P. Christopher Timusk, PhD


Christopher Timusk is a specialist in the areas of Building Science and Wood Composite Materials, with particular expertise in the areas of moisture physics and the durability of building materials, involved as an educator, consultant and researcher.

As a faculty member and researcher in the Angelo DelZotto School of Construction Management since 2005, he teaches courses in Building Science and Material Science, and is/has been involved in numerous Building Science related research projects such as Principal Investigator of the Argile $3million MRI funded project on the exterior retrofit of solid masonry walls, and projects with industry partners including Roxul, Owens Corning, Dow, Dupont, CertainTeed, Empire Homes, Doug Tarry Homes and others.

As a consultant in Building Science and the Owner/Director of PCT Building Science Inc., Christopher has worked on numerous cases involving forensic investigations of building failures, hygrothermal computer modeling of building enclosures, the performance evaluations of new designs and retrofits, as well as being retained as an expert witness, working for companies including the Canadian Wood Council, exp., buildABILITY and Brookfield Homes.  Christopher also taught for 11 years at the University of Toronto, Faculty of Applied Science and Engineering, in the Certificate program in Building Science.

Academic Credentials

PhD, Building Science - Civil Engineering, University of Toronto, 2008MScF, Wood Science - Forestry, University of British Columbia, 1997BScF, Wood Science - Forestry, University of Toronto, 1993

Areas Of Specialization

Building Science, Material Science, Construction Technology, Angelo DelZotto School of Construction Management

Areas Of Expertise

Building Performance (durability, energy efficiency, occupant health and comfort, sustainability) Hygrothermal Building Enclosure Modeling, Building Enclosure Retrofit, Building Enclosure Durability and Performance Field Monitoring and Laboratory Testing, High Performance Enclosure Design

Career Highlights

2005 to present: Professor, George Brown College2005 to present: Owner / Director PCT Building Science Inc.2000 to present: Senior Wood Specialist, exp., Building Science and Rehabilitation Division2003: CMHC Independent Contractor, Policy and Research Division2001 to 2012: Instructor, University of Toronto, Professional Development Centre, Faculty of Applied Science and Engineering1996 to 2001: Research and Development Coordinator, Ainsworth Lumber Company – 100 Mile House BC OSB Division1995 to 1996: Process Technician, Ainsworth Lumber Company, Alberta OSB Division1992 to 1995: Field Technician, Tradewind Scientific (Environment Canada Contract)

Other Activities

Owner / Director, PCT Building Science Inc.Consultant, exp. Building Science and Rehabilitation DivisionOntario Building Envelope Council (OBEC) MemberISO 9000 Certified Lead AuditorAmerican Plywood Association - Certified Inspector


Timusk, P.C. (2015). “An Innovative Building Enclosure Retrofit for an Existing Solid Masonry Double Wythe Home in a Cold Climate”, PLEA conference, Bologna, Italy.

Timusk, P.C. (2014). “The Quirkiness of OSB”, Nineteenth Annual Westford Symposium on Building Science, Westford, Connecticut, USA.

Timusk, P.C. (2010). “Retrofit Options for Vintage Solid Masonry Buildings”, Construct Canada, Toronto, Canada.

Timusk, P.C., Pressnail, K.D., Cooper, P.A. (2009) “The Effect of Board Density, Resin Content and Component Layers on the Permeability Properties of Mill-Fabricated Oriented StrandBoard”, 12th Canadian Conference on Building Science and Technology – Montreal, Canada.

Timusk, P.C. (2008) “An Investigation of the Moisture Sorption and Permeability Properties of Mill-Fabricated Oriented Strandboard”, Thesis, Doctor of Philosophy, Civil Engineering, University of Toronto, Toronto, Canada.

Timusk, P.C., Pressnail, K.D. (2005) “Moisture Related Properties of Oriented Strand Board (OSB)”, 10th International Conference on Durability of Building Materials and Components, Lyon, France April 2005.

Fugler, D., Sherif, R., Prochazka, C., Timusk, P.C. (2004) “Analysis of Ventilation System Performance in New Ontario Houses”, Canada Mortgage and Housing Corporation (CMHC) Research Report, Ottawa, Canada.

Timusk, P.C. (1997) “Experimental Evaluation of the ULAG Glulam
Beam Simulation Program”, Thesis, Master of Science in Forestry, Faculty of Forestry, Department of Wood Science, University of British Columbia.

Foschi, R.O., Prion, H.G.L., Folz, B., and Timusk, P.C. (1996). “Reliability based design of glulam beams”, International Wood Engineering Conference, New Orleans. 1:125

Cooper, P.A., Ung, Y.T., Aucoin, J.P. and Timusk, P.C. (1996) “The potential for reuse of preservative treated utility poles removed from service”, Journal of Waste Management & Research. 14:263-279.

Cooper, P.A., Ung, Y.T. and Timusk, P.C. (1994) “Comparison of empty-cell and full-cell treatment of red pine and lodgepole pine pole sections with CCA-PEG”, Forest Products Journal. 44(4):13-18.

Timusk, P.C. (1993) “The Feasibility of Recycling Used Treated Utility Poles”, Thesis, Bachelor of Science in Forestry, Faculty of Forestry, Department of Wood Science, University of Toronto.