Automated efficiency takes EnvaTherm® insulated back pans and curtain-wall engineering to a new level. Innovation in foam delivery technology yields soft, even, self-sealing insulation that provides a competitive R-value for consistent, real-world performance. Unlike fibrous insulation, the insulation forms a self-sealing bond to the metal back pan shell so there is no risk of shifting/sagging or convective looping.

EnvaTherm® insulated back pans are used in curtain wall systems in conjunction with opaque glass panels or architectural metal panels for areas that do not require transparent glass.


  • Local & fully certified manufacturing process
  • Fire-tested (CAN/ULC S134) for multi-storey non-combustible construction
  • Pre-& post-consumer recycled content
  • No VOC’s; foam insulation is 100% water-blown
  • Will not sustain mold growth
  • Up to 50% lighter than competing products
  • Lean manufacturing & precision equipment reduces waste & lead times

Coordinating Products

When used in conjunction with SpandrelTherm™ insulated metal spandrel panels, EnvaTherm® insulated back pans help to improve curtain wall performance by up to 38%!

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CADDetails has 2D and 3D models of Lenmak products. Download SKP and RVT files of product panels to test them on your building models!