Contact:

Dr. Roland Gründlinger (Ext. -57, Email)
Mag. Notburga Pfabigan (Ext. -23, Email)

PDF: Directory of Wood Preservatives 2017

fungal infestation
Fungal infestation of conifer timber
The breeding buck house to examine the insecticidal efficacy of wood preservatives require continuous skilled nursing
blue stain
Determining the effectiveness of a preservative in protecting freshly sawn timber temporarily against blue stain
Preservation of wooden utility poles with chromium-free wood preservatives

Seitenpfad

Chemical wood preservation

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.

Research and development

Development of water-based wood preservatives for application via dipping

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.

Biomolecular methods to detect wood-destroying fungi in buildings

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.

Protection of wood in exterior applications against blustain in service

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.

Preservation of wooden poles with chromium-free wood preservatives

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.

Testing and inspection

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-destroying fungi:

  • ÖNORM EN 113: Test method for determining of the toxic values against wood destroying basidiomycetes
  • ÖNORM ENV 839: Determination of the protective effectiveness against wood destroying basidiomycetes - Application by surface treatment 

Wood staining fungi:

  • ÖNORM EN 152-1: Laboratory test method for determining the preventive effectiveness of a preservative treatment against blue stain in service following preconditioning by natural weathering or using a QUV/Xenon weathering method
  • Field test method to evaluate the efficiancy of anti-sapstain wood preservatives (acc. to HFA AA S008)

Wood-destroying insects:

  • ÖNORM EN 46-1 and 46-2 (Determination of the preventive action based on larvicidial effect or a combined larvicidial and ovicidal effect against Hylotrupes bajulus (L.))
  • ÖNORM EN 47 (Determination of the toxic values against larvae of Hylotrupes bajulus (L.))

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).

Inspection

  • Inspection of the quality of pressure impregnated wood for attaining the AUSTRIA quality mark of the ÖQA “Österreichische Arbeitsgemeinschaft Qualität (Austrian Consortium for Quality)
  • Inspection and assurance of the quality of wood preserving agents for protection against sapstain in Euro-pallets (UIC-AG rules and standards, palletizing)
  • Quality assessment of wood preservatives for attaining a certificate from the Austrian working group on wood preservatives (Wood Preservative Association).Download: Directory of wood preservatives 2017 (973 KB)
Wood Preservative Association
Seal of approval of the Wood Preservative Association

Special facilities

    • Site for natural weathering and laboratory equipment for artificial weathering (QUV / Xenon)
    • Laboratory for microscopy (incident and transmitted-light microscopy, measuring microscope, various methods of sample preparation, digital image processing)
    • Gas-phase chromatograph with various detectors (FID, ECD and MSD) for the selected analysis of organic substances
    • ICP – OES for the analysis of inorganic compounds in wood, soil and water matrices
    • Application equipment (brushing, dipping, air gun spraying, airless spray painting, airmix spray painting)
    • Xenon-Suntester
    • Microbiology laboratory (PCR - Polymerase Chain Reaction) DGGE - Denaturing Gradient Gel Elecrophoresis, t-RFLP - Terminal_restriction_fragment_length_polymorphism, molecular cloning und sequencing)
    • Breeding of house borers (Hylotrupes bajulus L.)
    • Laminar airflow cabinet
    • Conditioned brood chambers
    • Wind tunnel (for performing the evaporative ageing procedure according to ÖNORM EN 73)

Additional information can be found at:

Wood surfaces

Analysis of structural defects /Endoscopy