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Northwest Garage Doors

When it comes to garage doors, Northwest Door® is a leader in innovation and quality. Northwest is a family owned business that began in 1946 installing wooden garage doors. Since 1970 Northwest Door has been an inventive overhead garage door manufacturer catering to the needs of the market place. In 1989 Northwest introduced the Therma Shield, one of the first steel sandwich construction doors which has now evolved into the Therma TechTM line.

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The Therma TechTM line of insulated raised panel steel doors adds to Northwest Door's reputation for quality, value and stylish designs. Two products are available, the Therma TechTM (1-1/2" insulation), Therma Tech IITM (2" insulation). Each model is available in the smooth wood grain panel (Contemporary), a standard raised panel (Traditional) or a longer raised panel the (Ranch). All doors hot dipped galvanized and prepainted, with four colors available, Bright White, Almond, Sandstone and Brown. Choose from a selection of 8 window designs.


CONSTRUCTION: The Therma Tech line is made from hot dipped galvanized wood grain textured steel skins that are embossed with raised panel designs then sandwiched with a polystyrene core. This type of construction forms a thermal barrier between front and back of door. 20 Ga. steel backer plates are toggle locked to the inside of the back skin prior to assembly. Exterior skins are secured to a polystyrene core Urethane adhesive, a method of construction that is unparalleled in strength.


  • Section Joint: Tongue and Groove joint between sections with thermal break
  • Therma Tech, 1-1/2" thickness, R=7.2 (Models 118, 128)
  • Therma Tech II, 2" thickness, R=9 (Models 218, 228)
  • Contemporary Flush Wood Grain (Models 108, 208)
  • Traditional Panel size: 20"x14" (Models 118, 218)
  • Ranch Panel size: 42"x15" (Models 128, 228)
  • Finish: Baked on polyester enamel
  • Colors selection: White, Brown, Almond, Sandstone
  • Bottom weather seal: U-shape loop type vinyl with adjustable aluminum retainer
  • Limited Lifetime Warranty
STANDARD WIDTHS: 8'-0" 9'-0" 10'-0" 12'-0" 14'-0" 15'-0" 16'-0" 18'-0" 20'-0"
Traditional Panels 4 4 5 6 7 8 8 8 10
Ranch Panels 2 2 2 3 3 4 4 4 4

Standard Heights: 7'-0" 8'-0" 9'-0" 10'-0" 11'-0" 12'-0" 14'-0"
Sections 4-21" 3-18",2-21" 6-18" 2-18",4-21" 5-21" 1-18",6-21" 8-21"


  • Widths up to 20', heights up to 14', in one inch increments
  • 8 Window Designs, see "Design Page"
  • 1/8" clear annealed glass standard, clear obscure and insulated glass optional
  • 25,000, 50,000 & 100,000 cycle torsion springs
  • Low clearance, high lift or vertical lift track and hardware also available

HARDWARE: 15" or 12" radius torsion hardware; track is 2" bracket mounted. Quiet long life nylon rollers, non corrosive door fixtures and graduated hinges are standard. U-shaped galvanized struts are supplied with every double car door to keep the door rigid. All doors meet or exceed 12.4/70 MPH wind load per ANSI/DASMA 102-1996.