Best Exterior Doors for a 35.5 X 79-Inch Opening
No listed product is specified as exactly 35.5 x 79 inches, so measure the existing door slab and frame before ordering. The closest listed slab is the KHSHOW fiberglass door, with a stated actual size of 35-3/4 x 79 inches. For buyers replacing a complete entry unit, the KHSHOW prehung options include a frame and brickmould; the JUBEST steel slab is a solid-core-style alternative with a polyurethane core. The JUBEST security door is an additional screen door, not a replacement for the main exterior door.
| Product | Best for | Important fit detail |
|---|---|---|
| KHSHOW 35-3/4 x 79 Fiberglass Slab | Closest stated slab dimensions | Frame not included |
| JUBEST 36 x 80 Steel Slab | Steel construction and insulation | Slab; check actual dimensions |
| KHSHOW 36 x 80 Frosted-Glass Door | Light and privacy with a new frame | Knock-down assembly required |
| KHSHOW 36 x 80 Black French Door | Dark finish and frosted glass | Knock-down assembly required |
| JUBEST 36 x 80 Security Door | Added screening and security layer | Surface-mount screen door |
KHSHOW 35-3/4 x 79 Fiberglass Slab
This fiberglass slab is the closest stated size to a 35.5 x 79-inch door: its actual dimensions are 35-3/4 x 79 x 1-3/4 inches. It has a woodgrain finish, four frosted glass lites, pre-cut hinge mortises, and a lockset hole. The listed handing is right-hand inswing/outswing.
Best for: Buyers replacing a slab who can verify that the extra quarter inch of width works with their frame. Fiberglass construction is described as low maintenance and resistant to rot and rust. Limitation: This is a slab only; the frame and accessories are not included. Confirm hinge locations and handing before purchase.
JUBEST 36 x 80 Steel Door Slab
This white steel slab has a classic six-panel design, a reinforced lock area, and a polyurethane foam core intended to provide thermal and sound insulation. Its handing is reversible, and the primed surface is ready for exterior paint. The product listing gives a nominal size of 36 x 80 inches.
Best for: Buyers who prioritize a steel door, a paintable traditional appearance, and an insulated core. It was selected as a non-glass alternative to the fiberglass slab. Limitation: The listed size is not an exact match for a 35.5 x 79-inch opening, and the product is a slab rather than a complete prehung unit. Verify actual slab measurements and lock preparation.
KHSHOW White Fiberglass Door With Frosted Glass
This nominal 36 x 80-inch right-hand-inswing door combines a fiberglass surface, foam core, four frosted glass lites, vinyl frame, and brickmould. Its primed woodgrain-textured surface can be painted. The frosted glass is intended to admit light while providing privacy.
Best for: Buyers replacing the door and frame together who want natural light without clear glazing. It was selected because its listed frame and brickmould make it a more complete replacement option than a slab. Limitation: It arrives knock-down and requires assembly. Door lock accessories are not included, and the listed 36 x 80 size does not confirm fit in a smaller opening.
KHSHOW Black Fiberglass French Entry Door
This 36 x 80-inch right-hand-inswing fiberglass entry door has a black finish, frosted glass, vinyl frame, and brickmould. The listing describes the fiberglass as scratch-resistant and low maintenance. The glass allows natural light through while limiting visibility.
Best for: Buyers seeking a dark-finish, glazed entry unit with a frame included. It offers a different appearance from the white primed option while retaining privacy glass. Limitation: This is a knock-down unit that must be assembled before installation. Lock accessories are not included, and its nominal size may not suit a 35.5 x 79-inch opening without appropriate framing work.
JUBEST 36 x 80 Steel Security Screen Door
This surface-mount steel security door is designed to sit outside an existing entry door. Its expanded steel screen allows airflow and natural light while helping keep insects out. The heavy-duty frame includes a lockbox with a 2-3/8-inch backset, but the lockset is not included.
Best for: Homeowners who want an additional screened barrier, not a replacement exterior door. It was selected as a useful companion option for an entryway. Limitation: It is listed for a 36 x 80-inch entry and requires a 1-inch flat mounting surface on the trim. Check the installation fit range; it does not resolve a main-door size mismatch.
Buying Guide: How to Choose a Door for This Opening
Is 35.5 x 79 the opening size or the slab size?
Measure the door itself, not just the rough opening. Record width, height, and thickness, then check the existing frame, hinge positions, lockset location, and handing. A nominal 36 x 80-inch door is not necessarily an exact fit for a 35.5 x 79-inch slab measurement.
Should you choose a slab or a prehung door?
Choose a slab when the existing frame is in good condition and its hinge and lock preparations match the replacement. Choose a prehung unit when replacing the frame as well, but confirm the rough opening and installation requirements. A frame included with a product does not guarantee it fits your opening.
Which material and glass details matter?
Fiberglass options in this list are described as low maintenance and resistant to dents or scratches; the steel slab offers a polyurethane core and a paintable six-panel design. Frosted glass can add daylight while limiting visibility. Check whether glass, frame, brickmould, hardware, and assembly are included before choosing.
What measurements should you verify before ordering?
- Actual slab width, height, and thickness.
- Hinge count, locations, and spacing.
- Lockset hole position and backset.
- Door swing and handing, viewed from the correct side.
- Frame dimensions and the space available for installation.
Frequently Asked Questions
Is any listed door exactly 35.5 x 79 inches?
No. The closest stated slab size is 35-3/4 x 79 inches. The other main doors are listed at a nominal 36 x 80 inches.
Which listed door is closest in actual size?
The KHSHOW fiberglass slab is listed at 35-3/4 x 79 inches. Measure your existing door and frame to confirm whether that width is suitable.
Does the closest-size door include a frame?
No. The 35-3/4 x 79-inch KHSHOW product is a door slab only. Its frame and accessories are not included.
Are the frosted-glass doors ready to install?
The listed KHSHOW framed glass-door units are knock-down products that require assembly. Their lock accessories are not included.
Can the JUBEST security door replace the main exterior door?
No. It is a surface-mount security screen door intended to add a screened layer outside an existing entry door.