The division of „wood preservation“ focuses on the preservation of wood and wood-based products against damage caused by wood-destroying and wood-staining organisms primarily by chemical means. Wood preservatives are further developed, efficacy is investigated by means of laboratory tests and practical weathering trials. Damage caused in timber use is examined. Project partners are wood preservatives manufacturers, wood impregnations and wood-processing industry.
In cooperation with wood preservatives manufacturers, water soluble preservatives heavy metals free and fixed in wood are developed for dipping application to achieve a high biological efficacy and penetration. Furthermore, the requirements pertaining to occupational health and safety as well as to pollution control have to be met as additional essential criteria.
Fungi in buildings can cause economic damage and may pose a health hazard to people. Traditionally wood-destroying organisms are identified by macro- and microscopic characteristics. Time-consuming microbial methods are employed to isolate and culture fungi. The biomolecular methods developed opens up new pathways to identify fungi on the basis of their genetic fingerprint.
Discoloration caused by microbial growth on product surfaces is causing increasing problems for wood siding. To reduce the such microbial growth, different methods are investigated. Biocides be used have to be very efficient, i.e. water soluble and must not pose an ecological hazard. State-of-the-art surface finishes have to satisfy this demanding profile.
This project is designed to investigate the service life of poles impregnated with chromium-free wood preservatives. The effectiveness, leaching, retention period and residual quantity of the active ingredients are being investigated and monitored in practice. The project aims to predict the long term effectiveness of the impregnation and from the test results, the expected service life of poles.
The division of „wood preservation” is accredited for the testing of wood preservatives. The following test methods are included (selected methods, additional tests can be performed upon request):
Wood staining fungi:
The tests of wood preservatives can be performed in combination with ÖNORM EN 73 (evaporative ageing procedure), ÖNORM EN 84 (leaching procedure) or after natural preconditioning (in accordance with darft prestandard ÖNORM CEN/TS 15397).
Furthermore, leaching tests are performed in accordance with OECD (assessment of emissions from preservative treated wood in the use class 3 (Draft prestandard ÖNORM CEN / TS 15119-1) and 4 (draft prestandard ÖNORM CEN / TS 15119-2).
Additionally various test methods can be employed to demonstrate the biocidal effectiveness of a preservative which is intended for particular materials, e.g. product types 7, 8 or 9 according to the Biocidal Product Directive (BGBL I 105/2000).