Double Casement Windows: French, Push-Out and Crank-Out Options Explained

Double casement windows are two side-hinged sashes in one frame that open outward from the middle, like a pair of small doors. When the two sashes meet with no fixed post between them, the window is usually called a French casement, and opening both gives a wide, completely clear opening. Double casements can be crank-out or push-out, and impact-rated versions are available for Florida homes, though often in a narrower range of sizes than single casements.

For the basics of how casements work and how they compare with other styles, see our pillar guide to casement windows in Florida. This article covers the two-sash variations.

Types of Double Casement Windows

Mullioned pair

Two separate casement sashes, each in its own frame section, joined by a fixed center mullion. Each sash latches against the mullion. This is the most common and usually the strongest configuration, because the mullion carries part of the wind load.

French casement (no center post)

The two sashes close against each other with no fixed post. Typically one sash closes first and the second overlaps or latches to it, with locking points at the top and bottom. With both open, nothing interrupts the view or the airflow. The trade-off is that the meeting point must handle wind load without a post, which can limit maximum sizes and design pressure ratings.

Casement pair with picture window

Two operable casements flanking a fixed center pane. Technically not a double casement, but often quoted that way. It gives a big view with airflow on both sides.

Push-Out vs Crank-Out Windows

Casement sashes open one of two ways:

• Crank-out windows use a rotary operator. Turning the handle moves an arm that pushes the sash open and pulls it closed. Easy to reach over a counter or sink, and the sash stays exactly where you set it.
• Push-out casement windows have no crank. You turn a handle to unlock and push the sash open by hand; a friction hinge or limiter holds it in position. The look is cleaner and more traditional, and there are fewer mechanical parts to wear.

Quick comparison:

• Reach: crank-out wins over sinks and deep sills; push-out needs an arm's-length reach.
• Look: push-out is cleaner inside, with only a handle.
• Wear parts: crank-out has an operator gear that can strip; push-out relies on hinges and friction settings.
• Wind: a crank holds the sash firmly against gusts while open; push-out sashes rely on the hinge friction or a stay.
• Screens: both typically use interior screens. Some push-out designs use retractable screens.

Push-out French casements are a classic look on Mediterranean and Spanish-style homes, which are common across Southwest Florida.

Pros and Cons of Double Casement Windows

Pros

• Very wide ventilation and a strong cross-breeze when paired with windows on another wall.
• French versions give an unobstructed view and opening.
• A large clear opening often helps a bedroom meet egress size.
• Tight compression seal, like other casements.

Cons

• Two sashes swinging out need clearance from walkways, lanai screen enclosures, landscaping and shutters.
• French versions without a mullion may have lower approved sizes or design pressures.
• More hinges, locks and operators to maintain than a single sash.
• Higher cost than a single casement or a hung window of similar width.

Impact Double Casements and Florida Code

In the wind-borne debris region defined by the Florida Building Code, 8th Edition (2023), every glazed opening needs impact-rated glass or an approved shutter. Impact double casements exist in both mullioned and French configurations from several manufacturers. What to check:

1. Product approval for the configuration. A Florida Product Approval or Miami-Dade NOA covers specific sizes and configurations. A French casement and a mullioned pair from the same line may have different approved sizes. Verify the current approval for the exact unit.

2. Design pressure. The rated pressure must meet the requirement for that opening. Wider units and corner locations see higher loads.

3. Mullion rating. If two units are joined, the mullion itself must be rated for the load. Our sibling article on vinyl casement windows explains how frame material affects size limits too.

4. Locking. Both sashes must be fully latched for the window to perform as tested. Make it part of your storm-prep routine.

5. HOA approval. Grid patterns, colors and the French-style look may need architectural review.

Double Casement Windows Cost

Typical 2026 installed pricing in Southwest Florida:

• Impact double casement: a double casement is usually priced as one wide opening. Expect the upper part of the $1,200–$3,800 per opening impact range, and above it for very wide or custom French units.
• French casement premium: French configurations without a mullion typically cost more than a mullioned pair of the same size because of the extra locking hardware.
• Non-impact versions: lower window cost, but they need approved shutters in the wind-borne debris region.

Costs rise with size, design pressure, glass package, hardware finish and the condition of the opening. Enlarging an opening in a block wall to fit a wider pair adds lintel, stucco and engineering work.

Where Double Casements Work Best

• Kitchens over the sink, with crank-out operators for easy reach.
• Bedrooms that need a large egress opening in a short wall.
• Living rooms facing the prevailing breeze, especially paired with a fixed center pane.
• Mediterranean or Spanish-style homes, where push-out French casements suit the architecture.

Avoid them where an open sash would swing into a walkway, pool deck traffic or a lanai screen wall.

Planning Clearance, Screens and Storm Prep

Before ordering, stand outside the opening and picture both sashes fully open. Each sash projects roughly its own width away from the wall, so a pair of 24-inch sashes needs about two feet of clear space in front of the window. Check for:

• Hedges, palms and irrigation heads that would block or scratch the sash.
• Lanai screen walls or pool cages that sit close to the house.
• Existing accordion or roll-down shutters on nearby openings whose tracks could interfere.
• Exterior lights, hose bibs and downspouts in the swing path.

Inside, the screens sit on the interior, and on a crank-out pair the operator handles need room on the sill. Many homeowners choose fold-down crank handles so blinds or shades can hang close to the glass. Finally, add the window to your storm checklist: close both sashes, engage every locking point and confirm the handles are fully seated.

Frequently Asked Questions

What is the difference between double casement and French casement windows?

Double casement usually means any two casement sashes in one opening. A French casement is a double casement with no fixed center post, so the sashes meet each other and open fully.

Are push-out casement windows secure?

Yes, when they have multi-point locks. Security and storm performance depend on the locking hardware and on keeping the sashes latched.

Can French casement windows be impact-rated?

Yes, several manufacturers offer impact French casements. Approved sizes may be smaller than mullioned pairs, so verify the approval for your opening.

Are crank out windows hard to maintain?

Not usually. Lubricate the operator and hinges once or twice a year, and replace a stripped operator if the crank spins freely. Coastal homes benefit from stainless or coated hardware.

Do double casements meet egress?

Often, because the full sash opens. Check the manufacturer's egress chart for the clear opening of each sash and the sill height in the room.

Bottom Line

Double casement windows deliver a wide view and maximum airflow. Choose a mullioned pair for strength and larger sizes, a French casement for a fully open look, and push-out or crank-out operation based on reach and style. In Florida, confirm the approval covers the exact configuration.

Want to see options for your openings? Explore our impact windows and doors service and call Prestigious Home Improvements at (941) 223-4875 for a free in-home estimate.