Last updated: May 2026

plainandhome.org is an independent, non-commercial reference covering residential window glazing, U-factor ratings, and frame options for the heating-dominated climates found across much of Canada. The focus is narrow on purpose: how windows lose and retain heat through a long winter, and how to read the published numbers that describe that behaviour.

Scope

The articles explain terminology and rating concepts in plain language. They draw on publicly available material from organisations such as Natural Resources Canada, the National Research Council of Canada, and ENERGY STAR Canada. Where exact figures vary by product or region, the text uses neutral descriptions rather than invented numbers.

Editorial approach

Contact

General questions can be sent through the form on the home page. The form operates within the browser on this static site and does not transmit messages to a server.