Energy Series with Intellicore – Model 3720


polyurethane insulated commercial steel doors

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polyurethane insulated commercial steel doors

Climate control, reliability, durability-- our premier, thermally broken, polyurethane insulated steel garage doors have it all, providing excellent temperature control, energy efficiency and long-lasting service for a wide range of applications, such as firehouses, warehouses, and municipal buildings.

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A diagram of a door showing the thick door sections

Panel Design:

(3720  2" thick stucco embossed steel exterior with minor ribbed pattern

Steel Gauge:

(3720) 27 gauge (.016" min) exterior; 28 gauge (.015" min) interior 

Joint Design:

Tongue & groove section with continuous foam thermal break prevents cold or heat from passing through the section

Thermal Conductivity:

R-value 18.4* for maximum energy efficiency

Paint System:

3-stage paint process delivers maintenance free finish that resists rust perforation


(3720 ) Pre-painted snow mist white, commercial brown


Limited Warranty:

10-year paint / 10-year delamination / one-year material & workmanship

Intellicore® doors come with a variety of options to address your building requirements. Options below are not available on all models. See model specific literature or consult a Clopay commercial dealer for option availability.

Door and Window Designs

Modern flush black solid garage doorFlush Panel
Modern grooved black solid garage doorGrooved Panel*
Modern flush black long garage doorFlush With Windows*
Modern grooved black right garage doorGrooved With Windows*
Modern flush black long garage doorFlush with full view long panel windows*
Modern flush black short garage doorFlush panel with short windows*
Modern grooved black long garage doorGrooved With long panel Windows*
Modern grooved black short garage doorGrooved full view with short panel windows*
*Only available with Architectural Series Windows.
Popular contemporary windows configurations


  • Standard White 
  • Glacier White
  • Commerical Tan
  • Chocolate
  • Mocha Brown
  • Charcoal
  • Gray
  • Trinar® White 
  • Trinar® Beige
  • ColorBlast - All models


  • High Cycle Springs (25K, 50K and 100K available)
  • 3" heavy duty track (where not standard)
  • Outside keyed Security Lock
  • Double End Stiles
  • Design pressure rated (WindCode)
  • Impact Rated
  • Photo eyes, sensing edges and Operators
  • Extended 5-Year Hardware Warranty
  • Header (top) and Jamb Seals
  • High Performance Hardware Upgrade


  • Mullions
  • Breakaway Sections
  • Pass Door

An illustration of wall insulation

Intellicore insulation technology
Warmer. Quieter. Stronger.

Commercial doors featuring Intellicore® insulation technology represent the ultimate smart choice. Clopay’s Intellicore® is a proprietary polyurethane foam that is injected into the door, expanding to fill the entire structure. The result is a door with incredible strength and durability. Its dense insulation also produces a quieter door, while its industry-leading R-values (p to 18.4) provide year-round comfort and improved energy efficiency.