Mastering the Art of CLT Building: A Comprehensive Guide


As a pivotal player in the construction sector, we at Johnstone Constructions aim to present a detailed dossier on Cross-Laminated Timber (CLT) building practices. Our discourse revolves around the commendable impact of CLT on the environment and architectural advancement.

What is CLT?

A landmark innovation, Cross-Laminated Timber (CLT) is a wood panel product made from gluing together layers of solid-sawn lumber. Every layer is laterally positioned with their wood grain perpendicular to each other. CLT is extraordinarily sturdy, structural, and encased in wall, floor, and roof elements, becoming an increasingly popular choice in sustainable construction.

Benefits of CLT Building

Eco-Friendliness: CLT buildings have a remarkable carbon footprint. The production of CLT uses less energy than conventional building materials like concrete or steel, thereby reducing CO2 emissions.

High Performance: With a capacity to bear hefty loads, CLT offers a high degree of bending and shear strength. It is also highly resistant to fire damage.

Flexibility: CLT allows for streamlined construction, offering adaptability in design, thus making it favorable for architects.

The Manufacturing Process of CLT

Log Selection: Our technicians meticulously select high-quality spruce logs for the CLT production process.

Curing: The logs are then humidified until they achieve an optimal moisture content.

Lamination: Adjacent layers of spruce are glued with their grain directions perpendicular, under high pressure to shape the CLT panel.

Essential Aspects of Designing with CLT

Fire Resistance: Despite being a timber product, CLT displays impressive fire resistance. The external layer chars to protect the layers beneath, keeping the overall structure intact.

Acoustic Performance: CLT offers natural sound absorption providing effective soundproofing.

Thermal Performance: CLT’s thermal performance strides ahead of traditional building materials, requiring less energy for heating and cooling.

CLT Construction Techniques

Designing and building a CLT structure necessitate careful craftsmanship. By utilizing computer-aided design (CAD) software, we produce detailed panels cut to millimeter precision. This process eradicates onsite modifications, making the building construction more efficient.

CLT Building Regulations

As advocates of best practices, we strictly follow the International Building Code (IBC) and National Design Specification (NDS) for permissible loads and seismic considerations.

Future of CLT Building

With ongoing research, the capabilities of CLT building are anticipated to expand considerably. There is a growing acceptance of CLT in the building industry thanks to its manifold advantages.


Embracing CLT offers a genuinely sustainable construction solution. As proponents of this advanced building method, we aim to integrate and promote this technology for future constructions.

By exploiting the potential of CLT, we can safely conclude that the CLT building industry is set to revolutionize the architectural landscape, bestowing benefits to our environment and generations to come.

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