Northwest Doors - Therma Series Residential Doors Parts and Services

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Therma Series

The Therma Series Commercial/Industrial insulated steel garage doors are rugged and beautiful. They are designed to have a sleek and appealing appearance with great weather resistance. Therma Series doors are made with a sandwich type construction, steel outer skins are formed and then pressure bonded to a polystyrene core giving the door maximum strength, a natural Therma Break and superior insulating efficiencies. Three insulating values are available - R10.4, R12, and R16.

Warranty (104kb)


The Therma Series doors offers 3 different models all are made from hot dipped galvanized (G 40) wood grain textured steel skins that are sandwiched with a polystyrene core. This type of construction forms a natural thermal barrier between front and back of door. 20 gauge 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. R16*, R12* and R10.4* to fit your needs.

* R Values are calculated specifically for the colder climates and offer the best long term insulating value.
  • Models:
    650, R16* - 3" Thick High Density EPS (expanded polystyrene)
    308TM, R12* - 2" Thick High Density EPS
    308, R10.4 - 2" Thick EPS
  • Section Joint: Tongue and Groove joint between sections with thermal break and flexible vinyl seal
  • 20 gauge steel concealed backer plates, pre-painted 20 GA galvanized end caps
  • Finish: 4-Coat Process, Galvanized, Phosphate Treated, Baked-on Epoxy Base Coat, and Polyester Top Coat
  • Colors selection: White
  • Bottom weather seal: U-shape loop type PVC with adjustable aluminum retainer
  • 1 Year Limited Warranty
  • Widths up to 24', heights up to 16' (larger sizes are available in some cases depending on the door weight, depends on door model and windows required)
  • 25,000, 50,000 & 100,000 high cycle torsion springs
  • Windows, Standard with 1/8" Clear Single-pane Glass
  • Tempered, obscure, insulated glass or special glazing as specified by customer
  • Manual chain hoist or electric operation
  • Low clearance, high lift or vertical lift track and hardware also available
  • Powder coated track and hardware
  • 15" radius torsion hardware; track is 2" hemmed and bracket mounted. 3" track supplied when required by weight. Heavy duty steel rollers, non corrosive door fixtures and 14 gauge graduated hinges are standard. Double end hinges and long stem rollers are included on doors as required by width and weight. U-shaped galvanized struts are supplied as required by width and weight to keep the door rigid. All doors are standard with interior slide bolt lock.

    Therma Series
Standard Widths Bays Horizontally
  8'-2" 2
  9'-2" 2
  10'-2" 3
  12'-2" 3
  14'-2" 4
  16'-2" 4
  18'-2" 5
  20'-2" 5
  22'-2" 6
  24'-2" 6
Standard Heights Sections Vertically
  8'-1" 4
  9'-1" 5
  10'-1" 5
  12'-1" 6
  14'-1" 7
  16'-1" 8


  • 5/32" Rain
  • 5/32" Solar Cool Bronze
  • 1/4" Barique Wire
  • 1/4" Clear
  • 1/4" Mirropane
  • 1/4" Misco Wire
  • 1/4" Plexiglass
  • 1/4" Polycarbonate
  • 1/8" Bronze
  • 1/8" Clear
  • 1/8" Gluechip
  • 1/8" Gray
  • 1/8" Greylite #31
  • 1/8" Mistlite
  • 1/8" P516 Obscure
  • 1/8" Acrylic
  • 1/8" Polycarbonate
  • 1/8" Satin Etch
  • 1/8" Seedy
  • 1/2" Insulated Clear
  • 7/32" White Diffused Laminated


Serving The Following Areas: Pierce County, King County, Algona, Auburn, Beaux Arts Village, Bellevue, Black Diamond, Bonny Lake, Bothell, Browns Point, Buckley, Burien, Clyde Hill, Covington, Dash Point, Des Moines, Edgewood, Enumclaw, Fall City, Federal Way, FIfe, Fox Island, Frederickson, Gig Harbor, Hunts Point, Issaquah, Kenmore, Kent, Kirkland, Lake Forest Park, Lakewood, Medina, Maple Valley, Mercer Island, Milton, Newcastle, Normandy Park, North Bend, Pacific, Parkland, Puyallup, Ravensdale, Redmond, Renton, Sammamish, Seatac, Seattle, Shoreline, Skykomish, Snoqualmie Pass, Snoqualmie , Spanaway, Steilacoom, Sumner, Tacoma, Tukwila, University Place, Woodinville, Yarrow Point