Three years ago, the Ontario Building Code required that any developer taking on a mid-rise wood-frame building had to construct stairwells out of non-combustible material. That was expensive. It made construction challenging, and, according to the Canadian Wood Council, resulted in a lower adoption of wood-frame building. Since that requirement was removed in 2023, allowing full buildings to be constructed with wood, interest in mid-rise wood-frame building has increased considerably, especially for residential builds, said Hailey Quiquero, with the WoodWorks Ontario program, an initiative of the Canadian Wood Council. “Now, in our market, we’re sitting at around 50% of five- and six-storey buildings being built out of wood construction, so a great jump,” Quiquero said. “We’ve still got a long way to go. In BC, I think it’s greater than 80% of this market.” …Currently in Ontario, mid-rise wood-frame building is largely being used in residential projects, Quiquero said.