If your building's energy performance doesn't match its design specifications, occupants report cold spots near exterior walls, or you're finding condensation on interior surfaces at specific locations — thermal bridging in buildings may be the root cause. Thermal bridges occur when conductive building materials — typically steel structural members, concrete slabs, or aluminum window frames — create pathways for heat to bypass the insulation system entirely.
At shelf angles, balcony connections, parapet caps, and structural penetrations through insulated assemblies, these thermal bridges can reduce the effective R-value of the wall assembly by 30% or more compared to the clear-field insulation value. The result is localized cold spots on interior surfaces, concentrated condensation risk, energy performance that falls far short of code compliance targets, and rising energy costs that no amount of HVAC optimization can resolve.
ACE Building Envelope Design's thermal performance analysis calculates effective U-values that account for thermal bridging — revealing the actual thermal performance of your wall assemblies. Our infrared thermography visualizes thermal bridges in real time, documenting exactly where heat loss concentrates. And our continuous insulation design strategies mitigate thermal bridges at their source.
Where Thermal Bridges Form and Why They Matter
Thermal bridges form wherever a conductive material penetrates or bypasses the insulation layer. The most significant thermal bridges in commercial construction occur at steel shelf angles that support exterior cladding, concrete balcony slabs that extend through the insulation plane, steel stud framing within insulated wall cavities, aluminum window and curtain wall frames that span from exterior to interior, and parapet caps where the roof insulation terminates.
Each of these conditions creates a localized zone of dramatically reduced thermal resistance. On a cold winter day, the interior surface temperature at a shelf angle thermal bridge can be 15-20°F colder than the surrounding wall surface. This temperature depression creates condensation conditions that can produce mold growth at the bridge location — even in buildings with no water intrusion.
Energy Code Implications of Unmitigated Thermal Bridging
Modern energy codes increasingly require continuous insulation that effectively addresses thermal bridging. A wall assembly that meets prescriptive R-value requirements using cavity insulation alone may fail to meet the code's effective U-value requirements when thermal bridges at structural connections are properly accounted for.
ACE's thermal performance analysis calculates effective U-values that include the impact of every thermal bridge in the assembly — shelf angles, clip connections, fenestration frames, and structural penetrations. This analysis often reveals that buildings designed with code-minimum insulation are actually underperforming their energy code requirements by 20-40% when thermal bridging is properly calculated.
What You're Facing
Cold interior surfaces, condensation at specific wall locations, energy performance below design targets, or code compliance concerns related to effective thermal performance.
How We Address It
ACE calculates effective U-values accounting for every thermal bridge, visualizes heat loss with infrared thermography, and designs continuous insulation solutions.
What You Get
Quantified thermal performance data, identified bridge locations and severity, targeted mitigation designs, and verified performance closing the gap.
Concerned About Your Building's Thermal Performance?
Tell us about your project and we'll explain how thermal bridging analysis can identify and resolve the hidden energy losses in your envelope.
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Diagnostic Methods for Identifying Thermal Bridges
Infrared thermography is the primary diagnostic tool for visualizing thermal bridges in existing buildings. ACE deploys both handheld and drone-mounted IR cameras to survey building facades, identifying thermal anomalies that indicate heat loss concentrations. Thermographic surveys performed during cold weather conditions reveal the exact locations and relative severity of thermal bridges across the entire building exterior.
For new construction, ACE's thermal performance analysis identifies thermal bridge locations during the design phase — before they're built into the building. This proactive approach allows mitigation strategies to be incorporated into the design rather than remediated after construction. Our accredited testing capability means we can verify actual thermal performance against modeled predictions after the building is complete.
Continuous Insulation and Thermal Break Design Solutions
Continuous insulation (CI) systems are the primary solution for thermal bridging because they place the insulation layer outboard of the structural frame — creating a thermal blanket that isn't interrupted by framing members. ACE's CI designs specify appropriate insulation materials, attachment systems, and cladding support strategies that maintain the continuous thermal layer through all conditions.
At locations where structural penetrations must pass through the insulation plane — shelf angles, balcony connections, canopy supports — ACE specifies thermal break details that minimize the conductive pathway. These include proprietary thermal break assemblies, structural thermal isolators, and design strategies that reduce the cross-sectional area of conductive penetrations.
Related Problems Pages
Frequently Asked Questions
Heat bypassing insulation through conductive materials — steel, concrete, aluminum — at structural connections and penetrations.
30% or more at common locations like shelf angles and balcony connections. Unmitigated, it can reduce whole-wall performance by 20-40%.
Yes — cold interior surfaces at bridge locations create conditions for condensation and mold growth.
Infrared thermography visualizes heat loss patterns. Thermal performance analysis calculates effective U-values accounting for all bridges.
Continuous insulation, thermal break assemblies, structural isolators, and design strategies that minimize conductive penetrations.