Therma Series
Therma Series 308

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. Now available in 24 gauge steel face.

General Information

  • Door Face: Wood grain texture, pencil grooves 4″ on center
  • Section Heights: 21″ and 24″
  • 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
STANDARD WIDTHS: 8′-2″ 9′-2″ 10′-2″ 12′-2″ 14′-2″ 16′-2″ 18′-2″ 20′-2″ 22′-2″ 24′-2″
Bays Horizontally 2 2 3 3 4 4 5 5 6 6
STANDARD HEIGHTS: 8′-1″ 9′-1″ 10′-1″ 12′-1″ 14′-1″ 16′-1″
Sections Vertically 4 5 5 6 7 8


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.

Recommended Options

25,000, 50,000 or 100,000 Cycle Torsion Springs 

Insulated Glass 

LiftMaster H-50 or T-50 Commercial Opener

Other Options

  • 24 gauge steel face
  • Single Pane Glass
  • Lift Options
    • Low Clearance
    • High Lift
    • Vertical Lift
  • Angle Mounted Track
  • 3” Track/Rollers
  • Double End Hinges and Long Stem Rollers (when not standard)
  • Chain Hoist, Reduced Drive
  • Powder Coated Hardware


* The actual color may slightly vary from what you are seeing, depending on the color calibration of your computer monitor.