What to Look for in an Exterior Door: Key Features to Consider

Most front doors don't give out at the slab. They give out at the edges, where a sill lets water wick under the floor, weatherstripping goes flat after two summers, or a jamb splits the first time someone shoulders it. The best exterior doors get those details right, and this guide walks through them in the order that matters: material, frame, security, glass, then fit.

What Is the Best Material for an Exterior Door?

The best exterior door material depends on its weather exposure and your priorities. Mahogany looks richest but needs periodic refinishing. Fiberglass resists moisture and dents with little upkeep. Steel costs the least and resists forced entry, though it dents. Wrought iron is the strongest and most dramatic, but it costs more.

The fiberglass vs. steel exterior door choice usually comes down to dents and budget. Steel saves money, while fiberglass takes hail and bike handlebars without a mark. If you're torn between wood and fiberglass, our look at fiberglass doors vs. wood doors puts the two head to head. Next, look at what the door hangs in.

Check the Frame, Sill, and Weatherstripping Before the Slab

A slab is only as good as the opening it swings in. If your old frame is soft at the bottom corners, out of square, or has a worn sill, buy a prehung exterior door. It arrives mounted in its own jamb with hinges, threshold, and weatherstripping fitted, so the seal is set at the factory instead of improvised on site. A slab alone only makes sense when the existing frame is sound.

Either way, check three parts:

• Threshold. An adjustable one lets you raise the seal as the house settles, a feature Consumer Reports recommends.
• Weatherstripping. Silicone or rubber compression seals hold their shape longer than foam.
• Jamb ends. Plain wood rots where the jamb meets the sill, so ask for a rot-resistant frame base.

The prehung units in AAA Doors' exterior doors collection come with a preassembled jamb and weatherstripping. Your installer shims, fastens, and seals the unit instead of building a frame from scratch, where most leaks start.

Security Features That Make a Front Door Hard to Kick In

The most secure front door is one whose weakest point has been reinforced, and that point is rarely the door itself. In Consumer Reports' forced-entry testing, doors of every material failed the same way, with the jamb splitting near the lock's strike plate.

Look for:

1. A reinforced strike plate and hinges fastened with 3-inch screws that reach the wall framing.
2. A deadbolt that throws at least one inch into the frame.
3. A solid core, since thin or hollow doors give way around the lock.
4. Tempered or laminated glass on any lite within arm's reach of the thumb turn.

A solid mahogany door with good hardware in a reinforced frame will take a kick better than a steel door hung in a weak jamb.

Glass, Energy Ratings, and Sun Exposure

Glass sells doors, and it's also where most heat moves through them. For energy-efficient exterior doors, look for insulated dual-pane glass with a low-E coating and an ENERGY STAR label. ENERGY STAR rates doors by glazing level, so a full-lite door has a different U-factor limit than a solid one.

Then check which way the door faces. A west- or south-facing entry in Texas can take hours of afternoon sun, which bakes finishes and heats dark doors fast. On that exposure, an overhang or covered porch does more for a mahogany door than any stain. Our guide to choosing a door for your Texas home covers Texas-specific factors. The same applies to any sunny entry.

Size, Swing, and Style

The standard entry door is 36 by 80 inches, but 8-foot doors suit homes with taller ceilings, and sidelites or double doors fill wider openings. Measure the rough opening, not the old slab standard exterior door sizes chart, to match the numbers. Get this wrong and even a great door won't seal. Check the swing on each product's handing diagram before you order, too.

The best front doors also suit the architecture. A Craftsman bungalow wants a lite-top door with a dentil shelf, a Prairie home pairs with a 9-marginal-lite pattern, and a modern build looks right with horizontal glass lines.

If you're working out how to choose a front door, rank exposure first, security second, and looks third. At AAA Doors, our door experts can help you match the material, size, and style to your opening before you order. Whatever you pick, a mid-priced door in a sound, sealed, reinforced frame will outlast a premium slab hung in a tired one.

Frequently Asked Questions

How much should a new exterior door cost?

At AAA Doors, sale prices run from about $725 for a 3 ft. x 6 ft. 8 in. mahogany slab to about $2,350 for a 6 ft. x 8 ft. prehung double door. Budget separately for installation, hardware, and finishing.

How long do exterior doors last?

A well-installed door with a maintained finish can last decades. Sun and a neglected finish shorten that faster than anything else.

Is mahogany a good choice in a humid climate?

Yes, if you seal it properly. Moisture gets in through unsealed edges, so seal all six sides right after installation.

Does a storm door help or hurt a wood front door?

It adds a layer against wind and rain. On a sunny wall, though, a full-glass storm door can trap heat against the entry door and damage the finish, so read the door's warranty first.

Should an exterior door swing in or out?

Most US homes use inswing entry doors, which keep the hinges inside. Outswing doors save floor space and seal tighter under wind pressure, so they're common in hurricane zones. If you go outswing, use non-removable hinge pins.