MODEL 308 —————-R Value 10.4
MODEL 308TM ————- R Value 12
MODEL 650 —————-R Value 16


Door sections are roll formed from hot dipped G-40 galvanized steel and comply with ASTM A653/A653M standards.  The sections are sandwich construction type and insulated with expanded polystyrene.

  • Model 308 2″ thickness, R Value 10.4, (RSI-1.8)
  • Model 308TM, 2″ thickness, R Value 12, (RSI-2.1)
  • Model 650, 3″ thickness, R Value 16, (RSI-2.8)

The door sections are also thermally broken and have a thermal barrier joint seal between door sections.  A compressible loop-type PVC bottom weather seal is secured with an extruded aluminum retainer that extends the full width of the bottom of the door.  Door widths are available up to 24′ 2″ and heights up to 16″ in three inch incroments using 21″ and 24″ section heights.

Optional 24 page steel face, Model 308-24, 308-24, 308TM-24 and 650-24. R Values are calculated specifically for the colder climates and offer the best long term insulating Value.


The door sections have a four-coat protection system:
(1) Galvanizing
(2) Phosphate treatment
(3) Baked on epoxy base coat
(4) White finish coat


Window Selections:
(A) Clear Anodized Full-View Section (not available on Model 650)
(B) ASA 38″ Wx11″ H Lite
(C) ASA 15″ Wx11″ H Lite
(D) ASA 22″Wx10″ H Lite
(E) ASA 21″ Wx3″ H Lite

All windows are standard with 1/8″ clear annealed single pane glass. Optional single pane tempered, textured, colored and insulated glass.


Hardware components are hot-dipped galvanized steel with exception of the rollers. All steel components comply with ASTM A653/A653M.  Assembled doors meet wind load standards and all specifications esteblished under ANSI/DASMA 102-2011 Garage Door Specifications.  Manual push up or chain hoist operation as required by door size.


The torsion spring counter balance assembly consists of:

  • Die cast cable drums
  • 1″ diameter steel torsion tube or solid shaft
  • Stranded galvanized aircraft cables with 5:1 safety factor
  • Minimum 10,000 cycle oil tempered torsion springs, spring wire complies with ASTM A229/A229M-12 specifications


Tracks are commercial quality G-40 galvanized steel and comply with ASTM A653 / A653M. Track systems are 2″ or 3″ in size, 16 gauge to 12 gauge depending on the door size and weight.  Vertical tracks are graduated and provide an adjustable wedge-type closing actions.  Horizontal traks are reinforced with steeel angle of adequate length and gauge to help prevent deflection.  Additional field bracing must be provided by the garage door installer to prevent deflection of establish a rigid installation. 


Mounting Types

(B) ASA 38"Wx11"H Lite

(D) ASA 22"Wx10"H Lite

(C) ASA 15"Wx11"H Lite

(E) ASA 21"Wx3"H Lite


Northwest Door warrants its products to be free of defects in materials for a period of one year after date of shipment from it’s plant.  This warranty is limited to finishing any part or parts due to product failure during the first year.  Northwest Door has sole right to determine whether failure of product is due to product or abuse of product.  Warranty does not apply to any product that, in the judgement of Northwest Door, was subjected to misuse or neglect or has been altered during installation in any way that may have impaired its safety, operation or efficiency, nor to any product that has been subjected to an accident. WARNING: Any adjustment on your door should be made by an experienced garage door technician such as Vally Garage Doors.  Serious injury can result from improper adjustments to door hardware.  Northwest Door reserves the right to make product changes without prior notice. 

Business Hours

Mon – Friday: 8:00am to 5:00pm

Available for emergency calls 24/7

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