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Therma-Tru Benchmark Fiberglass Door vs Therma-Tru Fiber-Classic Doors

Both are Therma-Tru fiberglass entry doors, so neither warps, rots, dents or rusts like wood or steel. The Benchmark is the tougher, more specified door: large-missile impact rated, Wind Zone 4, forced-entry resistant, with a composite frame and a 10-year finish warranty. The Fiber-Classic is the broader, more flexible line, with glass options like Clear Lite with Blinds, ENERGY STAR ratings and several frame profiles. Buy the Benchmark if you face hurricane or coastal wind codes; buy the Fiber-Classic if you want more styling and glazing choices at a mainstream level.

  • Choose the Benchmark if you need a code-compliant impact door for a high-wind or coastal home and want a composite frame that resists moisture.
  • Choose the Fiber-Classic if you want a proven fiberglass door with more glass, grille and frame styling options and ENERGY STAR efficiency.

Prices

  • Therma-Tru Benchmark Fiberglass Door: $78.75 at littlewoods (checked today)
  • Therma-Tru Fiber-Classic Doors: $400.00 at eBay (last seen Nov 9)
  • Difference: the Therma-Tru Benchmark Fiberglass Door is $321.25 cheaper than the Therma-Tru Fiber-Classic Doors at the latest prices (Nov 9 and Nov 10)
Therma-Tru
Therma-Tru Benchmark

Therma-Tru Benchmark Fiberglass Door

Therma-Tru Benchmark

3(7 ratings)
$78.75at littlewoodsChecked 1 h ago
See all prices and details
Visit littlewoods
Pros
  • Large-missile impact rated and Wind Zone 4
  • Composite frame and edges resist rot and moisture
  • Forced-entry resistance and ASSA lock case
  • 10-year limited finish warranty
  • Ball-bearing hinges for support
Cons
  • Limited to a 2-panel Shaker look
  • Six paint colors only
  • Impact-rated build is more door than mild climates need
Therma-Tru
Fiber-Classic Doors

Therma-Tru Fiber-Classic Doors

Fiber-Classic Doors

$400.00at eBayChecked Nov 9
See all prices and details
Visit eBay

Store links may earn us a commission.

Pros
  • ENERGY STAR rated configurations
  • Clear Lite with Blinds for privacy without curtains
  • Several frame profiles and grille colors
  • Impact ratings up to 175 mph on rated builds
  • Long-running, widely available Therma-Tru line
Cons
  • Impact and forced-entry ratings depend on the exact configuration
  • No stated finish warranty as long as the Benchmark's
  • Frame material varies by build

What separates them

Therma-Tru Benchmark Fiberglass DoorTherma-Tru Fiber-Classic Doors
Impact and wind ratingLarge Missile Impact Rated, Wind Zone 4, DP +75/-80 psfImpact rated up to 175 mph at DP-55 on rated configurations
FrameBenchmark PLUS composite frame and edges, rot and moisture resistantScroll Lite or Flat Lite frame profiles; composite availability varies by build
Glazing choicesFlush-glazed Low-E glass with simulated divided litesClear Lite with Blinds and other glass names, 1 1/8 in SDL bars
EnergyInsulating core, Low-E glass; ENERGY STAR not statedENERGY STAR rated configurations
SecurityForced-entry resistance and ASSA 2002 Connect lock caseStandard lock prep; forced-entry rating not stated
FinishPainted smooth or wood-grain opaque, 10-year limited finish warrantyFactory finishes across the Fiber-Classic line
Sizing36 in x 80 in, 4-9/16 in frame, right or left inswingMultiple widths and heights across the line
Style rangeModern Shaker 2-panel, 6 paint colorsWide catalog of panel and glass designs, grille colors White, Almond, Bronze

Price history

$897.78$78.75
Nov 8Nov 10
  • Therma-Tru Benchmark Fiberglass Door: lowest $78.75 on Nov 10 at littlewoods.
  • Therma-Tru Fiber-Classic Doors: lowest $897.78 on Nov 8 at Lowe's; $897.78 on Nov 10.

Prices at every store

Therma-Tru Benchmark Fiberglass Door

  • littlewoodsNew

    In stock

    $78.75Checked 1 h ago
    Visit littlewoods
  • ArborNew

    In stock

    $384.00+ $149.00 shippingChecked 1 h ago
    Visit Arbor

Also available at

  • Lowe'sCheck price at Lowe's
All 2 stores and price history →

Therma-Tru Fiber-Classic Doors

  • eBayNew

    In stockSold by motek1961 (100% positive, 1,200 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $400.00+ $40.00 shippingChecked Nov 9
    Visit eBay
  • Lowe'sNew

    In stock

    $897.78Free shippingChecked 1 h ago
    Visit Lowe's
  • Lowe'sNew

    Availability unknown

    $5,895.23+ $79.00 shippingChecked 1 h ago
    Visit Lowe's

Store links may earn us a commission. Some prices via Klarna.

All 2 stores and price history →

Specs compared

SpecTherma-Tru Benchmark Fiberglass DoorTherma-Tru Fiber-Classic Doors
Impact ratingLarge Missile Impact Ratedup to 175 mph (DP-55)
Door typeFiberglass In-Swing Side-Hinged Door—
Surface finishSmooth Surface & Wood Grain Opaque—
ConfigurationX—
Frame widthW-959mm(37.75")—
Frame heightH-2089mm(82.25")—
Panel widthW-913mm(35.93")—
Panel heightH-2013mm(79.25")—
Design pressure+75/-80 psf—
Wind zoneWind Zone 4-Missile Level D—
Framing materialFiberglass—
Forced entry resistanceTrue—
Show all 40 specsShow fewer specs
SpecTherma-Tru Benchmark Fiberglass DoorTherma-Tru Fiber-Classic Doors
Lock CaseASSA 2002 Connect—
ColorWhite—
StyleModern—
Door MechanismSwing—
Height80-in—
Width36-in—
Size36-in x 80-in—
Thickness4-9/16-in—
Door HandingRight-hand inswing, Left-hand inswing—
Number Of Panels2-panel—

What reviewers say

Therma-Tru Benchmark Fiberglass Door

Owners value the door for its durability in harsh climates and its clean Shaker aesthetic. It is praised for its rot-resistant composite edges but noted for requiring precise installation due to its weight.

What people mention
  • DurabilityPraisedFiberglass construction prevents the rotting, warping, and denting common in wood or steel doors.
  • Weather ResistancePraisedThe Large Missile Impact rating and Wind Zone 4 certification make it suitable for coastal storm protection.
  • InstallationMixedWhile prehung with ball-bearing hinges, the heavy panel requires two people to install safely.

Questions and answers

Which is better for a hurricane zone?
The Benchmark. It is large-missile impact rated, Wind Zone 4 and forced-entry resistant with a composite frame. The Fiber-Classic reaches high impact ratings too, but only on specific rated configurations, so confirm the exact build.
Which lasts longer?
Both are fiberglass, so neither rots or rusts. The Benchmark's composite frame and edges and its 10-year finish warranty give it the edge on long-term durability.
Is the Benchmark worth stepping up to?
If you face wind-borne debris codes or coastal moisture, yes. Its ratings and composite frame are hard requirements there. In a mild inland climate, the Fiber-Classic covers the basics with more styling choice.
Which has better glass options?
The Fiber-Classic. It offers Clear Lite with Blinds and multiple frame profiles and grille colors. The Benchmark uses flush-glazed Low-E glass with simulated divided lites.
Which is more energy efficient?
The Fiber-Classic carries ENERGY STAR ratings on qualifying configurations. The Benchmark has an insulating core and Low-E glass but no stated ENERGY STAR rating.
Do both come prehung?
The Benchmark ships prehung with frame, weatherstripping and brickmould. Fiber-Classic doors are typically sold prehung too, but confirm the configuration you order.

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More comparisons

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  • National Door Company ZZ364628R Fiberglass Smooth, Primed – 36″x80″ Full Lite, Clear Glass vs Fiber-Classic Doors
  • Therma-Tru Benchmark vs KHSHOW Fiberglass Exterior Front Door – 36x80In, Right-Hand Inswing, 4-Lite Frosted Glass
  • Therma-Tru Benchmark vs MMI Door 81.75 in. Fiberglass 4-Lite Prehung Front Entry Door
  • Masonite Fiberglass Exterior Door vs Therma-Tru Benchmark

Buying guides that pick them

  • Best prehung exterior front doors
MaterialFiberglass—
Core MaterialInsulating core—
Frame MaterialComposite—
Included AccessoriesWeatherstripping, Brickmould—
Supported AccessoriesLockset, Deadbolt—
Door ConfigurationSingle Door—
Finish TypePainted—
Installation LocationExterior—
Installation TypePre-hung, Ready to install—
Installation RequirementsReady to install—
Hardware TypeBall-bearing hinges—
Hardware MaterialComposite (door frame and edges)—
Glass MaterialLow-E glass—
Energy EfficiencyInsulating core—
LocationFront—
Glass name—Clear Lite with Blinds
Energy rating—ENERGY STAR
Frame profiles—Scroll Lite Frame, Flat Lite Frame