Track 4: This New World: Preservation technology and emerging issues within our historic buildings and built landscapes

APT Student Scholar Abstract

1 - Comparative Performance Evaluation of Coatings on Common Albertan Wood Species

Tuesday, September 25
10:30 AM - 12:00 PM
Location: BNCC-106BC
Faculty Advisor: John Wolodko , Associate Professor – University of Alberta

6) Timber architecture, like at the Ukrainian Cultural Heritage Village and the log structures at Historic Dunvegan, represent the oldest buildings in the Province of Alberta. There are thousands of square feet of uncoated timber which deteriorate by UV, water, wind, ice, and biotic factors like fungi and insects. The specification of well-designed cyclical preventive maintenance and coating treatments could mitigate the costs associated with loss and replacement of original fabric.
The target of the project is to explore effective and low-content ( < 250 g/L) Volatile Organic Compound (VOC) coatings to prevent historic wooden buildings decay.
Laboratory characterization and measurements of four common Albertan wood species include Pine (Pinus contorta), Tamarack (Larix laricina), Spruce (Picea glauca), and Aspen (Populus tremuloides) treated with five different coatings (TWP 200, SIKKENS Cetol, Armstrong G-Clark, Linseed Oil (Remtech), and AUSON’s Pine Tar). The samples of a dimension of 3” x 6” x ½” are tested and compared with an untreated control group before and after accelerated weathering (Atlas-MTS UV Test Fluorescent, 800 hours, by 2 hours UV-B 313-irradiation and 18 min water spray cycles). Characterization tests include microscopy to identify the depth of penetration, colour measurements to quantify change over time, water vapor transmission test to determine the permeability of the wood coatings. Goniometry will determine the degree of a coating’s water repellency. X-ray photoelectron spectrometry (XPS) and Fourier-Transform-Infrared Spectroscopy (FTIR) may provide analytic chemical evidence of wood decay. Additionally, the laboratory tests will establish testing methodologies and characterization to be used during the second phase test wall.

Learning Objectives:

Hajo Spaethe, applicable BSc. Wood Science University of Hamburg and University of Freiburg, Germany

Masters Student Forestry
University of Alberta (Canada) & University of Freiburg (Germany)

In my undergrad, I studied wood science at the University of Hamburg, Germany which is not directly connected to preservation but it gave me a solid understanding of the working material - wood. In my Master's, I switched to forestry (conservation) at the Albert-Ludwigs University in Freiburg. As part of the Transfor-M program (an exchange program between European and Canadian universities), I studied my second year at the University of Alberta finishing with my thesis project (course-based Master): "Preliminary Evaluation of Coatings for Preservation of Historical Wood Structures in Alberta". The results will be presented at the APT Buffalo Niagara 2018.


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Dan Worth

Mr. Worth is Principal and Historical Architect with BVH Architecture with offices in Lincoln and Omaha, NE. Dan has 40 years of experience with an emphasis in historic preservation, rehabilitation, urban design, master planning, programming and project management. He has extensive experience with managing public facilitation and community engagement process. Over the last 35 years, Dan has completed dozens of master plans and designed / implemented large complex historically significant projects with civic and institutional clients including the National Park Service, Smithsonian Institution, State of Nebraska, University of Nebraska and the Nebraska State College System. Dan has been a leader locally, regionally and nationally in community and non-profit professional organizations promoting the best practices for planning and preserving our communities.


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1 - Comparative Performance Evaluation of Coatings on Common Albertan Wood Species

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