Most homeowners don’t think about window style until they’re already in the quote process — and at that point, the decision tends to get defaulted to “whatever you recommend.” That’s not a bad instinct, but it means making a choice that affects ventilation, cleaning, and energy performance without fully understanding the trade-offs first.
Casement and double hung are the two most common residential window types in the Triangle area. The choice between them comes up on nearly every full-home replacement we do, and the answer almost always depends on where in the home the window lives — not which type is objectively superior. There isn’t one. But there are wrong applications for each.
Here’s the comparison that actually matters.
What’s the Difference Between Casement and Double Hung Windows?
Casement windows are hinged on the side and crank open outward. Double hung windows have two vertically sliding sashes — you can open the top, bottom, or both. Casements typically seal tighter and ventilate more efficiently; double hungs are easier to clean and more common in traditional home architecture.
That’s the core distinction. The full difference comes down to how each window opens and what that means for daily use.
A casement opens like a door — turn a crank at the bottom of the frame and the entire sash swings outward. The full window area opens to airflow, and when cranked shut, the sash presses against a compression gasket, creating a very tight seal. Double hung windows slide vertically. You raise the lower sash, lower the upper sash, or do both — but at any given position, roughly half the window’s total area is ventilating at once.
Both types are available in vinyl, fiberglass, wood, and composite. Both work as insert replacements in existing rough openings. The operating difference is what drives everything else in this comparison.
When Casement Windows Are the Better Choice
If energy performance is a priority, casements have a clear advantage in NC’s climate. The compression seal — where the sash presses against the gasket when cranked shut — is tighter than the sliding sash mechanism on a double hung. In Raleigh’s hot, humid summers, that seal quality translates directly into lower cooling costs. A window that doesn’t seat firmly puts measurable load on the HVAC system in July and August.
Casements also move more air. Because the full window opening faces the breeze, a single casement ventilates more effectively than a double hung of the same size. In rooms where cross-ventilation matters — a bedroom on the upper floor, a bathroom without a ceiling fan — that’s a real difference.
They’re the practical choice for hard-to-reach locations. A window above a kitchen sink, above built-in cabinetry, or at the end of a counter run is far easier to operate with a crank than by reaching in to push up a sash. This is one of the most common reasons we recommend casements for kitchen upgrades across Triangle-area homes.
Architecturally, casements are increasingly standard in contemporary and modern home styles. If a Raleigh-area home was built after 2010, or is going through a significant renovation with updated finishes, casements are often the better visual fit.
When Double Hung Windows Are the Better Choice
The single most practical reason to choose double hung: screens.
Double hung windows use interior screens — they sit inside the frame year-round and don’t require removal to open the window. Casements use exterior screens, mounted on the outside of the unit. Every time you open a casement, you’re either removing the screen first or skipping ventilation. For rooms where you open windows daily, this creates more friction than most homeowners anticipate.
Cleaning is the second advantage. Most modern double hung windows have tilt-in sashes — both sashes tilt inward so you can clean the exterior glass from inside the house. No ladder, no window washing service required. On second-story windows, this is a meaningful practical benefit. Casement windows require reaching around the outside of the frame or cleaning from a ladder.
Double hung windows are also the right call for rooms near walkways, patios, decks, or anywhere the outward swing of a casement would interfere with foot traffic or outdoor furniture. A casement opening over a front walkway or a deck with patio furniture is an ongoing inconvenience.
For 1990s-2000s Triangle-area homes built in traditional architectural styles — the majority of the housing stock in Cary, Wake Forest, and Morrisville — double hung windows are typically the right stylistic fit. A casement in a rough opening designed for a double hung can look architecturally inconsistent, and getting it right requires additional trim work.
Casement vs. Double Hung — At a Glance
The table below covers the main decision points. Most full-home replacement projects use both types — casements in main living areas and bedrooms, double hungs in kitchens and rooms near exterior walkways or patios.
| Feature | Casement | Double Hung |
| Energy Seal | Compression gasket — very tight when cranked shut | Sliding sash — good, not as airtight |
| Ventilation | 100% of the opening — full-pane airflow | ~50% of the opening at a time |
| Cleaning | Requires ladder or exterior reach | Tilt-in sashes — exterior glass cleaned from inside |
| Screens | Exterior screens (must remove to open window) | Interior screens — stay in place year-round |
| Exterior Clearance | Requires outward swing space | No exterior clearance needed |
| Relative Cost | Slightly higher ($50–$150 more per unit) | More affordable at entry level |
| Best Architectural Fit | Contemporary, modern — newer Triangle builds | Traditional — 1990s–2000s subdivisions |
What NC’s Climate Means for This Decision
NC’s combination of hot summers, high humidity, and occasional hard freezes creates specific priorities that favor casements on energy performance — but require some practical consideration.
The seal advantage of a casement is meaningful here. Raleigh summers are long and hot, and a window that doesn’t seat tightly adds real HVAC load from June through September. On energy performance alone, casements win this comparison.
The practical caveat: NC gets fast-moving summer thunderstorms. If you habitually leave windows open in the evening, closing a casement requires a deliberate crank. A double hung sash can be shut in one motion. It’s a minor thing, but it’s the most common complaint we hear from homeowners who switched types.
Homes built in the 1990s and early 2000s — the dominant housing stock in Cary, Apex, Wake Forest, and Knightdale — were designed around double hung proportions. Replacing with casements is entirely doable but requires planning around interior trim and finish work, particularly at the sill. If you’re weighing that tradeoff, it’s worth talking through with a contractor who specializes in window installation in North Raleigh before you commit to a product line.
One more practical note: some HOAs in Triangle-area neighborhoods restrict exterior appearance changes, including window style switches. Confirm with your HOA before ordering if you’re changing from double hung to casement in a planned subdivision.
Replacing windows in your Raleigh-area home and not sure which type makes sense room by room? Blue Chip walks through the decision with you before the quote — no pressure either way. Call (919) 296-5966 or request a consultation online.
Frequently Asked Questions
What is better, casement or double hung windows?
Neither is universally better — it depends on where the window is in the home and the architectural style. Casements outperform on energy efficiency and ventilation. Double hungs win on cleaning convenience, screen access, and fit for traditional home styles. Most full-home replacement projects use both: casements in main living areas and bedrooms, double hungs in kitchens, bathrooms, and rooms near walkways.
Are casement windows more expensive than double hung?
Slightly. Casements run $50–$150 more per unit on average, primarily due to the hinge and crank hardware. Installation cost for insert replacements is similar. The energy performance of a well-sealed casement can offset that price difference over time in NC’s climate, particularly on south- and west-facing windows.
Can you replace double hung windows with casement windows?
Yes, with some planning. The rough opening is the same size — the window unit is swapped. You’ll need to adjust interior trim work at the sill and sides, and verify that the exterior clearance accommodates the outward swing. Blue Chip handles this type of swap regularly on Raleigh-area renovation projects — it’s straightforward when accounted for upfront.
Do casement windows work with standard window screens?
Casements use exterior screens — mounted on the outside of the window — rather than the interior screens used on double hungs. Exterior screens are functional but must be removed to operate the window and are harder to maintain. This is one of the most common practical reasons homeowners choose double hung for kitchens and high-traffic rooms.
Making the Right Choice for Your Home
The casement vs. double hung decision isn’t about which window is better overall — it’s about matching each window to how it will actually be used. Casements belong in rooms where you want maximum energy performance and ventilation without concern about exterior clearance or screen access. Double hungs belong in rooms where cleaning convenience, interior screens, and architectural fit take priority.
Most replacement projects in the Triangle area end up with a mix of both — and that’s usually the right answer. When we scope a window replacement, we walk through each room and make recommendations based on application, not type preference.
Ready to figure out what fits your home? Blue Chip Window & Door serves Raleigh, Cary, Apex, Wake Forest, Morrisville, Knightdale, and surrounding areas. Call (919) 296-5966 for a free in-home consultation and estimate.