French doors swing open on hinges and give a more traditional, formal look, while sliding doors move horizontally on a track and tend to suit a more contemporary, wide-open feel. Functionally, French doors let you open just one leaf for everyday traffic while keeping the other closed, whereas a slider's operable panel moves the same way every time — it comes down to look and how you actually use the opening more than any code difference.

Yes, double French doors are a common front-entry choice, especially on homes with a more formal or traditional architectural style, and they can carry the same impact and forced-entry performance requirements as a single entry door when specified correctly with matching hardware.

The astragal is the vertical bar between the two leaves of a double door that the inactive leaf's bolts drive into at top and bottom, locking it into the frame. It's what lets both leaves function as one rated assembly — without it, the door wouldn't perform to its tested pressure rating as a double unit.

When correctly installed and rated, both perform to the same tested wind-pressure and water-penetration standards — the difference is mechanical, not performance-based. A hinged door's seal depends on hardware compression at the hinge and lock side, while a slider's depends on the track and weatherstripping; both are engineered to meet the same code requirement, just through different hardware.

Yes, and it's a common configuration, especially at front entries — but the sidelight and transom glass need to carry the same impact protection as the door itself and be specified as part of one coordinated assembly rather than added separately after the door is ordered.

Fiberglass door slabs can be finished with a convincing wood-grain texture and stain, which is a common choice for French doors specifically because of the traditional look most homeowners want from this style — aluminum-framed glass options are also available for a more contemporary look.

Both can be engineered to high design pressure ratings; which "performs better" isn't really the right frame, since they're tested and rated as different assembly types. The real consideration is usually opening size and how much glass you want — French doors typically top out at a more modest total width per pair than a multi-panel sliding system can achieve.

Heavy-duty adjustable hinges rated for the door's weight, correctly torqued at installation, are the main defense — most misalignment issues over time come from hinges that were undersized for the door's weight to begin with, not from humidity itself. Adjustable hinges also let a technician re-true the door's alignment years later without replacing the whole unit.