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Faculty of Graduate Studies

Bisrat Tariku

  • BSc (Adama Science and Technology University, Ethiopia, 2020)
Notice of the Final Oral Examination for the Degree of Master of Applied Science

Topic

Moisture Response of CLT Floor Assemblies Under Indoor Water Leakage: Experimental and Simulation-Based Assessment

Department of Civil Engineering

Date & location

  • Monday, August 11, 2025
  • 10:00 A.M.
  • Virtual Defence

Examining Committee

Supervisory Committee

  • Dr. Phalguni Mukhopadhyaya, Department of Civil Engineering, ßÉßɱ¬ÁÏ (Supervisor)
  • Dr. Lina Zhou, Department of Civil Engineering, UVic (Member)
  • Dr. Guido Wimmers, School of Construction and the Environment, British Columbia Institute of Technology (Outside Member)

External Examiner

  • Dr. Caterina Valeo, Department of Mechanical Engineering, UVic 

Chair of Oral Examination

  • Dr. Kirstin Lane, School of Exercise Science, Physical and Health Education, UVic

Abstract

As mass timber gains widespread use in sustainable construction, the long-term moisture performance of Cross-Laminated Timber (CLT) under damp service conditions remains a critical durability concern. This study investigates the effects of indoor water leakage on CLT floor assemblies through controlled laboratory testing and hygrothermal simulations using WUFI 1D and 2D. Six assembly configurations were evaluated, including variations in surface exposure, joint conditions, and end-grain vulnerability. Results revealed that end-grain surfaces are highly susceptible to deep moisture ingress and prolonged retention, while inadequate joint sealing facilitates moisture infiltration through panel interfaces. Assemblies with cracked concrete toppings and no moisture barrier underneath showed deep moisture intrusion. Hygrothermal simulations showed some similarity to the experimental drying trends, but significant deviations were observed; in particular, the 2D simulations exhibited even greater divergence due to multidirectional moisture transport and material property inputs required in two dimensions. This research highlights the importance of interface detailing, protective measures, and simulation-based assessment in enhancing the moisture durability of CLT assemblies in building’s service life.

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