Key takeaways
- French doors open the full width of the doorway; a standard slider only opens about half.
- Sliders need no swing space, which makes them ideal where furniture sits close to the door.
- Outswing French doors seal especially well against wind-driven rain.
- Both are available impact-rated with Low-E and privacy glass.
The door between your family room and the lanai gets more use than almost any other opening in a Florida home. When it is time to replace it, the first decision is usually the biggest: keep a sliding glass door, or switch to French doors? Here is how they compare.
How they work
- A sliding glass door has one or more panels that glide on a track past fixed panels. A standard two-panel slider has one fixed and one moving panel.
- French doors are hinged glass doors, usually in pairs, that swing open and meet in the middle when closed.
Opening width
French doors win. Open both leaves and the entire doorway is clear — ideal for entertaining, carrying trays to the pool and moving furniture. A two-panel slider only ever opens about half the doorway, because one panel stays in place. (If you want a wider slider opening, look at three- and four-panel configurations or a multi-slide system.)
Space
Sliders win. Panels slide within the frame, so furniture can sit right up to the glass. French doors need clear floor space for the leaves to swing — inside for inswing doors, or on the lanai for outswing doors.
Weather sealing
French doors have an edge, especially outswing French doors. When a hinged door closes, it compresses its weatherstripping; when wind pushes on an outswing door, it presses the door harder into the frame. Sliders rely on the sill design and weather-stripping along sliding panels. A quality slider with a well-designed sill still performs very well, particularly under a covered lanai.
Security
Modern versions of both are secure. Quality French doors use multipoint locks that bolt into the head and sill, and outswing doors use non-removable hinge pins. Modern sliders use multipoint locks and anti-lift features — a big step up from older sliders with a single latch.
Style
French doors bring a classic, architectural look — perfect for traditional, Mediterranean and colonial homes, especially with divided-lite grilles. Sliders offer a cleaner, more contemporary look and more uninterrupted glass.
Cost
A standard two-panel slider is usually the less expensive option. French doors of comparable quality typically cost somewhat more, and converting from a slider may require reframing, stucco and drywall work. Large sliders and multi-panel systems can cost more than a French door pair.
Quick comparison
| Sliding glass door | French doors | |
|---|---|---|
| Opening width | About half the doorway (2-panel) | Full doorway |
| Swing space needed | None | Inside or outside |
| Weather seal | Good with a quality sill | Excellent, especially outswing |
| Look | Clean, contemporary | Classic, architectural |
| Relative cost | $ – $$$ | $$ – $$$ |
Which should you choose?
Choose a slider if furniture sits close to the door, you want maximum glass and view, or you are working with a tight budget.
Choose French doors if you want the full width open for entertaining, you love the traditional look, or the opening faces weather and you have room for outswing doors on the lanai.
Can’t decide? Sliding French doors combine the wide stiles and grilles of French doors with the space-saving operation of a slider — though they still open only half the width.
Converting a slider to French doors
This is one of the most common patio door projects in Central Florida. Because standard French door sizes rarely match existing slider openings exactly, the job usually includes adjusting the opening, flashing and setting the new unit, then finishing the stucco, drywall and trim. We quote all of that up front so there are no surprises.
Frequently asked questions
Are French doors more expensive than sliding doors?
Comparable-quality French doors usually cost somewhat more than a two-panel slider, and converting from a slider may add reframing. Large multi-panel sliders can cost more than a French door pair.
Which is more energy efficient?
Both can be very efficient with Low-E glass and good weatherstripping. Hinged French doors compress their seals when closed, which gives them an edge in air tightness.
This guide is general information for Central Florida homeowners, not engineering or legal advice. Code requirements, product approvals and insurance credits depend on your specific property — we confirm them for your home during the estimate.