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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 ClassicTM is an insulated Carriage House Style steel garage door. The Therma Classic simulates the look of old fashioned swing type doors and available in large selection of attractive designs. The design patterns are a deeper pattern than most steel garage doors, "High Definition". This makes the doors more visible from a distance thus enhancing a homes curb appeal. True arched windows in a variety of window designs are also available. Doors come with a white polyester finish and can be easily field painted to match any homes exterior.


CONSTRUCTION: The Therma Classic 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 with Urethane adhesive, a method of construction that is unparalleled in strength.


  • Section Joint: Tongue and Groove joint between sections with thermal break
  • Thickness: 2"
  • Finish: Baked on polyester enamel
  • Colors selection: White
  • Bottom weather seal: U-shape loop type vinyl with aluminum retainer
  • Limited Lifetime Warranty

STANDARD WIDTHS: 8'-0", 9'-0", 10'-0", 16'-0", 18'-0", 20'-0"
STANDARD HEIGHTS: 7'-0", 8'-0", 9'-0", 10'-0", 12'-0", 14'-0"
Sections available in 27", 28", 31" and 32" in height


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

HARDWARE: 15" or 20" 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.