Shared brochure. Use the 8300 column and read the thermal-rating footnotes; other listed models have different specifications.
D&L field guide · Doors, openers & documentation
Wayne Dalton 8300
An insulated steel sectional door in Wayne Dalton’s Classic Steel range. The shared 8300/8500 brochure must be read by model: their thermal specifications differ.
Garage Doors · Model
What to know before you choose
A homeowner comparing an insulated traditional steel door. Start with the opening and track requirements, then select the panel design, windows, and finish.
Make sure the proposal says 8300 if those are the specifications you intend to buy. The shared brochure also covers 8500 and all-glass variations; do not transfer figures between them.
Specification source: Wayne Dalton product information (opens in a new tab). Also see the brochure and model-specific notes below.
- Construction
- Steel / insulation / steel
- Insulation
- Polyurethane
- Published R-value
- 12.12 (calculated door-section value)
- Published U-factor
- 0.15 (manufacturer’s tested configuration)
- Appearance
- Classic steel panel designs
Thermal figures need context. R-value and U-factor describe different measurements; they are not interchangeable. The manufacturer’s configuration and test notes matter, particularly when windows or construction change. Do not rank these doors on the largest R-value alone.
Official manufacturer documents
Manuals, installation information & brochures
Choose the document that matches your model, production version, and hardware. PDFs open on the manufacturer’s host; download and support pages take you to the manufacturer’s document selector.
Documents remain on their official hosts so you can check for revisions. A working link does not establish compatibility with a different model.
How to identify the right door specification
- Read the equipment label. Look for the manufacturer and model label on the inside of the door. If it is missing, use your original invoice or ask for an inspection.
- Match the configuration. Match the construction, dimensions, glazing, track, and spring arrangement. A brochure can cover several different doors.
- Read the document scope first. Check its model list, language, revision, and warnings before using a diagram or procedure.
- Stop if the equipment does not match. Send clear photos through our contact page rather than guessing a part or adjustment.
If the door is crooked, a cable is loose, a spring is broken, or the door drops unexpectedly, stop operating it and arrange service. Do not adjust spring tension, loosen bottom brackets, or bypass safety devices. Installation documents are technical references, not a substitute for appropriate training.
Start with low-risk troubleshooting · Read garage door safety guidance · See installed-door examples
Your 8300 questions
Does the 8500 brochure specification also apply to the 8300?
No. Wayne Dalton publishes different thermal values for these models. Check the model column, the glazing configuration, and the footnotes rather than using the largest number on the shared brochure.
Does a higher R-value guarantee a warmer garage?
No single published figure guarantees a room temperature. Air leakage, perimeter seals, windows, the rest of the garage, and how often the door opens also matter. Compare like-for-like test conditions and the actual specified door.
Compare within garage doors
Compare the published specifications, then read each guide’s fit and document notes. A product-family range is not an exact-model rating.
C.H.I. Planks 2328
An insulated steel door with a horizontal plank appearance. C.H.I.’s Contemporary brochure identifies 2328 separately from other Planks constructions and window configurations.
Specifications, documents & guidance →
Amarr Classica
A carriage-house-style steel door family with multiple construction and insulation choices. This guide covers the family; the exact construction must be specified on an individual quote.
Specifications, documents & guidance →
From research to a working door
Need help matching the equipment?
Have the model label, a wide photo of the door and opener, and a description of the problem ready when you contact us. Ask the team how to share photos; do not share access codes. Our local team can discuss identification, service, and replacement options.
D&L Garage Doors · Local support
Choose your local team
Contact our Portland or Boise shop for equipment identification, repair and replacement questions. Call ahead before bringing in parts.
Also serving Salem & Mid-Valley and Vancouver & SW Washington through our regional service teams.
The showroom is at the back of the building near 67th Avenue and SE Foster Road. Enter the parking lot from 67th Avenue. Call ahead to confirm visit arrangements.
The showroom is near 38th Avenue and W Chinden Boulevard. Parking-lot access is from 38th Avenue. Call ahead to confirm visit arrangements.
Published by D&L Garage Doors. Manufacturer documents remain the authority for model-specific instructions. Report a correction or view business credentials.