Understanding NAFS-08 Building Code Requirements

Over the past two years, each Canadian province, except for Quebec and Alberta, has implemented a new Building Code based on the 2010 National Building Code.

Understanding NAFS-08 Building Code Requirements

Did you know that?

Over the past years, each Canadian province, except for Quebec and Alberta, has implemented a new Building Code based on the 2010 National Building Code?

The new Building Code refers to the new standard (NAFS-08) and the Canadian Supplement (CSA A440S1-09) which relate directly to windows and doors?

That Québec is planning to adopt a new Building Code before the end of the current year?

What does it all mean?

The NAFS-08 (North American Fenestration Standard), also called harmonized standard, is a new standard that combines in a single document several Canadian and U.S. standards that involve entrance doors, sliding doors and windows made ​​of different materials.

What is the impact in our daily lives?

  • Ease trade between Canada and the United States
  • Test results will be stated differently in Canada.
    For example :
    • a.A window will be ranked according to a Category Performance (CP) ranging from CP15 to CP100 (the higher the number, the more efficient the product is).
    • b. Canada retains the same way to express air performance (A1 to A3).
    • c. We abandon the B1 to B7 rating to express water infiltration resistance. Now, the minimum pressure test expressed in Pa is used to deal with water infiltration.
    • d. The C1 to C5 structural test rating is replaced by the positive and negative design pressure calculation also expressed in Pa.
    • e. We will consider product usage (Categories: R-LC-CW-AW)
           i. R for residential
           ii.LC for light commercial (condominium three storeys and up, etc.)
           iii. CW for commercial (schools, hospitals, etc.)
      ​     iv. AW for heavy duty commercial (specified by architects, prisons, etc.)
    • f. We will take into account geographical requirements.
           i. Open terrain: in a field, near a lake, etc.
           ii.Closed terrain: in the city, protected by other buildings or trees, etc.
    • g. It will be required to state the size of the window used for testing. Assemblies will also need to be tested separately.
    • h.It will not be permitted to certify a window that is larger than the one tested. Currently, we can certify a window up to 25% larger than the test.
  • The product labeling (including Category Performance, the size of the sample tested, class, style, positive and negative design pressure, the test pressure for water infiltration, citing the standard to which it refers and the name of the company) will be required to simplify the work of building inspectors.

How to evaluate the performance in a given territory?

A performance calculator has been posted on the Fenestration Canada website at the following link:

We hope this information was helpful to understand the key norm changes. Please do not hesitate to contact your local sales representative for more information.