How Nystrom Expansion Joint Systems Support Data Centers
In this article:
Why Data Centers Demand Advanced Expansion Joint Solutions
Data centers are the backbone of modern digital infrastructure. They power cloud computing, artificial intelligence, banking and enterprise applications that keep businesses and consumers connected. As demand for data processing continues to rise, construction of these mission-critical facilities has expanded rapidly—bringing a new level of technical sophistication.
One area experiencing major evolution is the expansion joint system. While expansion joints often operate quietly in the background, they play a crucial role in the long-term performance of data centers. These buildings must stay operational 24/7, and even minor structural issues—movement, air leakage, fire transfer, or water intrusion—can cause costly downtime. For that reason, data centers require expansion joint solutions that are stronger, more integrated and more reliable than those used in typical commercial facilities.
At Nystrom, we’re proud to support data center construction across the United States, including major projects such as the Micron facility in Boise, Idaho. Our work in this space highlights a simple truth: when it comes to protecting mission-critical operations, the right expansion joint system can be as important as any piece of equipment inside the building.
Why Expansion Joints Matter in Data Centers
Data centers operate under strict uptime requirements. Even minor failures can cause costly downtime. Expansion joints help by:
- Absorbing movement from thermal changes, seismic activity and settlement.
- Maintaining envelope integrity to prevent water infiltration and air leakage.
- Ensuring fire protection with UL-rated systems that block flames and smoke.
- Supporting heavy loads on floors with constant rolling traffic.
Nystrom Solutions for Mission Critical Facilities
Heavy Duty Floor Joint Covers
Inside a data center, movement is constant. Heavy server racks are rolled from one location to another, technicians move equipment across long corridors and facilities operate around the clock. These are not quiet office floors—they behave more like hybrid industrial environments. That constant activity places tremendous demands on floor expansion joint covers. They must support heavy loads, allow equipment to glide smoothly from one surface to another and stand up to years of high-frequency use. Nystrom heavy-duty floor systems are built with these conditions in mind. Their reinforced designs, thicker metals, and flush profiles reduce vibration, protect sensitive electronics and provide a long service life. When unusual slab conditions or tight construction schedules arise, Nystrom also supplies custom-fabricated surface-mounted plates.
Wall and Ceiling Transitions
Maintaining a continuous seal across walls and ceilings is essential for energy efficiency and environmental control. Climate control inside a data center is critical because servers generate enormous heat, and even small changes in interior conditions can affect performance. Expansion joints must not interrupt the continuity of air and vapor barriers. Nystrom wall and ceiling expansion joints provide watertight and airtight seals, compatibility with multiple substrates and solutions for seismic and thermal movement. Pre-compressed foam seals and hybrid systems help maintain enclosure integrity by preventing unwanted air leakage or condensation while still allowing the building to move naturally.
Roof Integration with TPO, KEE, and PVC Membranes
The roof of a data center carries a heavy burden. It supports mechanical equipment, faces wide temperature swings and contends with weather exposure year-round. Expansion joints in this part of the structure must remain watertight while still absorbing large movements. Nystrom roof expansion joint covers integrate directly with today’s most widely specified roofing membranes:
- TPO (Thermoplastic Polyolefin) is a single-ply roofing membrane known for energy efficiency and heat-reflective properties.
- KEE (Ketone Ethylene Ester) offers superior chemical resistance and flexibility.
- PVC (Polyvinyl Chloride) provides excellent fire resistance and long-term durability.
Whether the project calls for flexible bellows, fire-rated foam transitions, or complex roof-to-wall conditions, Nystrom systems protect the most vulnerable part of the building envelope.
Fire Safety Without Compromise
Fire protection is one of the most regulated aspects of any data center. With dense electrical equipment and high-value data, these buildings must prevent the spread of flames and smoke under all conditions. Expansion joints, often running continuously through multiple floors and walls, must maintain this fire separation even while accommodating building movement. Nystrom fire-rated foam systems meet this requirement through UL-listed materials that seal the joint while still allowing full movement. Unlike traditional mineral-wool blankets, they do not require complex mechanical attachments and provide a far more reliable long-term solution. This is one reason these systems are increasingly becoming the standard choice for mission-critical environments.
Nystrom expansion joint systems are tested in accordance with:
- UL 2079 and CAN ULC S-115 “FTH” (FTH: Rating Fire, Temperature and Hose)
- ASTM E119, E1399, E1966
- BS EN 1366.4
A Growing Market with Long-Term Opportunity
Industry forecasts show that data center construction will continue to grow well into the next decade. Commercial starts are expected to rise significantly in 2025, driven largely by the demand for digital infrastructure and the facilities that support it. Analysts predict that commercial construction will approach $247 billion by 2030, with data centers remaining a key contributor even as other sectors experience slowdowns. For contractors—whether they focus on roofing, building envelope, waterproofing, interiors or specialty expansion joint installation—this trend represents a sustained opportunity. The technical complexity of these buildings calls for partners with the experience and product depth to deliver performance that lasts.
Best Practices for Specifying Expansion Joints
Plan early and coordinate expansion joint placement during design. Account for movement types including thermal, seismic, and wind-induced. Integrate with envelope systems to ensure compatibility with roofing and waterproofing. Specify fire-rated solutions that meet UL 2079 and ASTM standards. Choose durable materials such as corrosion-resistant metals and UV-stable elastomers. Detail transitions for roof-to-wall, wall-to-ceiling, and floor-to-wall interfaces. Plan for maintenance by selecting systems with replaceable wear components and accessible inspection paths. Need further help specifying your next expansion joint project? Connect with a Nystrom Specialist today.
FAQs
Why do data centers need expansion joints?
They accommodate structural movement caused by temperature changes, seismic activity, and settlement, preventing cracks and leaks.
What types of expansion joints does Nystrom offer for data centers?
Floor, wall, ceiling, roof and fire-rated systems—all designed to work in data center environments.
How do Nystrom fire-rated expansion joints work?
They use advanced materials to block flames and smoke while allowing movement, tested to UL and ASTM standards.
Nystrom expansion joint systems are tested in accordance with:
- UL 2079 and CAN ULC S-115 “FTH” (FTH: Rating Fire, Temperature and Hose)
- ASTM E119, E1399, E1966
- BS EN 1366.4
Can Nystrom roof joints integrate with TPO, KEE, and PVC membranes?
Yes. Our roof systems provide watertight transitions and flexibility for single-ply membranes.
Where can I find Nystrom expansion joint solutions?
Visit Nystrom Expansion Joint Systems for a full range of solutions.
The Nystrom Advantage
As data centers continue to expand, the importance of robust expansion joint systems cannot be overstated. Nystrom delivers reliable expansion joint solutions that safeguard structural integrity, ensure fire safety and maintain environmental control—key factors in achieving the uptime and reliability that modern digital infrastructure demands. For design teams and contractors working in this rapidly expanding market, Nystrom offers the expertise, products, and support needed to deliver long-term results on mission-critical projects.
Ready to specify expansion joints for your next data center project? Contact Nystrom or visit our website for technical assistance and product details.
