Last updated: May 2026
What This Site Covers
Verzatek focuses on the technical aspects of building envelope airtightness. The content is organized around three core areas: how blower door tests are conducted and interpreted, which materials are used for air sealing different types of joints and penetrations, and what airtightness benchmarks apply to Canadian residential construction under current codes and voluntary programs.
The site is written for contractors, building energy advisors, and construction professionals who need concise, factual reference material without commercial framing. Articles do not promote specific product brands or contractors.
Editorial Approach
All content is written in a descriptive, neutral tone. Figures and technical benchmarks cited in articles are drawn from publicly available sources, including:
- The National Building Code of Canada (NBC)
- Natural Resources Canada publications on EnerGuide and R-2000
- ASHRAE standards referenced in Canadian practice
- Peer-reviewed building science literature
Where exact figures are not known with certainty, the text uses ranges or qualitative descriptions rather than fabricated statistics.
Contact
For questions about site content, corrections, or editorial inquiries, use the contact form on the homepage or send an email to info@verzatek.org.
Office location: Toronto, ON, Canada.
Disclaimer
Content on this site is for informational purposes only. It does not constitute professional engineering, building science, or energy advisory advice. Building performance depends on local climate conditions, construction methods, and site-specific factors. Always consult a qualified professional before undertaking retrofit work.