Insulated Sectional Steel Doors For Efficiency and Strength

insulated sectional steel door

Key Product Features:

  • Polyurethane insulation, R-Value*=14.16
  • Max Width 26’2”
  • 1-3/8” Section Thickness
  • Patented, roll-formed integral struts for rigidity
  • Stucco embossed exterior with pinstriping

Wayne Dalton’s Thermospan® 150 polyurethane insulated sectional steel door provides excellent thermal efficiency. Featuring an R-value of 14.16 (U-value of .0706), the Thermospan 150 is an excellent value when thermal efficiency is important but strength, rigidity and durability can’t be compromised.

The Wayne Dalton Thermospan® Series doors are the only doors in the industry with patented, roll-formed integral struts on each section, making them the most rigid doors available.

IECC® Compliant

The Thermospan® 150 meets IECC® requirements for maximum U-Factor of operable fenestrations (2015 Section C402.4) with a 3rd party certified tested value of less than 0.37. Thermospan® 150 also meets the ASHRAE 90.1 and IECC® requirement for maximum air leakage for fenestration assemblies (2015 Section C402.5.2 Garage doors) with a 3rd party certified tested value of less than 0.40.

Standard Color Options

Pre-painted exterior is factory-finished with baked-on corrosion-resistant primer and a white, brown, gray or tan finish coat.

door color white stucco

door color brown stucco

door color tan stucco

door color tan stucco


Commercial Door Custom Painting

Garage Door Painting

This commercial door model is available with the TruChoice™ Color System, Wayne Dalton’s custom painting process that offers more than 6,000+ colors.

Window Options:

insulated sectional steel door model 150 with one small window
Vision lites allow for visibility while maintaining security
insulated sectional steel door model 220-20 with three full view windows
Aluminum full view sections allow for maximum natural light and visibility

Materials & Construction

door construction of insulated sectional steel door model 150

The Thermospan® 150 is manufactured using our patented, continuous foamed-in-place technology, in which the polyurethane core is securely bonded to hot-dipped galvanized inner and outer skins. This process gives the Thermospan 150 outstanding thermal, strength, and bonding characteristics while creating a door that is significantly more efficient than conventional insulated steel doors. A designed-in joint seal also helps save energy by preventing air filtration. Optional factory glazed windows and aluminum full view panels, combined with three standard finishes (white, brown and tan), help ensure that the Thermospan® 150 meets your aesthetic requirements as well.

The Thermospan® 150 is designed for easy installation, rugged durability and longer life. Features such as 18-gauge steel end caps and two 13⁄4" roll-formed struts on each section give the Thermospan® 150 increased rigidity, while the factory finished interior and exterior hot-dipped, galvanized skins make installation easier, add life to the door and provide greater durability. The Thermospan® 150 also features hardware plates at all fastener points to add durability and extend the life of the door.

*Wayne Dalton uses a calculated door section R-Value for insulated doors.