Casement vs. Double-Hung Windows: Which Should You Choose?
Written by the LehighValleyWindows.com editorial team ·
Casement or double-hung is the most common style decision in a window project, and the honest answer is that most Pennsylvania houses end up with both — double-hungs where the traditional look matters, casements where sealing and reach matter. Here’s how the two styles actually differ in daily life, so you can put each one where it earns its place.
Get a free quote from a vetted local window pro
One local expert, one call, one free in-home assessment — your info is never sold to a list of contractors.
- Free in-home assessment
- One vetted local pro
- No pressure, no spam
How each one works
A double-hung has two sashes that slide vertically past each other; most modern versions tilt inward for cleaning. A casement is hinged at the side and cranks outward like a small door, opening the entire glass area.
That mechanical difference drives everything else: sliding sashes seal by brushing against weatherstripping, while a casement pulls itself tight against compression seals when you latch it — the same principle as a refrigerator door.
Sealing and drafts: casement takes this round
Because the casement sash compresses into its gaskets, it’s the tightest-sealing operable window design — and it actually seals harder as wind pushes against it. On exposed, windy, or north-facing walls, that difference is something you feel in January.
Quality double-hungs seal well too, and the gap has narrowed with modern weatherstripping and cam locks that pull the sashes tight. But if maximum airtightness on a brutal wall is the goal, the casement wins on physics.
Ease of use: it depends on your hands and the location
For openings over a kitchen counter or sink, the casement crank is the clear winner — no leaning and lifting, just a few easy turns. Cranks are also gentler for arthritic hands than lifting a heavy sash.
For easy cleaning from indoors, the tilt-in double-hung wins: both sashes wash from inside the room, no ladder. Casements clean from inside only if the hinge design leaves a gap to reach around — ask about “wash-mode” hinges. Try both mechanisms in person before deciding; two minutes of hands-on beats any spec sheet.
Looks and ventilation
Double-hungs are the traditional Pennsylvania look — colonials, farmhouses, row homes, and most older housing were built around them, and grille patterns suit them naturally. Casements read cleaner and more contemporary, with unbroken glass and slimmer sightlines.
For airflow, a casement opens 100% of its area and can scoop passing breezes like a sail. A double-hung opens at most half its area, but it offers a trick casements can’t: opening the top sash only, for ventilation that’s secure and out of children’s reach.
Cost, and the case for mixing
Casements typically price modestly higher than double-hungs of the same size — more hardware, more sealing. Across a whole house the difference is real but rarely decisive.
The practical answer for most projects: double-hungs across the front and in bedrooms for the classic look and easy cleaning, casements over the kitchen sink, in stairwells, and on the windiest wall. A good local expert will suggest a mix like this unprompted — it’s a sign you’re dealing with someone specifying for your house rather than upselling a catalog page.
FAQ
Which is more energy efficient, casement or double-hung?
With the same glass package, the casement has the edge because its compression seal is tighter than any sliding seal — and it seals harder under wind load. A quality double-hung is close behind and plenty for sheltered walls.
Are casement windows harder to maintain?
The crank mechanism is the one extra moving part, and on quality hardware it lasts decades. Screens sit on the interior side, which some people prefer — they stay cleaner and are easier to remove.
Can I mix casements and double-hungs on the same house?
Yes, and most well-specified projects do. Keep the same frame color and glass package for a consistent look, and put each style where it works best — casements at hard-to-reach and windy spots, double-hungs where tradition and tilt-in cleaning matter.
Do casements work with window air conditioners?
Not with standard units — a casement opening is the wrong shape. Narrow vertical casement AC units exist but cost more. If a room depends on a window AC, keep a double-hung or slider there.
Get a quote for your own house
Guides explain what to look for. The number that matters is measured at your windows — free, in writing, from one vetted local pro.
By region
By town
More guides
- The Best Time of Year to Replace Windows in Pennsylvania
- Paying for New Windows: Financing, Rebates & What to Ask
- How Long Do Windows Last? Lifespan by Frame Material
- Window Warranties Explained: What “Lifetime” Actually Covers
- 10 Questions to Ask Before You Sign a Window Contract
- How to Choose a Replacement Window Brand (Without the Hype)
- Is There a Window Tax Credit in 2026? What Changed (and What Still Helps)
- Window Repair vs Replacement: When Fixing One Is Enough
- All 34 guides →
- Compare window styles & frame materials →
- How we vet the contractors we send →
Get a free quote from a vetted local window pro
One local expert, one call, one free in-home assessment — your info is never sold to a list of contractors.
- Free in-home assessment
- One vetted local pro
- No pressure, no spam