Canadian National Master Construction Specification


Important information about the Canadian National Master Specification

From 2015 to March 2020, the National Research Council of Canada, with funding support from two departments, has maintained the Canadian National Master Construction Specification (NMS) on behalf of the Government of Canada. While we work to determine future funding, updates and maintenance of the National Master Specification (NMS) are suspended.

We recognize the value of the NMS to Canada's construction sector and governments, and continue discussions with our federal partners about the potential for a continued and enhanced NMS platform. Meantime, you may continue to access the current version of the NMS through our publishers. If you have any questions, please contact us.

The National Master Specification (NMS) is the most comprehensive master specification in Canada, serving as an easy-to-use framework for writing construction project specifications.


NMS overview

View more general information regarding the NMS

Table of contents

View the sections that are found in the NMS


View the latest updates of the NMS, published on a quarterly basis

User's guide

Provides specification writers basic information about using the NMS

Development guide

Provides guidance on how the NMS is developed

Purchase a copy

How to purchase your copy of the NMS through one of our publishers

Frequently asked questions

Answers to commonly asked questions about the NMS

NMS extranet

Federal government access to the NMS sections