Double-Hung vs Casement Windows: Which Is Right for Your LI Home?

Double-hung and casement windows are the two most popular window styles installed in Long Island homes. They look different, operate differently, and each has distinct advantages depending on the room, your home's architecture, and your priorities. This guide will help you decide which type—or which combination—makes the most sense for your home.

How Each Window Type Works

Double-Hung Windows

A double-hung window has two operable sashes that slide vertically within the frame. Both the top and bottom sash can move up and down. Most modern double-hungs feature tilt-in sashes—you can tilt the sash inward for easy cleaning from inside, which is a significant advantage for second-floor windows.

Double-hung windows are the default choice in most Long Island homes. If you drive through Levittown, Massapequa, Hicksville, or any post-war suburb, nearly every home was built with double-hung windows. They suit the traditional aesthetic of capes, colonials, ranches, and split-levels.

Casement Windows

A casement window is hinged on one side and swings outward (like a door) using a crank handle at the base. When fully open, the entire window aperture is unobstructed, providing maximum ventilation. When closed, the sash presses against the frame under compression, creating one of the tightest seals of any window type.

Casement windows are common in contemporary and mid-century modern homes, but they also work well in traditional Long Island homes when paired with appropriate grid patterns.

Head-to-Head Comparison

Energy Efficiency: A Closer Look

For Long Island homeowners focused on energy savings, casement windows have a measurable edge. The compression seal formed when the sash closes against the frame under crank pressure creates a tighter barrier against air infiltration than the sliding mechanism of a double-hung.

In testing, casement windows typically achieve air infiltration rates 25–35% lower than comparable double-hungs from the same manufacturer. On Long Island, where we experience both harsh nor'easters in winter and humid coastal summers, that tighter seal translates to noticeable comfort and energy savings.

That said, modern double-hung windows with dual weatherstripping and interlocking meeting rails have closed the gap significantly. A high-quality double-hung with a good glass package will still outperform an older casement window.

Best Room Applications

Where Double-Hung Windows Shine

• Bedrooms: The classic look suits traditional Long Island bedroom architecture, and the tilt-in cleaning feature is practical for second-floor bedrooms.
• Street-facing facades: Double-hungs maintain the traditional curb appeal that Nassau and Suffolk County neighborhoods expect.
• Windows above walkways or decks: No outward swing means no risk of hitting someone walking by.
• Rental properties: Simpler mechanism means fewer maintenance calls. No crank handles to break.
• Historic districts: If your home is in a designated historic area (parts of Garden City, Sea Cliff, Oyster Bay), double-hung replacements typically meet preservation guidelines more easily.

Where Casement Windows Shine

• Kitchens (above the sink): The crank handle is much easier to operate when reaching over a countertop than trying to slide a double-hung sash up.
• Bathrooms: Maximum ventilation to clear steam, and the multi-point lock provides excellent privacy-glass security.
• Basement and above-grade openings: Casements paired in groups can satisfy egress requirements with their full-open design.
• Rooms facing prevailing winds: On the South Shore, casement windows facing the ocean can catch cross-breezes that a double-hung partially blocks.
• Contemporary or modern renovations: Clean lines and minimal sightlines suit updated aesthetics.

The Mix-and-Match Strategy

Most of the whole-house replacement projects we complete on Long Island use a combination of both types. A common configuration:

• Double-hung windows on the front and side facades for traditional curb appeal
• Casement windows in the kitchen and bathrooms for ventilation and ease of use
• A bay or bow window in the living room or dining room as a focal point
• Picture (fixed) windows flanked by casements or double-hungs for large openings

As long as the frame material and color are consistent, mixing window types looks cohesive and lets you optimize each room's performance.

Durability and Maintenance on Long Island

Long Island's coastal environment is tough on windows. Salt air accelerates corrosion on hardware, and nor'easters drive rain horizontally against frames and seals. Here is how each type holds up:

• Double-hung sash balances: Modern constant-force balance systems are durable and rarely need replacement. Older spiral balances may weaken after 15–20 years, making the sash hard to keep open.
• Casement crank operators: The folding arm operator is the most common failure point. Expect to replace the crank operator once in the window's lifetime (approximately $50–$100 for parts and labor). Annual lubrication with silicone spray prevents most issues.
• Weatherstripping: Both types use replaceable weatherstripping. Plan on replacing it every 10–15 years for optimal performance.

Our Recommendation

There is no universally "better" window type—only the right type for each application. If we had to pick one default for a typical Long Island home, we would lean toward double-hung for most rooms because of their traditional appearance, easier cleaning, and lower cost. But we always recommend casements in kitchens, bathrooms, and any room where maximum ventilation and energy efficiency are top priorities.

The best approach is to walk through your home room by room and consider how you use each window. That is exactly what we do during our free in-home estimates—we recommend the right window type, size, and glass package for each opening based on the room's function, orientation, and your budget.