So, you’re thinking about getting new windows for your home, but you aren’t sure which style to choose. You could always replace like with like — pulling out an old double-hung and dropping a new double-hung right back into the opening. It’s simple, it’s predictable, and sometimes it’s exactly the right call.

But it’s worth asking the bigger question first: is the window style you have actually the window style you want? Swapping in a different configuration can refresh your home’s curb appeal, improve energy efficiency, make a hard-to-reach window easier to operate, or finally give you the unobstructed view you’ve been wishing for.

At Great Glass, we fabricate, temper, and install glass every day, so we see firsthand how much the right window style changes a space. Here’s an honest look at the most common options, what each one does well, and where each one falls short.

Double-Hung Windows

Double-hung windows are the classic American window. Two sashes sit in a single frame, and both slide vertically. Most modern versions also tilt inward, which makes cleaning the exterior glass from inside the house genuinely easy.

Best for: Traditional and colonial-style homes, bedrooms, living rooms, and anywhere you want a familiar, timeless look.

Strengths: Excellent ventilation control — open the top sash to let warm air escape and the bottom sash to draw cool air in. Easy to clean. Works well with window air conditioning units. Widely available in nearly every size and finish.

Trade-offs: Because both sashes move, there are more seals and moving parts than a fixed window, so they’re generally not quite as airtight as casements. The center meeting rail also splits your view in half.

Single-Hung Windows

A single-hung window looks nearly identical to a double-hung, but only the bottom sash moves. The top sash is fixed in place.

Best for: Budget-conscious projects, upper-story windows you rarely open, and homes where you want the traditional look without the extra cost.

Strengths: Typically less expensive than double-hung windows. Fewer moving parts means fewer points of air infiltration and less long-term maintenance.

Trade-offs: Harder to clean the exterior of the upper sash — you’ll need a ladder. Less ventilation flexibility.

Casement Windows

Casement windows are hinged on one side and swing outward, operated by a crank. They’ve become increasingly popular in modern and transitional homes, and for good reason.

Best for: Energy efficiency, hard-to-reach spots like over a kitchen sink, and homes in windy areas where you want to catch a breeze.

Strengths: When a casement closes, the sash presses tight against the frame, creating one of the best air seals of any operable window style. The full sash opens, so you get maximum ventilation. The crank mechanism makes them easy to operate even when you have to reach across a counter.

Trade-offs: The outward swing needs clearance — not ideal next to a walkway, patio, or deck. The crank hardware can wear over time and eventually needs replacement. Window AC units aren’t compatible.

Awning Windows

Awning windows hinge at the top and swing outward from the bottom, creating a small “awning” over the opening.

Best for: Basements, bathrooms, and pairing above or below larger fixed windows.

Strengths: You can leave them open during light rain without water getting in. They provide good ventilation and privacy at the same time, which is why they work so well in bathrooms. Like casements, they seal tightly when closed.

Trade-offs: Limited sizing options. The outward swing creates the same clearance issues as casements, and a low-mounted awning window can be a head-bump hazard near a walkway.

Sliding (Gliding) Windows

Sliders move horizontally along a track, with one or both sashes operable.

Best for: Wide openings, contemporary homes, basement egress, and rooms that need a broad, low-profile view.

Strengths: Simple operation with no cranks or springs to fail. Great for wide, short openings where a hung window wouldn’t fit well. Generally affordable and low-maintenance.

Trade-offs: Only half the opening can be open at once. The bottom track collects dirt and debris, so they need periodic cleaning to glide smoothly.

Picture Windows

Picture windows don’t open at all — they’re a single fixed pane of glass in a frame.

Best for: Showcasing a view, flooding a room with natural light, and maximizing energy performance.

Strengths: With no moving parts and no seams where sashes meet, picture windows are the most energy-efficient and airtight option available. They also deliver the largest expanse of uninterrupted glass, and frames can be slimmer since they don’t have to support operating hardware.

Trade-offs: No ventilation. Building codes require operable egress windows in bedrooms and certain other rooms, so a picture window can’t stand alone in those spaces. Large panes should also be evaluated for safety glazing requirements.

Bay and Bow Windows

Bay windows combine a large center pane with two angled side units, projecting outward from the wall. Bow windows use four or more panes in a gentle curve.

Best for: Adding architectural interest, creating a window seat or plant shelf, and making a room feel larger.

Strengths: Dramatic curb appeal and interior impact. They bring in light from multiple angles and add usable interior space.

Trade-offs: The most expensive option, and the most involved to install. They require structural support and careful flashing to prevent leaks — this is not a DIY project.

Specialty and Custom Shapes

Arched, round, triangular, trapezoidal, and transom windows don’t usually serve as a home’s primary glazing, but they do enormous work for architectural character. They’re typically fixed units, and they’re where custom glass fabrication really earns its keep.

What Actually Determines “Best”

There’s no single winner in this comparison — the best window style is the one that fits your opening, your climate, your home’s architecture, and how you actually live. When homeowners come to us, we walk through four questions:

How will you use this window? A window you open daily has different needs than one you’ll never touch. Prioritize operation and reach for the former, and energy performance and view for the latter.

What’s the exterior clearance? Casements and awnings swing out. If there’s a deck, walkway, or dense landscaping on the other side of the wall, a slider or hung window is the smarter choice.

What does the room require by code? Bedrooms need egress-compliant operable windows with minimum opening dimensions. Glass near doors, in bathrooms, close to the floor, or in large panes generally requires tempered safety glass. This is where a lot of well-intentioned projects go sideways — and where working with a shop that fabricates and tempers its own glass makes a real difference.

What’s your energy priority? In order of typical air-sealing performance: fixed picture windows, then casements and awnings, then double-hung and sliders. But glass package matters just as much as style. Low-E coatings, argon gas fills, warm-edge spacers, and the right number of panes for your climate can outweigh the style difference entirely.

The Glass Matters as Much as the Style

It’s easy to get caught up in frame configuration and forget that the glass itself is doing most of the work. A picture window with a single pane of clear glass will underperform a double-hung with a quality insulated, Low-E unit every single time.

This is the part of the conversation we care about most at Great Glass. We fabricate insulated glass units, cut and temper glass in-house, and handle everything from a single replacement pane to full custom shapes that no stock catalog carries. When a homeowner needs a tempered unit for a low-sill window, an oversized fixed pane for a great room, or a hard-to-source arched insert for a historic facade, we build it rather than order it and wait.

That also means if you’ve got a window with a failed seal, a cracked pane, or fogged glass between the panes, you may not need a whole new window at all. In plenty of cases, replacing the insulated glass unit inside your existing frame restores performance at a fraction of the cost of a full-frame replacement.

Mixing Styles Is Allowed

One last thing worth saying plainly: you don’t have to pick one style for the whole house. Some of the best results we see combine them thoughtfully — casements flanking a large picture window in the living room, awning windows high on a bathroom wall for privacy, sliders in a basement for egress, and double-hungs across the front elevation to keep the street-facing look consistent.

The key is intentionality. Consistency on the front facade preserves curb appeal. Function-driven choices in the back and interior rooms make daily life better. Both can be true at once.

Let’s Figure Out What Fits

If you’re weighing window styles for a project, we’re happy to talk it through — including the parts most people don’t think about, like glazing requirements, tempering, sizing for custom openings, and whether a glass-only replacement makes more sense than a full window swap.

Contact Great Glass to discuss your project. Whether you need a single custom pane or glass for an entire home, we’ll fabricate it right and install it clean.