CLT (Cross Laminated Timber)

CLT (Cross Laminated Timber): A Comprehensive Guide to Building with Wood

If you’re looking for a sustainable and cost-effective way to build your next structure, you might want to consider using cross-laminated timber (CLT). In recent years, CLT has emerged as a popular alternative to steel and concrete, offering a variety of benefits over traditional building materials. In this article, we’ll delve into everything you need to know about CLT, how it’s made, its advantages, and how it’s transforming the construction industry.

What is Cross Laminated Timber (CLT)?

Cross Laminated Timber (CLT) is a type of engineered wood that is made by stacking several layers of lumber boards at right angles to one another. The boards are glued together, compressed, and then cut to size. The result is a large, solid panel that can be up to 16 feet wide and 60 feet long. These panels are then used to construct walls, floors, and roofs.

How is CLT Made?

CLT is made by cross-laminating several layers of dried lumber boards. The boards are usually made from softwoods like spruce, pine, or fir, that are typically harvested from sustainably managed forests. The boards are then glued together in a press, creating large panels that are extremely strong and stable. The panels are then cut to size, and all the necessary openings, such as doors and windows, are pre-cut before being transported to the job site.

Advantages of CLT

There are many advantages to using CLT over traditional building materials. Some of the most significant advantages include:

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1) Sustainability: CLT is a renewable resource that is harvested from sustainably managed forests. The use of CLT in construction also helps to reduce carbon emissions, as the wood sequesters carbon throughout its lifespan.

2) Speed of construction: CLT panels can be prefabricated in a factory and then quickly assembled on-site, reducing the time it takes to build a structure. This makes it an ideal choice for projects with tight timelines.

3) Strength and durability: CLT panels are extremely strong and can withstand earthquakes and other natural disasters. In addition, they are also highly resistant to fire.

4) Aesthetics: CLT has a unique look and feel that can add character to a space. It can be left exposed, creating a warm and inviting atmosphere.

5) Cost-effective: CLT is often less expensive than other building materials, making it an attractive choice for many builders.

Applications of CLT

CLT can be used in a variety of applications, including:

1) Residential buildings: CLT is ideal for constructing single and multi-family houses, as it’s quick to assemble and provides excellent insulation.

2) Commercial buildings: CLT can be used to construct offices, schools, and other commercial buildings.

3) Public structures: CLT is suitable for public structures such as bridges, museums, and other community buildings.

FAQs about CLT

1. Is CLT as strong as steel and concrete?

Yes, CLT can be as strong as steel and concrete, and in some cases even stronger. It has been shown to have excellent resistance to earthquakes and is highly durable.

2. Can you use CLT for tall buildings?

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Yes, CLT can be used for tall buildings, but the height limit may vary according to local building codes.

3. Is CLT cheaper than steel and concrete?

In many cases, CLT can be less expensive than steel and concrete, particularly if prefabricated panels are used. Additionally, the speed of construction can save money on labor costs.

4. Is CLT sustainable?

Yes, CLT is a sustainable building material that is made from renewable resources.

5. Is CLT fire-resistant?

Yes, CLT is highly resistant to fire due to the way it’s constructed. The thick, solid panels reduce the spread of flames, making it a safer alternative to other building materials.


Cross Laminated Timber (CLT) is an excellent building material that provides numerous advantages over traditional building materials. It’s sustainable, quick to assemble, and highly resistant to earthquakes and fire. Additionally, it’s often less expensive than steel and concrete, making it an attractive choice for many builders. By using CLT, you can create beautiful and functional structures that are both efficient and environmentally friendly.