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Therma-Tru Benchmark Fiberglass Door vs MMI Door Fiberglass 4-Lite Front Door

The Therma-Tru Benchmark is the stronger door for storm-prone coasts and for anyone who wants a finished, painted Shaker look out of the box. It is impact rated for large missiles, rated for Wind Zone 4, and carries a composite frame and edges that resist rot. The MMI Door 81.75 in. fiberglass 4-lite is the simpler pick for a covered, milder-climate entry where four clear glass lites and an Energy Star label matter more than impact ratings. Owners of fiberglass doors in this class report they hold paint and resist warping better than wood or steel, though both need a good seal and proper flashing to stay dry.

  • Choose the Therma-Tru Benchmark if you live in a high-wind or hurricane zone, want a prefinished Shaker door with Low-E glass, or need a composite frame that will not rot.
  • Choose the MMI Door 81.75 in. fiberglass 4-lite if you want more daylight through four clear glass lites and an Energy Star door for a sheltered entry.

Prices

  • Therma-Tru Benchmark Fiberglass Door: $78.75 at littlewoods (checked today)
  • MMI Door Fiberglass 4-Lite Front Door: $769.00 at eBay (last seen Nov 8)
  • Difference: the Therma-Tru Benchmark Fiberglass Door is $690.25 cheaper than the MMI Door Fiberglass 4-Lite Front Door at the latest prices (Nov 8 and Nov 10)
Therma-Tru
Therma-Tru Benchmark

Therma-Tru Benchmark Fiberglass Door

Therma-Tru Benchmark

3(7 ratings)
$78.75at littlewoodsChecked 3 h ago
See all prices and details
Visit littlewoods
Pros
  • Impact rated for large missiles and rated for Wind Zone 4
  • Composite frame and edges resist rot and moisture
  • Factory painted with a 10-year limited finish warranty
  • Low-E glass and ball-bearing hinges
  • Available in right- and left-hand inswing
Cons
  • Not listed as Energy Star
  • Only six paint colors
  • Shaker glass area is smaller than a 4-lite door
MMI Door
MMI Door 81.75 in. Fiberglass 4-Lite Prehung Front Entry Door

MMI Door Fiberglass 4-Lite Front Door

MMI Door 81.75 in. Fiberglass 4-Lite Prehung Front Entry Door

3.5(6 ratings)
$769.00at eBayChecked Nov 8
See all prices and details
Visit eBay

Store links may earn us a commission.

Pros
  • Energy Star certified
  • Four clear glass lites let in more light
  • Fiberglass slab resists dents and rust
  • Simple black finish suits modern entries
Cons
  • No impact or wind-zone rating listed
  • Clear glass gives less privacy and insulation than Low-E
  • Frame and hardware details are sparse
  • Fewer finish choices

What separates them

Therma-Tru Benchmark Fiberglass DoorMMI Door Fiberglass 4-Lite Front Door
Impact and wind ratingLarge Missile Impact Rated, Wind Zone 4-Missile Level D, design pressure +75/-80 psfNo impact or wind-zone rating listed
GlassFlush-glazed Low-E glass with simulated divided litesFour clear glass lites
Frame and edgesBenchmark PLUS composite frame and edges that resist rot and moistureFiberglass slab; frame construction not specified
FinishFactory painted in six colors with a 10-year limited finish warrantyBlack finish; warranty terms not stated
Energy StarNot listed as Energy StarEnergy Star certified
Hardware and hingesBall-bearing hinges; ASSA 2002 Connect lock case; lockset and deadbolt supportedPrehung; hardware details not specified
Style2-panel Shaker, modern, smooth or wood-grain opaque surface4-lite design with clear glass
Size36 in. x 80 in., 4-9/16 in. jamb, right- or left-hand inswing81.75 in. height, single prehung front entry

Price history

$3,588.86$78.75
Nov 1Nov 10
  • Therma-Tru Benchmark Fiberglass Door: lowest $78.75 on Nov 10 at littlewoods.
  • MMI Door Fiberglass 4-Lite Front Door: lowest $2,649.99 on Nov 8 at Wayfair; $3,588.86 on Nov 10.

Prices at every store

Therma-Tru Benchmark Fiberglass Door

  • littlewoodsNew

    In stock

    $78.75Checked 3 h ago
    Visit littlewoods
  • ArborNew

    In stock

    $384.00+ $149.00 shippingChecked 3 h ago
    Visit Arbor

Also available at

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

MMI Door Fiberglass 4-Lite Front Door

  • WayfairNew

    In stock

    $2,649.99Checked Nov 8
    Visit Wayfair
  • Lowe'sNew

    In stock

    $3,588.86Free shippingChecked 5 h ago
    Visit Lowe's
  • eBayNew

    Availability unknownSold by chenju_66 (100% positive, 532 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $769.00Free shippingChecked Nov 8
    Visit eBay

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

All 3 stores and price history →

Specs compared

SpecTherma-Tru Benchmark Fiberglass DoorMMI Door Fiberglass 4-Lite Front Door
ColorWhiteBlack
LocationFrontFront
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—
Impact ratingLarge Missile Impact Rated—
Show all 40 specsShow fewer specs
SpecTherma-Tru Benchmark Fiberglass DoorMMI Door Fiberglass 4-Lite Front Door
Framing materialFiberglass—
Forced entry resistanceTrue—
Lock CaseASSA 2002 Connect—
StyleModern—
Door MechanismSwing—
Height80-in—
Width36-in—
Size36-in x 80-in—
Thickness4-9/16-in—
Door HandingRight-hand inswing, Left-hand inswing

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 Therma-Tru Benchmark. It is large-missile impact rated and rated for Wind Zone 4, while the MMI Door lists no impact or wind-zone rating.
Which lets in more light?
The MMI Door, with four clear glass lites. The Benchmark uses a smaller flush-glazed Low-E window with simulated divided lites.
Which is more energy efficient?
The MMI Door carries an Energy Star label. The Benchmark uses Low-E glass but is not listed as Energy Star, so check the label on the exact unit you buy.
Which lasts longer?
Both are fiberglass, which resists warping, rot and rust. The Benchmark adds a composite frame and edges plus a 10-year limited finish warranty, which helps in wet climates.
Is the Benchmark worth stepping up to?
Yes if you face high winds, want a factory finish, or need a rot-resistant frame. If your entry is sheltered and you want more daylight, the MMI Door covers the basics.

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More comparisons

  • Therma-Tru Benchmark vs Fiber-Classic Doors
  • Therma-Tru Benchmark vs National Door Company ZZ364628R Fiberglass Smooth, Primed – 36″x80″ Full Lite, Clear Glass
  • Therma-Tru Benchmark vs Reliabilt Steel Right Hand Inswing Prehung Front Door 36 80 x 4-9/16 in
  • Therma-Tru Benchmark vs Lily Ann 36" x 80" Classic Prehung Fiberglass Door
  • Therma-Tru Benchmark vs KHSHOW Fiberglass Exterior Front Door – 36x80In, Right-Hand Inswing, 4-Lite Frosted Glass
  • Masonite Fiberglass Exterior Door vs Therma-Tru Benchmark
  • Masonite Fiberglass Exterior Door vs MMI Door 81.75 in. Fiberglass 4-Lite Prehung Front Entry Door

Buying guides that pick them

  • Best prehung exterior front doors
—
Number Of Panels2-panel—
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—
Energy Star—Yes
Type of Glass—Clear Glass
Glass—Yes