The pros and cons of building with wood

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By Construction Links 

As reported in The Star, from the outside, the construction project underway at 80 Atlantic Ave. in Liberty Village looks like your typical new office building.

But peer through the large spaces where windows will soon be installed and you’ll notice that above the ground floor there is wood everywhere — walls, ceilings, support beams. Only the underground parking, ground floor and elevator core are concrete and steel.

Designed by Toronto architectural firm Quadrangle, the soon to be completed five-storey office and retail project is a rarity in Toronto — most buildings in the city are still made entirely of concrete and steel.

Like Sidewalk Labs’s proposal to build a high tech neighbourhood in Toronto, with thousands of condominium and apartment units built with timber, the subject of wood buildings is creating a buzz.

Canada already has the world’s tallest wooden building — Tallwood House, an 18-storey student residence at the University of British Columbia — and there are wood structures in Europe and the U.S.

Proponents tout the environmental and esthetic benefits of using the product, but some builders say there are challenges.

“There are many additional things you don’t foresee when you start one of these projects,” said Marc-André Roy, president of Sotramont, a Montreal-based developer that’s one of four partners working on Arbora, a massive mixed-use project made primarily from wood.

“It is much more work,” Roy said in an interview. “We’re doing something new. It took more energy and man hours to get through everything … it’s more complicated.”

The wood used for Arbora is cross-laminated timber (CLT) a product made by gluing wood panels in an angled manner that provides stability and force. The panels are said to be as strong as concrete but five times lighter, making them ideal for floors and load-bearing walls.

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