner anticipated, in the worst case the paint manufacturer is likely to find himself faced with a claim for damages. House painters, producers of garden furniture, and architects are not willing to be left carrying the blame. That is why it is advisable to look for a quality label when choosing the appropriate product.

Such a quality label is awarded by the Fraunhofer Institute for Wood Research WKI since two and a half years. It is based on the authoritative but not binding European standard DIN EN 927 (coating materials and coating systems for outdoor wood surfaces). The standard is revised every five years – due this month.

“Manufacturers of wood coatings have long demanded a standard that pays greater heed to practical considerations,” stresses Guido Hora, committee chairman and head of the WKI department for surface technology. “We particularly need new definitions for sample geometry and material properties in Parts 3 and 5 of the standard.” Part 5 defines the laboratory procedures for determining the liquid water permeability of coated timber. Part 3 – recently incorporated in ISO 16053 – specifies the conditions under which open field tests are to be carried out.

Another issue that the committee members intend to discuss during the revision process is the unfortunate predisposition of paints and varnishes to flake away from the underlying surface from the edges inward, as frequently experienced in garden furniture. “Outdoor timber shouldn’t have any sharp edges, but this requirement is often ignored,” Hora reports from experience. “To limit liability for defects of this type, we need to define a minimum standard edge radius. This is likely to lie in the region of two to three millimeters.”

Before a manufacturer’s exterior wood coating product can be sold with the quality seal, it has to pass a number of tests. These can be performed by the company’s own R&D department which, given the growing complexity of consumer product requirements, is often specialized in this activity. Or companies can call on the services of an independent, certified test laboratory like the WKI. To update their knowledge, researchers meet during the 4th Woodcoating Congress to be held in The Hague (Netherlands), October 25 to 27.

Johannes Ehrlenspiel | alfa
Further information:

More articles from Process Engineering:

nachricht Applying electron beams to 3-D objects
23.09.2016 | Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP

nachricht New process for cell transfection in high-throughput screening
21.03.2016 | Laser Zentrum Hannover e.V.

All articles from Process Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

Im Focus: New Products - Highlights of COMPAMED 2016

COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.

In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Oasis of life in the ice-covered central Arctic

24.10.2016 | Earth Sciences

‘Farming’ bacteria to boost growth in the oceans

24.10.2016 | Life Sciences

Light-driven atomic rotations excite magnetic waves

24.10.2016 | Physics and Astronomy

More VideoLinks >>>