Timber and Sustainability

Timber is the building material of the future. It is lightweight, safer and easier to use and with the accuracy of the new cutting technologies, it can be assembled in less time with notable cost reductions.

The real benefit of timber is when it is responsibly sourced. Apart from its beauty, timber is a renewable resource which offers a sustainable solution for commercial and private construction projects, paper, fabric, packaging and hygiene alternatives, wood pellets for heating and animal bedding and a plethora of other products to replace many of the current non-degradable products which are adding to our global warming challenges.

Using timber brings a lot of benefits because it is a maintainable resource capable of lasting for all the generations to come. Trees absorb carbon dioxide (CO2) from the atmosphere and then become storage houses for the carbon they collect. The carbon then stays in the timber, even after it’s been transformed into wood-based products. This contributes to a reduction in CO2 emissions and a offers a great alternative to fossil fuels and other non-renewable materials.

At CLOS, we are passionate about sustainable solutions for the future of construction and finding new, energy efficient resolutions for all living, working and recreational environments.

Material Solutions

Cross Laminated Timber (CLT)

Cross Laminated Timber (CLT) is the method of gluing saw-cut timber together to form multiple layers, the boards are laid in opposite directions to increase strength.
The final product can be used to span two directions and is manufactured to the highest levels of accuracy using the latest CNC technology. It is manufactured in a factory-controlled environment and cut to specific sizes and shapes ready to be assembled onsite.

CLT can be used in a variety of combinations as a whole system or as a separate solution for walls, floors, roofing or the core of a building. The speed and accuracy of CLT provides excellent opportunities to increase the safety and efficiency of the construction process and only requires small onsite rigging teams to install it. The time and cost benefits are obvious. All our timber comes from certified, sustainable plantations and ensure the carbon benefits are maximised.

Glued Laminated Timber (GLULAM)

Glued laminated timber is another engineered timber product, comprising layers of dimensional timber bonded together with strong, waterproof structural adhesives. These structural timbers can be cut easily into a variety of shapes and used as vertical columns, horizontal beams and curved, arched forms.

The laminating method allows this timber to be used for much longer spans, heavier loads, and more complex shapes than reinforced concrete or steel; Glulam is one tenth the weight of steel and one sixth the weight of concrete. Glulam can be manufactured to a wide variety of straight and curved configurations, so it offers architects new artistic freedoms without sacrificing structural requirements.

Laminated Veneer Lumber (LVL)

Laminated Veneer Lumber is an engineered timber solution that is manufactured by bonding several veneers together and pressing them under high heat and pressure. Compared with CLT and Glulam, an LVL product is generally used for its structural capacity, but it has a variety of uses depending on its manufactured thickness. It needs to be protected from permanent exposure to weather and is ideally suited to high strength structural applications as beams, columns and roofing sections.


Plywood is a similar veneered timber, made with stacks of alternating layers of veneer sheets glued together and then heated and pressed to create a rigid panel. A thinner version of LVL, it can be used for internal walls, shelving, furniture and other construction applications; its visible grain patterns are a welcome difference to the look of internal walls and furniture.

Nail Laminated Timber (NLT)

NLT is the old original technology for making ply wood by simply nailing it together. It was used to build factories and warehouses over 100 years ago, and it used to be called ‘heavy timber’ or ‘mill decking’.

NLT is a lot cheaper than CLT and it contributes well to the fast build, lower cost, structural advantages and fast procurement benefits of using timber to build both homes and multi-level projects.

Other Materials

We also use a variety of other construction materials like bricks, steel and concrete when they are the best solution for a build.