Darrell Paul Email & Phone Number

Greater Calgary Metropolitan Area

After 38 years, I've retired from Qualistat Building Performance, having sold the company in 2019. Recently I was in introduced to a new insulating sheathing called BTRboard. It is in development and is such an innovative product. BTRboard integrates OSB, Type X gypsum, or plywood with a proprietary highly insulating fire resistant foam to provide up to nominal R-8.3 with only about 1 1/2” thickness to replace conventional non- insulating sheathings. Great for zero lot line houses requiring 45 minute assemblies.

Calgary, Alberta, Canada

Qualistat Building Performance Consultants Ltd is part of the VT Group of Companies. VT Group is made up of Acacia Engineering and VerdaTech Energy Management. Offices in Calgary, Edmonton and Olds, Alberta. The group focuses on single and multi family wood framed construction from Mechanical engineering, to 9.36, NECB and energy efficiency combined with building envelope design, review and diagnostic assessments and forensics. SpecialtiesEnerGuide Ratings, Building Envelope Testing & Diagnostics, BuiltGreen Ratings, HVAC Diagnostics, Heat loss and design and balancing