Preface & Disclaimer


The Guide to Near Net Zero Residential Buildings is published by NAIMA Canada. This guide consolidates information on how builders and designers may achieve the near net zero energy efficiency targets in current and upcoming codes, including the British Columbia Energy Step Code. This guide is intended to be an industry resource for designing and constructing low energy use buildings using mineral fibre insulation without compromising other aspects of building performance including moisture management, airtightness, and durability. This guide is limited to Part 9, wood-frame construction, with a focus on British Columbia, though the principles in this guide may be applied throughout Canada.


This guide is provided for general information only. The greatest care has been taken to confirm the accuracy of the information contained herein. However, the authors, funders, publisher, and other contributors assume no liability for any damage, injury, loss, or expense that may be incurred or suffered as a result of the use of this publication, including products, building techniques, or practices. The views expressed herein do not necessarily represent those of any individual contributor, NAIMA Canada, CertainTeed, Johns Manville, Knauf Insulation, Owens Corning, ROCKWOOL, or the authors RDH Building Science.

Building science, products, and construction practices change and improve over time, and it is advisable to regularly consult up-to-date technical publications on building envelope science, products, and practices rather than relying solely on this publication. Seek specific information on the use of products, the requirements of good design and construction practices, and requirements of the applicable building codes before undertaking a construction project. Consult the manufacturer's instructions for construction products, and also speak with and retain consultants with appropriate engineering or architectural qualifications, and appropriate municipal and other authorities, regarding issues of design and construction practices, including fire protection.

The effective R-value ranges and assemblies illustrated in this guide represent potential strategies to reach high performance targets such as near net zero and the upper steps of the BC Energy Step Code. As with any performance-based energy target, energy modelling should be used to determine appropriate designs for each individual project. Compliance strategies may be impacted by design choices such as form factor, window placement, orientation, mechanical systems, and equipment efficiency.

Produced By:

RDH Building Science Inc.