Don’t Let Your Cold Tank System Bleed Energy: The Hidden Threat of Thermal Bridging

When it comes to cold storage tanks, maintaining consistent temperatures isn’t just about efficiency—it’s about protecting your bottom line and ensuring product integrity. Yet many facility managers overlook one of the most significant threats to their system’s performance: thermal bridging. The overall electricity cost impact from thermal bridging in supermarket cold storage rooms can be thousands of dollars per year. Understanding how to identify and eliminate these heat transfer problems can dramatically reduce your operating costs while improving system reliability.

What Exactly Is Thermal Bridging?

A thermal bridge, also called a cold bridge, heat bridge, or thermal bypass, is an area or component of an object which has higher thermal conductivity than the surrounding materials, creating a path of least resistance for heat transfer. In cold tank systems, this phenomenon occurs when structural elements like metal supports, brackets, or poorly designed insulation systems create direct pathways for heat to bypass your insulation and infiltrate the cold storage environment.

Using a cold storage structural insulated wall panel as an example, the perimeter frame thermal bridge will cause the inside surface temperature of the wall panel in the vicinity of the frame to have a higher temperature than the surrounding polyurethane foam. In an equal but opposite scenario, the same thermal bridge will cause the outside temperature in the vicinity of the frame to have a lower temperature than the surrounding polyurethane insulation.

The Real Cost of Thermal Bridging in Cold Storage

The impact of thermal bridging extends far beyond simple energy waste. The increased inside surface temperature at the thermal bridge will add heat into the cold storage environment that the refrigeration system must remove to hold the set point temperature. Meaning the refrigeration must run longer to remove the additional heat. This uses more electricity and increases monthly electricity bills.

Beyond operational costs, thermal bridging creates additional problems that can compromise your entire system:

• Another issue thermal bridging can create is condensation and ice build-up on cold storage building surfaces. Condensation and icing can occur on the outside of the cold storage structure where the surface temperature has been lowered due to the thermal bridging.
• Condensation on the walk-in cooler and freezer building surfaces can cause mold development and slippery floors where human health and safety is put at risk.
• Structural integrity issues from repeated freeze-thaw cycles
• Increased maintenance requirements and system downtime

Common Thermal Bridge Locations in Cold Tank Systems

Identifying thermal bridges requires understanding where they typically occur. Thermal bridges can occur at several locations within a building envelope; most commonly, they occur at junctions between two or more building elements. Common locations include: Floor-to-wall or balcony-to-wall junctions, including slab-on-grade and concrete balconies or outdoor patios that extend the floor slab through the building envelope · Roof/ceiling-to-wall junctions, especially where full ceiling insulation depths may not be achieved … Wood, steel or concrete members, such as studs and joists, incorporated in exterior wall, ceiling, or roof construction

In tank systems specifically, watch for thermal bridges at:

• Tank support structures and mounting brackets
• Pipe penetrations and fittings
• Access hatches and maintenance openings
• Seams between insulation panels
• Areas where different insulation materials meet

Professional Detection Methods

Surface temperature data in 3D models can identify and measure thermal irregularities of thermal bridges and insulation leaks. Thermal imaging can also be acquired through the use of unmanned aerial vehicles (UAV), fusing thermal data from multiple cameras and platforms. Professional thermal imaging surveys represent the gold standard for identifying thermal bridges in cold tank systems.

Refrigeration – Inspectors can use a FLIR thermal imaging cameras to find defects in refrigeration and cool room insulation. These sophisticated tools can detect even minor temperature variations that indicate thermal bridging, allowing for precise identification of problem areas before they become costly failures.

Infrared scanning allows energy assessors to check the effectiveness of insulation in a building’s construction. The resulting thermograms help assessors determine whether a building needs insulation and where in the building it should go.

Eliminating Thermal Bridges: Solutions That Work

The most effective approach to thermal bridging is prevention through proper design and material selection. The best way to prevent thermal bridging in cold storage buildings constructed of structural insulated panels is selecting the correct materials. Selecting an insulation and frame material that meets both the structural and insulation requirements is the best solution to reducing thermal bridging.

For existing systems experiencing thermal bridging issues, several remediation strategies prove effective:

• There are three cost-effective ways to repair them. Add the missing thermal break, install insulated battens, and add a heat trace. Where possible adding a missing thermal break is the best option to repair a thermal bridge in an existing structure.
• Installing continuous insulation systems that eliminate gaps
• Using advanced insulation materials with superior thermal performance
• Implementing proper vapor barriers to prevent moisture-related issues

When selecting professional cold tank insulation services, partnering with experienced specialists makes all the difference. Companies like Vertarib, based in Jericho, New York, bring over 40 years of expertise to cold storage tank applications. At Vertarib we are committed to delivering the highest quality most reliable tank insulation systems. To that end, we partner with the most acclaimed engineers and designers in the world. This collaboration has allowed us to design and develop high-efficiency tank insulation systems complete with the most advanced vapor barriers and state-of-the-art panel designs that can function in temperatures as low as -50° F.

The Advanced Materials Solution

Modern insulation technology offers significant advantages over traditional materials. Because of their high compression strength and weight, ISOVER stone wool tank roof slabs do not require any additional fixing or support structure, thus substantially reducing the opportunities for thermal bridging. They avoid the need for additional support structures and therefore eliminate unnecessary thermal bridges.

High-performance materials like polyurethane foam systems provide exceptional thermal resistance while minimizing thermal bridging opportunities. KPS Global structural insulated panel systems are manufactured with a high R-Value insulating foam called polyurethane. The closed-cell foam is injected into an empty shell comprised of two metal skins and perimeter frame components · A blowing agent blended into the polyurethane foam turns the rigid polyurethane plastic into a high-performing insulation. The blowing agent creates millions of tiny gas-filled cells in each cubic inch of the foam which is highly effective in slowing down thermal energy transfer. The polyurethane foam blowing agent is the reason why polyurethane insulation has the highest R-value of any building insulation.

Taking Action: Your Next Steps

Thermal bridging in cold tank systems represents a serious but solvable challenge. The key lies in early detection, proper material selection, and professional installation. Whether you’re designing a new system or retrofitting an existing one, addressing thermal bridging should be a priority consideration.

Start by conducting a comprehensive thermal assessment of your current system. Professional thermal imaging can reveal hidden problems that might be costing you thousands annually. Then, work with experienced insulation specialists who understand the unique challenges of cold storage applications and can recommend solutions tailored to your specific operational requirements.

Remember, investing in proper thermal bridge elimination isn’t just about reducing energy costs—it’s about ensuring system reliability, protecting product integrity, and maintaining safe working conditions. In the competitive world of cold storage, every efficiency gain matters, and eliminating thermal bridging represents one of the most impactful improvements you can make.