Sustainable & Secure: Timber Construction in Data Centers

Building the Future with Wood and Technology

Data centers are indispensable in 2025—and real power guzzlers. Our digital lifestyle is driving energy demand up. But sustainability doesn't end with efficiency: building materials are also moving into focus. Wood is considered a promising alternative to steel and concrete—but can that really be safe?

Wood as a sustainable alternative

The use of timber construction in data centers is becoming increasingly important. Many large companies are already using Cross-Laminated Timber (CLT), a multi-layer, cross-laminated solid timber product with high load-bearing capacity, to reduce their CO₂ emissions and promote more sustainable construction methods.

A concrete example is Microsoft: With the start of the digital transformation, the corporation has continuously expanded its cloud services around the Azure platform. This development requires more and more data centers—and therefore also considerable amounts of energy. Today it is clear: the growing energy demand of digital infrastructure has become a major obstacle to achieving sustainability goals.

Microsoft has recognized that sustainable IT practices are not only ethically necessary, but also offer competitive advantages. In northern Virginia, the world's largest software company operates a data center that was partially built from CLT.

YEXIO goes one step further here: YEXIO consistently relies on sustainable solid wood construction. With wood used almost entirely for the structure and facade, in principle only the foundation is excluded from the timber construction method. This saves around 600 tons of CO₂ and stores it in the building in the long term. This construction method also improves the indoor climate and speeds up the construction process through modular building. By combining structural efficiency, the use of natural materials, and the option for later recycling, a future-proof standard for data centers is created—ecologically, architecturally, and in the spirit of a sustainable circular economy.

Studies show: using CLT can reduce the carbon footprint by up to 35% compared with steel structures, and by up to 65% compared with concrete.

Wood also stores CO₂ during its growth and binds it long-term in the building fabric, contributing to a positive climate balance. In combination with green facades and roofs as well as innovative rainwater harvesting systems, timber-built data centers can further improve their environmental footprint. These developments are part of a comprehensive green IT strategy that integrates cloud computing, scalable cloud infrastructures, and energy-efficient IT resources.

What is Cross-Laminated Timber (CLT)?

Cross-Laminated Timber (CLT), known as cross-laminated timber, consists of several layers of wood glued together crosswise. In terms of stability and strength, the structure is comparable to concrete or steel—yet significantly lighter. CLT is increasingly used as a sustainable alternative in construction because of its high load-bearing capacity and dimensional stability.

Another advantage: CLT elements are prefabricated and can be quickly assembled on site at the construction site. In combination with modern cloud architectures such as hybrid-cloud data centers and energy-efficient infrastructures, this creates a future-proof approach to sustainable data centers.

Fire protection: challenges and solutions

When there is a fire, wood is often involved. At least in people's minds—the question of fire protection when using timber construction in data center building is therefore more than justified. Data centers house highly sensitive IT infrastructures that are particularly susceptible to damage from smoke and heat.

Modern timber construction methods, however, show that the fire risk is no higher than with conventional materials:

• Fire resistance of CLT: Cross-laminated timber develops a char layer that insulates the wood and increases fire resistance. Tests have shown that load-bearing timber structures can achieve fire resistance of up to 90 minutes.

• Innovative protection technologies: Fire-resistant coatings and impregnations significantly delay the flammability of wood.

• Safety architecture: Modern and highly available data centers are designed so that critical IT systems are housed in separate, specially protected areas. Fire protection systems with sensor-controlled early fire detection and gas-based extinguishing systems minimize the risks.

Fact check: timber construction and fire risk

There are numerous prejudices against timber construction, but recent studies refute many of these assumptions:

• Wood burns more predictably than steel: While steel fails abruptly at high temperatures, CLT's char layer keeps the building's load-bearing capacity intact for longer.

• Lower risk of flame spread: Thanks to precise fabrication and innovative fire protection methods, fire behavior can be controlled in a targeted way.

• Actual causes of fire: Electrical faults and hardware overheating pose a far more common fire risk than the construction materials used. A combination of intelligent monitoring, structured safety concepts, and optimized cabling is crucial to prevent fires.

Conclusion: sustainability and safety in harmony

Timber construction in data centers can easily compete with steel and concrete when it comes to targeted safety measures—but offers a much greater sustainability potential.

Either way—sustainable data centers require more than just energy-efficient hardware and modern cooling systems. What matters is a holistic approach that also takes innovative building materials such as CLT into account.

Companies that adopt such solutions early position themselves as pioneers of a sustainable IT infrastructure that combines environmental friendliness and security.

Technological developments such as hybrid-cloud architectures, open-source solutions, and modern cloud security standards also play a central role. They create the basis for future-proof, GDPR-compliant cloud structures. Supplemented by edge computing, IoT, and AI applications, data processing can be shifted closer to the point of origin—and thus the energy demand can be significantly reduced.

The sustainable transformation of data centers is therefore far more than a trend: it is a key to digital sovereignty and a climate-oriented IT future.