Why Canada Is Building 18-Storey Towers With Wood

How mass timber is moving Canadian construction from conventional lumber to prefabricated structural systems capable of reaching high-rise scale.

Canada has been building with wood for generations.

That part is not surprising.

What is surprising is what happened when engineers stopped treating wood as a material mainly for houses.

In Vancouver, an 18-storey student residence rose to 54 metres using a hybrid structural system built largely around engineered timber.

In British Columbia, Ontario and Quebec, building-code pathways have expanded to allow certain encapsulated mass-timber buildings to reach as high as 18 storeys.

And in 2026, another 18-storey mass-timber project is under construction in North Vancouver.

The question is no longer:

Can Canada build tall with wood?

It already has.

The more important question is:

How did ordinary lumber become a structural system capable of changing what a Canadian tower can be made from?

Canada Already Knew How to Build With Wood

Wood is hardly an experimental material in Canadian construction.

Forests shaped settlement, housing, industry and regional economies long before anyone began discussing mass-timber towers.

Light wood framing became deeply embedded in Canadian residential construction because lumber was available, familiar and compatible with fast construction methods.

But a conventional house frame has obvious limits.

Studs and joists work exceptionally well when the building is small.

As structures grow taller, loads increase, fire requirements become more demanding, floor spans become larger and lateral forces from wind and earthquakes become much more important.

For much of the twentieth century, tall buildings therefore belonged overwhelmingly to two structural materials:

steel and reinforced concrete.

Wood stayed close to the ground.

That division seemed natural until engineers changed the scale of the wood itself.

The broader evolution from traditional timber to engineered construction materials is explored in Home Building Materials Explained: From Timber to Smart Materials.

The Wood Changed Before the Buildings Did

Mass timber is not simply a larger version of the lumber used inside a typical house wall.

It is a family of engineered structural products made by combining smaller pieces of wood into much larger elements.

Two names are especially important.

Cross-Laminated Timber

Cross-laminated timber, or CLT, is produced by arranging layers of lumber in alternating directions and bonding them together into large structural panels.

The result can function as floors, walls or roof elements.

Instead of installing hundreds of small boards individually on site, a project can receive a large panel already manufactured to precise dimensions.

Glulam

Glue-laminated timber, or glulam, bonds layers of wood into structural members capable of acting as columns and beams.

That changes the architectural language of timber.

Wood is no longer limited to closely spaced studs hidden behind drywall.

It can become:

column + beam + floor plate + wall panel.

That is the fundamental shift.

Mass timber takes a material historically associated with small pieces and turns it into a system of large structural components.

A Timber Tower Is Not a Giant Log Cabin

The phrase “wooden skyscraper” can create the wrong mental image.

A modern mass-timber building is not normally a giant stack of logs.

And many of the most important projects are not made exclusively from wood.

They are hybrid structures.

Wood may form floor plates, beams and columns.

Concrete may form foundations or cores.

Steel may appear in connections, reinforcement and specialized structural components.

Each material can be assigned the job it performs best.

This becomes especially clear in Canada's most famous tall-timber experiment.

Brock Commons Was Built to Prove a Point

At the University of British Columbia in Vancouver stands Brock Commons Tallwood House.

The residence opened for occupancy in 2017.

It rises 18 storeys and approximately 54 metres and provides more than 400 student beds.

But its importance goes beyond height.

Brock Commons was built as a demonstration that a tall mass-timber system could be designed, approved, prefabricated and assembled at a scale that might eventually become repeatable.

The building uses a hybrid structure.

A concrete base supports the mass-timber levels above.

Two reinforced-concrete cores contain the stairs and elevators and provide important structural stability.

The timber structure itself relies mainly on CLT floor panels and glue-laminated columns.

This matters because Brock Commons does not present wood as an ideological replacement for every other material.

It presents wood as another structural tool.

The question becomes:

Which material should perform which job?

That is a much more useful question than asking whether timber will somehow eliminate concrete or steel.

Then the Building Arrived in Pieces

Brock Commons also demonstrated something less visible from the finished exterior.

The building was deeply connected to manufacturing.

Its mass-timber components and envelope panels were prefabricated in British Columbia before installation.

That changes the construction process.

A conventional job site often performs enormous amounts of measuring, cutting, fitting and assembly outdoors.

Mass-timber construction can move more of that work into controlled manufacturing environments.

The process begins to resemble:

digital model → factory fabrication → delivery → crane → connection

instead of:

raw material → site cutting → site assembly.

UBC reports that the structure and building envelope at Brock Commons were completed in less than 70 days after prefabricated components began arriving on site.

The installation team also achieved approximately one floor of prefabricated envelope panels per day.

This is where mass timber connects naturally with another transformation already explored by UnfoldBack in How Prefabrication Changed Architecture: From Kit Homes to Modular Buildings.

Mass timber is not necessarily modular construction.

But both ideas challenge the same assumption:

Does everything really have to be manufactured at the final building site?

The Precision Starts Before the Crane Arrives

Prefabrication creates speed only when design decisions are made early enough.

A CLT floor panel can arrive with openings and dimensions already coordinated.

That is efficient when the information is correct.

It can become expensive when changes arrive late.

Architects, structural engineers, mechanical designers, manufacturers, fabricators and contractors therefore need to coordinate before production begins.

The building effectively becomes partly architecture and partly manufacturing data.

This is one reason mass timber belongs as much to the story of digital construction as it does to the story of wood.

The material may come from a forest.

The component reaches the site after passing through an industrial workflow.

Then Everyone Asks the Same Question: What About Fire?

The instinctive objection to a tall wood building is obvious.

Wood burns.

That statement is true.

But building safety is not determined by whether a material can burn in isolation.

It is determined by how an entire assembly behaves under defined fire conditions.

Mass-timber members are much larger than ordinary dimensional lumber, and fire design can account for the behaviour of the timber section as its exposed surface chars.

Canadian codes also use the concept of Encapsulated Mass Timber Construction, or EMTC.

In these systems, mass-timber elements can be protected by fire-resistant materials such as gypsum board for required periods of fire exposure.

Canada's National Research Council has conducted full-scale and intermediate-scale fire research specifically examining encapsulated mass-timber assemblies, including how encapsulation delays timber involvement in a fire and affects charring.

This does not mean mass timber is fireproof.

It means fire performance becomes an engineering and code problem that must be designed, tested and verified.

That distinction is essential.

The Building Code May Matter More Than the Building

An experimental tower can demonstrate that something is technically possible.

That does not automatically make it normal construction.

For a structural system to move from demonstration project to mainstream industry, architects must be able to specify it.

Engineers must be able to calculate it.

Manufacturers must be able to supply it.

Contractors must know how to assemble it.

Building officials must know how to review it.

Insurers and lenders must understand the risk.

And, crucially, building codes must provide a clear pathway for approval.

This is where Canada's mass-timber story becomes much more important than one record-setting building.

Canada Went From 12 Storeys to 18

The National Building Code of Canada 2020 introduced provisions for encapsulated mass-timber construction that enabled certain wood buildings to reach as high as 12 storeys.

That was a major change.

But several provinces kept moving.

British Columbia and Ontario expanded their rules to permit qualifying encapsulated mass-timber buildings as high as 18 storeys.

Ontario's updated provisions took effect with its 2025 code framework and also expanded the types of occupancies where EMTC can be used.

Quebec followed with provisions permitting qualifying EMTC buildings up to 18 storeys beginning in July 2025.

Canada's federal government highlighted those provincial changes in its 2026 reporting on mass-timber development.

That progression matters:

experimental approval → code pathway → repeatable approval.

The headline is not simply that engineers can make an 18-storey timber building stand.

The deeper story is that some Canadian jurisdictions are attempting to make approving one increasingly routine.

Canada Does Not Actually Have One Building Code

There is an important nuance.

The National Building Code is a model code.

Canadian provinces and territories adopt or adapt building regulations within their own jurisdictions.

That means an 18-storey mass-timber provision in British Columbia, Ontario or Quebec should not automatically be interpreted as identical permission everywhere in Canada.

Local adoption, amendments, occupancy, fire protection, structural design and other requirements still matter.

This is why the Canadian mass-timber story is advancing through both national research and provincial experimentation.

The country is not changing one switch.

It is gradually aligning:

research + codes + provincial regulation + construction practice.

British Columbia Had an Obvious Reason to Move First

British Columbia sits at an interesting intersection.

It has a major forest sector.

It has manufacturing expertise.

It has universities researching engineered wood.

It has dense and expensive urban housing markets.

And Vancouver provides a highly visible place to demonstrate new building systems.

Brock Commons therefore made sense as more than an architectural experiment.

It connected local wood resources with advanced manufacturing and urban construction.

That relationship is one reason mass timber has become an industrial question rather than merely an aesthetic trend.

The Wood Ceiling Is Not the Main Reason Canada Cares

Mass-timber buildings photograph beautifully.

Exposed columns and beams produce warm interiors that look dramatically different from concrete and steel.

But architectural appearance is only one part of the Canadian interest.

Mass timber also touches:

forestry
manufacturing
construction productivity
regional employment
prefabrication
housing supply
embodied carbon

Natural Resources Canada identifies mass timber as one pathway for expanding higher-value uses of Canadian wood products while reducing the carbon intensity associated with parts of building construction.

That combination is strategically attractive.

Instead of exporting only relatively low-value raw products, an industry can convert timber into highly engineered building components.

The value moves from:

tree → lumber

toward:

tree → engineered structural system.

Carbon Is Important — but It Is Not a Free Pass

Mass timber is frequently presented as a climate solution.

There are legitimate reasons for that interest.

Wood stores biogenic carbon while it remains in service, and producing some engineered wood products can require less fossil-fuel-intensive processing than producing equivalent quantities of certain conventional materials.

But “wood equals sustainable” is too simplistic.

Environmental performance still depends on:

forest management,
transportation,
manufacturing energy,
adhesives,
building design,
material quantities,
service life,
reuse
and end-of-life decisions.

A badly designed mass-timber building does not become environmentally responsible merely because its columns are wood.

The useful comparison is always the complete building system.

Concrete Is Not Going Away

One of the most misleading ways to describe mass timber is as a coming battle:

wood versus concrete.

Brock Commons itself proves why that framing is weak.

The building uses timber extensively.

It also uses reinforced concrete where concrete makes sense.

Hybrid design may ultimately be one of mass timber's greatest strengths.

A project does not need ideological material purity.

It needs structural efficiency.

Concrete can provide foundations, cores, stiffness, acoustic mass or fire-separated elements.

Timber can provide lighter structural frames, prefabricated panels and columns.

Steel can provide connections, transfer elements and specialized reinforcement.

The future may not be a timber replacement for the conventional tower.

It may be a tower in which architects and engineers become much more selective about where each material belongs.

Being Lighter Changes More Than the Frame

Mass timber can weigh considerably less than an equivalent heavy structural system.

That can affect other parts of the project.

Lighter superstructures can reduce loads carried into foundations.

Smaller components can sometimes be easier to transport and lift.

Construction logistics can change.

But reduced mass also introduces engineering considerations involving vibration, acoustics, connections and building movement.

Again, there is no universal advantage without trade-offs.

Every benefit modifies another part of the engineering problem.

Canada's Next Experiment Is Already Under Construction

Brock Commons showed that 18-storey hybrid mass timber could be built in Vancouver.

But demonstration buildings matter most when something comes after them.

Canada's 2026 Sustainable Development Goals report points to the North Shore Neighbourhood House project in North Vancouver as an example of the newer regulatory environment.

The 18-storey building is under construction and is intended to combine rental housing with community services.

That makes it significant for a different reason.

Brock Commons asked:

Can this be done?

The next generation asks:

Can this become normal enough to solve ordinary building problems?

That is a much harder test.

18 Storeys Is More Than a Number

Why does the height limit matter so much?

Because every increase changes the market where timber can compete.

Four storeys reaches one set of projects.

Six reaches another.

Twelve begins entering a much larger mid-rise category.

Eighteen creates opportunities for dense residential, office and mixed-use development in places where land is expensive.

Once timber can participate in those building types, it is no longer restricted to cabins, houses and low-rise institutional projects.

It enters the conversation about cities.

This connects to the much longer story of structural materials enabling architecture to climb higher, explored in The History of Skyscrapers: From Early Towers to Modern Megastructures.

Steel and reinforced concrete once transformed the achievable height of buildings.

Mass timber is not repeating that history exactly.

It is testing whether another structural family can claim part of the vertical city.

The Hardest Problem May Be Making Mass Timber Boring

Record-breaking buildings attract attention.

But industries are not transformed by projects that remain extraordinary forever.

They are transformed when unusual methods become routine.

Mass timber will matter at scale only when a project no longer requires heroic effort simply because its structure contains wood.

That requires:

repeatable engineering,
predictable costs,
available manufacturing capacity,
experienced contractors,
clear fire requirements,
insurance confidence,
standardized connections,
reliable supply chains
and straightforward permitting.

The future of mass timber depends less on building the next spectacular demonstration tower than on making the tenth, hundredth and thousandth project easier.

In that sense, success may eventually look surprisingly ordinary.

Why Canada Is Building Higher With Wood

Canada's mass-timber movement did not begin because architects suddenly became nostalgic for wooden buildings.

It emerged because several systems started aligning.

Canada already had forests.

It already had a wood-construction tradition.

Engineered products made larger structural components possible.

Digital fabrication made those components increasingly precise.

Prefabrication changed how quickly they could be assembled.

Research addressed structural and fire performance.

Demonstration projects proved that tall hybrid systems could be built.

And building codes began moving the technology closer to normal practice.

The result is not a return to the wooden buildings of the past.

It is almost the opposite.

Canada is taking one of its oldest construction materials and forcing it through one of architecture's newest production systems.

The forest remains part of the story.

But so do factories.

Software.

Fire laboratories.

Building codes.

Cranes.

Urban housing.

And 18-storey towers.

The real question is no longer how high wood can go.

It is whether building tall with wood can become ordinary enough to reshape Canadian construction.

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