Producing a dual cavity

The dual cavity pour and debridge thermal barrier concept is intended to impact the energy savings and increase the condensation resistance of aluminum fenestration products used in the building envelope. A dual cavity with MLP™ (mechanical lock profile) is debridged to eliminate the metal-to-metal contact resulting in a structural composite of aluminum and polymer to create the strongest thermal barrier for aluminum extrusions.

  • wider span opening sizes for increased natural daylighting to reduce the amount of electricity required for artificial lighting
  • decreased demand for fossil fuels necessary to run the core mechanical HVAC systems

See the technical bulletin for producing a dual cavity (PDF 640 KB)

Thermal performance

By adding a second cavity, overall U-factor can improve by as much as 20%, depending on cavity size, cavity location and fenestration type. Interior frame temperatures and higher condensation resistance factor (CRF) are two other performance ratings that will improve with a dual cavity thermal barrier system.


Ultimately, reducing energy consumption in buildings necessitates focusing first on improving performance of the exterior walls—or shell—of a structure, commonly comprised of storefront or curtain wall with large glazing apertures and panel infills. Improving the exterior wall performance might also include interior and exterior sun shading systems and other passive strategies.

Read more about the role of thermal barriers in saving energy.

Contact Azon to quickly assess design criteria or any machinery requirements.