Why Glulam Is a Low-Carbon Choice for Modern Construction

Glulam for Low-Carbon Construction in India

For a long time, steel and concrete were the obvious choices for structural construction. Timber was often used for finishes, interiors or smaller structures, but rarely considered when the project involved large spans or serious structural loads.

That is changing.

Glue-laminated timber, better known as Glulam, is being used for beams, columns, roofs and large-span structures across residential, hospitality, commercial and public projects. The reason is not only its appearance. Glulam combines structural performance with a lower-carbon material profile, efficient use of timber and the ability to create large structural members from smaller pieces of wood.

For architects looking at ways to reduce the environmental impact of a project without compromising on structural possibilities, that combination is becoming increasingly relevant.

At Artius, we manufacture Glulam using Canadian Douglas Fir, engineered for structural applications in India. Here are some of the reasons Glulam is gaining attention as a material for low-carbon construction.

The embodied carbon difference matters

One of the strongest arguments for engineered timber is its relatively low embodied carbon compared with conventional structural materials.

A 2026 study from researchers at Imperial College London and other institutions reviewed data for emerging structural materials. In its beam case study, engineered wood products including Glulam and cross-laminated timber had cradle-to-gate embodied carbon values equivalent to around 3–5% of primary steel. Importantly, this comparison excludes the carbon stored in the wood, so the figure should be understood as a material-production comparison rather than a universal whole-building carbon saving.

Further reading: Wood Central – Timber's embodied carbon is 97% less than steel, according to LCA databases

This is where timber is different from materials such as steel and concrete.

Trees absorb carbon dioxide as they grow and store carbon in their biomass. When responsibly sourced timber is converted into a long-life structural product such as Glulam, a portion of that biogenic carbon remains stored in the building for as long as the timber remains in service.

The exact amount of carbon stored depends on the timber species, density, moisture content and accounting method, so it is better to use project-specific data rather than one universal number.

For architects and clients, the bigger point is simple: Glulam can reduce the emissions associated with producing the structural frame while also keeping biogenic carbon stored in the timber.

That makes it an important material to consider when reducing embodied carbon in a building.

Further reading: Ecochain – Timber carbon footprint and embodied carbon

Glulam makes better use of timber

A large solid timber beam depends on finding a tree that naturally provides the required size, strength and quality.

Glulam works differently.

Instead of relying on one large piece of timber, smaller timber laminations are graded, prepared and bonded together to create a structural member designed for a specific application.

This gives manufacturers much greater control over the final beam or column. The dimensions can be engineered according to the span, loading and structural requirements rather than being limited by the natural size of a single log.

It also means timber can be used more efficiently.

At Artius, Canadian Douglas Fir is engineered into Glulam members for structural applications. Douglas Fir is widely used for structural timber because of its strength-to-weight characteristics and suitability for engineered wood products.

The result is not simply a larger piece of wood. It is a structural product designed around the requirements of the building.

Large spans are possible without making the structure unnecessarily heavy

One of the reasons architects are looking at Glulam for larger projects is its strength-to-weight ratio.

Glulam can be manufactured into long beams, columns, portals and curved structural forms while remaining significantly lighter than comparable concrete elements.

That lower weight can have practical benefits during construction. Depending on the structural design and site conditions, lighter structural members can mean easier transportation and handling, faster installation and potentially reduced foundation requirements.

For projects where construction time, site access or foundation loads are important considerations, these factors can make a difference.

It also opens up design possibilities.

Large open spaces, vaulted roofs, exposed structural frames and long spans can be achieved without filling the building with heavy structural elements.

Fire performance is a matter of engineering, not assumption

Fire is one of the first questions architects and clients often ask when timber is proposed as a structural material.

The important distinction is between ordinary thin timber products and large-section structural timber such as Glulam.

When exposed to fire, the outer surface of a large timber member chars. That char layer acts as an insulating barrier and slows the rate at which heat reaches the uncharred timber below.

A commonly used design value for the charring rate of Glulam under standard fire exposure is around 0.65 mm per minute, although the applicable value depends on the product, exposure conditions, detailing and relevant design standards.

Further reading: CleanTechnica – Mass Timber Fire Safety: What the Evidence Shows

This predictable behaviour allows engineers to account for the loss of the outer section when designing a timber member for fire resistance.

That does not mean every Glulam structure is automatically fire-safe or achieves a particular fire rating. Fire resistance must be designed, detailed and verified for the specific building in accordance with the applicable codes and test requirements.

The important point is that fire performance is an engineering consideration — not a reason to rule out structural timber at the start of the design process.

Timber can contribute to better building performance

Timber has lower thermal conductivity than steel and concrete, but the thermal performance of a building cannot be judged from the structural material alone.

The envelope, glazing, insulation, junctions and overall building design have a much larger influence on operational energy performance.

Glulam's contribution is therefore best understood as part of a wider building strategy rather than as a standalone energy-saving solution.

This distinction is important when discussing sustainable construction. A genuinely low-carbon building needs to consider both embodied carbon and operational energy, along with material sourcing, construction methods and the building's expected life.

End-of-life planning matters

The sustainability story of timber does not end when construction is complete.

A well-designed Glulam member can potentially be dismantled and reused, depending on its condition, connections and future structural requirements. If direct reuse is not possible, timber can also be processed into other wood products or used for energy recovery where appropriate.

The exact end-of-life outcome depends on the project, connection details, contamination, coatings and local recovery infrastructure. So circularity should be designed into the building rather than assumed.

This is also why whole-life carbon assessments are important. The environmental advantage of timber can vary depending on what happens to the material at the end of the building's life and how the assessment accounts for reuse, recycling, storage and energy recovery.

Further reading: ScienceDirect – Whole-life carbon assessment of timber and conventional structural systems

Glulam is already being used for large-span structures in India

Glulam is not limited to villas, interiors or small architectural features.

At Umbergaon, Gujarat, Artius delivered an 18-metre clear-span Glulam structure using Canadian Douglas Fir laminations. The project demonstrates how engineered timber can be used for substantial structural spans in the Indian context.

The structure was engineered and manufactured in India, showing that Glulam can move beyond being a niche architectural material and become a practical structural option for larger projects.

Project reference: 18-Metre Glulam Structure in India – Artius

For Indian architects, this is an important shift.

The question is no longer simply whether timber can look good in a building. The more relevant question is where engineered timber can make structural, architectural and environmental sense.

What does this mean for architects?

Glulam is not a replacement for steel or concrete in every project.

There will always be situations where conventional structural materials are the right choice. The environmental performance of any building depends on the complete design, material sourcing, transportation, construction process, operation and end-of-life strategy.

But Glulam offers architects another structural option — one that combines engineered performance with the inherent benefits of a renewable bio-based material.

Its advantages can add up across a project:

• Lower embodied carbon potential

• Carbon stored in the timber during its service life

• Efficient use of timber through engineered laminations

• High strength-to-weight performance

• Capability for long-span structural applications

• Predictable fire behaviour when properly designed

• Prefabrication and faster on-site installation

• Potential for reuse and recovery at the end of a building's life

For India, where the conversation around sustainable construction is moving from materials and finishes towards the carbon impact of the entire building, engineered timber deserves a closer look.

Glulam is not simply about bringing wood back into architecture. It is about using timber as an engineered structural material.

And as more architects, developers and engineers become familiar with mass timber and Glulam construction, the conversation is gradually moving from “Can we build this in timber?” to a more useful question:

“Where does timber make the most sense for this project?”

Thinking about Glulam for your next project?

At Artius, we work with architects, designers and project teams to develop engineered timber solutions for residential, hospitality and commercial applications.

From structural beams and columns to large-span Glulam systems, the right solution starts with understanding the span, loads, site conditions, detailing and performance requirements of the project.

Talk to the Artius team about your next Glulam or mass timber project.

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Frequently Asked Questions

What is Glulam?

Glulam, or glue-laminated timber, is an engineered wood product made by bonding multiple timber laminations together to create structural beams, columns and other members. It can be manufactured to specific dimensions and structural requirements.

Is Glulam a low-carbon building material?

Glulam can have a significantly lower embodied carbon footprint than conventional structural materials, depending on the timber source, manufacturing process, transportation and carbon accounting methodology. Timber also stores biogenic carbon during its service life.

Is Glulam suitable for large-span structures?

Yes. Glulam can be engineered into long beams, columns, portals and curved structural members, making it suitable for large-span applications in residential, hospitality, commercial and other building types.

Is Glulam fire resistant?

Large-section Glulam behaves differently from thin timber products when exposed to fire. Its surface chars at a relatively predictable rate, allowing engineers to account for the charred section when designing for fire resistance. The required fire performance must be established through project-specific engineering, detailing and applicable codes.

Can Glulam be used in India?

Yes. Glulam can be designed and manufactured for projects in India, provided the material, connections, structural design, detailing and protection are appropriate for the project's location and environmental conditions.

Is Glulam stronger than conventional timber?

Glulam is an engineered structural product rather than simply a larger piece of solid timber. Its laminations are selected and bonded to create members with predictable dimensions and structural properties, allowing it to be manufactured for specific loads and spans.

What is the difference between Glulam and mass timber?

Mass timber is a broader category that includes several engineered timber products. Glulam is one type of mass timber product, primarily used for beams, columns, arches and other structural members.

Can Glulam be reused?

Potentially, yes. Glulam members can sometimes be dismantled and reused, depending on their condition, connections, dimensions and future structural requirements. Designing buildings for disassembly can improve the possibility of future reuse.

About Artius

Artius is an Indian engineered timber company specialising in Glulam and mass timber solutions for residential, hospitality and commercial architecture. The company designs, manufactures and installs engineered timber structures for projects across India.