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Deal.ai › Therma-Tru › External Door
Therma-Tru
Therma-Tru Fiberglass Left-Hand Inswing Prehung Core Front 36 in 80 in

Therma-Tru Fiberglass Left-Hand Inswing Prehung Core Front 36 in 80 in

Best price now

$479.00at Lowe'sObserved at 12:36 PM

Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.

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Our take on the Therma-Tru Fiberglass Left-Hand Inswing Prehung Core Front 36 in 80 in

This is a Therma-Tru prehung fiberglass front door, 36 in wide by 80 in tall, left-hand inswing, in white with a modern glass design. Fiberglass skins resist dents, rot and warping better than wood and hold paint well, and the prehung frame with a 4-9/16 in jamb depth fits a standard 2x4 wall. The best new price is $479.00 at Lowe's as of November 8, 2026, and only one store lists it new, so there is no lower price to compare against.

Best forReplacing a standard 36x80 front entryHomeowners who want a low-maintenance fiberglass doorModern-style exteriors with sidelight-free single entryBuyers who want a prehung unit rather than a slab
Pros
  • Fiberglass skin resists dents, rot and moisture better than wood
  • Prehung in a frame, so installation is faster than hanging a slab
  • Standard 36x80 size fits most entry openings
  • 4-9/16 in jamb depth suits typical 2x4 framed walls
  • White finish is ready to paint or leave as is
Cons
  • Left-hand inswing only; right-hand openings need another model
  • Glass panel adds cost and may need a warranty check on breakage
  • Prehung unit is heavy and awkward for one person to set
  • Only one store lists it new, so price shopping is limited

Therma-Tru Fiberglass Left-Hand Inswing Prehung Core Front 36 in 80 in prices at every store

  • Lowe'sNew

    In stock

    $479.00Free shippingObserved at 12:36 PM
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Store links may earn us a commission. Price via Klarna.

Therma-Tru Fiberglass Left-Hand Inswing Prehung Core Front 36 in 80 in price history

Lowest price we've seen: $479.00 on Nov 8 at Lowe's. Tracked across 1 store since Nov 8.

Specifications

Hang
LSource
Frame Depth (")
4.5625Source
Width (")
36.0Source
Glass
YesSource
Color
WhiteSource
Height (")
80.0Source
Style
ModernSource
Door
LeftSource

Questions and answers

Is $479 a good price for this door?
It is the only new price listed, $479.00 at Lowe's as of November 8, 2026. With one seller there is no lower competing price to beat, so compare it against similar fiberglass prehung doors before buying.
What does left-hand inswing mean?
The hinges are on the left when you look at the door from outside, and it swings inward. Measure your existing opening and hinge side before ordering, because a right-hand door will not fit the same frame.
Will it fit a standard doorway?
It is 36 in wide and 80 in tall with a 4-9/16 in frame depth, the common size for a 2x4 wall. Check your rough opening against Therma-Tru's installation guide before you buy.
Does the glass come installed?
Yes, this is a single door with glass in the design, sold prehung in its frame. Confirm with the listing whether the glass is insulated or decorative before ordering.
Can I paint it?
Yes. Fiberglass doors take exterior-grade paint well; the white factory finish can be left as is or painted to match your exterior. Follow Therma-Tru's prep instructions for adhesion.
What is in the box?
A prehung door unit: the fiberglass slab, frame and jamb, with the door hung on its hinges. Confirm whether the handle, lockset and threshold are included before you buy.
Where is the Therma-Tru Fiberglass Left-Hand Inswing Prehung Core Front 36 in 80 in cheapest?
At Lowe's, for $479.00, as of our latest check.

Stores we've priced the Therma-Tru Fiberglass Left-Hand Inswing Prehung Core Front 36 in 80 in at

  • Lowe's deals and prices