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Research Partnerships & Innovation

École Heritage Immersion – Construction Airtightness Testing

October 14, 2016

In 2014/15 the École Heritage Immersion School in St Pierre-Jolys, Manitoba, underwent a major building envelope upgrade including complete removal and replacement of the west and north exterior walls plus the courtyard area.

Services Provided

  • As part of this work, BETAC conducted a pre-retrofit test on the building in 2013 to quantify its air leakage characteristics and to identify significant air leakage sources on the building envelope.
  • Following the retrofit, a second test was performed in 2016, allowing the impact of the test to be assessed.


  • The retrofit was able to reduce the measured air leakage of the building by over one-third, depending on the metric.
  • The Equivalent Leakage Area (ELA10) was reduced by 34%, or 0.39 m2(4.2 ft2).

The Public Schools Finance Board has expressed interest in collaborating with BETAC to further these research activities as they apply to schools around the province.