Andersen & Pella Replacement Specialty Windows in Pittsburgh, PA
Specialty windows are the perfect way to add architectural character, bring in more natural light, and create a custom look you can’t get with standard window styles. At Window Installation Specialists, we install premium Andersen and Pella specialty replacement windows for homeowners throughout the Pittsburgh area—built to match your home’s design while improving comfort and efficiency.
Whether you’re replacing an arched window over a front entry, adding a dramatic round-top in a living room, or designing a one-of-a-kind window combination, we help you choose the right product line and install it with precision.
Call for a Free On-Site Estimate: (724) 446-0275
What Are Specialty Windows?
Specialty windows are custom or non-standard shapes designed for unique architectural needs. Common specialty shapes include:
- Half-round and full round (circle)
- Elliptical / oval
- Arched / round-top
- Trapezoid
- Triangle
- Octagon
- Eyebrow and radius shapes
- Custom geometric designs
These windows are often installed as fixed picture windows for maximum glass and clean lines, but they can also be paired with operable units like casements for added ventilation.
Why Homeowners Choose Specialty Replacement Windows
- Create a custom, high-end architectural look
- Add natural light to stairwells, entries, and vaulted spaces
- Improve curb appeal, especially above doors and front elevations
- Pair beautifully with other windows for dramatic designs
- Available with energy-efficient glass packages
Popular Specialty Window Styles We Install
Fixed Specialty Picture Windows
A clean, modern look that maximizes glass area—ideal for arches, circles, trapezoids, and statement windows.
Specialty Window Combinations
- Round-top over double-hungs
- Trapezoids above picture windows
- Arched units paired with casements
- Multi-panel assemblies for vaulted great rooms
Specialty Casement Variations
Options such as French casement and tilt-turn designs for unique functionality and premium appeal.
Top Specialty Window Options by Brand
Andersen Specialty Windows
Andersen E-Series Specialty Windows
Best for maximum customization. Ideal for very specific sizes, shapes, colors, grille patterns, and interior wood options.
- Wide range of specialty shapes and custom sizing
- High-end finishes and hardware
- Perfect for statement windows and custom assemblies
Andersen A-Series Specialty Windows
Best for premium performance and architectural style.
- Built for high performance and durability
- Ideal for upscale homes
- Excellent for large fixed specialty windows
Andersen 400 Series Specialty / Picture Windows
Best for reliability and value.
- Consistent whole-home replacement option
- Classic appearance and proven performance
- Strong Fibrex® material for large glass areas
Pella Specialty Windows
Pella Reserve® Specialty Windows
- Luxury appearance and customization
- Ideal for focal-point windows
- Perfect for upscale renovations
Pella Architect Series® Specialty Windows
- Classic design compatibility
- Strong efficiency upgrades
- Great for arches and round-top windows
Pella Lifestyle Series® Specialty Shapes
Ideal for comfort upgrades and everyday value with flexible specialty configurations.
Specialty Window Glass & Efficiency Options
- Low-E coated glass
- Double- or triple-pane options
- Argon gas fills
- Privacy and decorative glass
Our Specialty Window Replacement Process
- On-site consultation and measurements
- Brand and series selection
- Professional removal and preparation
- Proper structural support and sealing
- Final walkthrough and quality check
Service Areas Near Pittsburgh
Pittsburgh, Allegheny County, Westmoreland County, Beaver County, and Butler County.
Call Now for a Free Estimate
Window Installation Specialists
Phone: (724) 446-0275
Email: makish@ncconnect.net
Address: 1968 Mars Hill Rd., Irwin, PA 15642
HIC#: PA003223
French Casement Window
The French casement window has two sashes that crank out for twice the ventilation and an unobstructed view. Features Pella’s fold-away casement cranks that won’t get in the way of room side window treatments. And one easy-to-reach handle on the sill locks both sashes securely.
Push Out Casement Window
The push out casement window opens easily with just the turn of a handle and a gentle push. It’s shown in the Traditional style, with a wide wood sash frame and historical stay that holds the window open as wide as you want. Or choose the Contemporary version, with a narrower frame to complement other windows in your home.
Push Out French Casement Window
The push out French casement window has two sashes that swing open from the center quickly and smoothly with a gentle push, providing an unobstructed view. It features matching handles, traditional wide wood sash frames and historical stays that hold the window open as wide as you want.
In-Swing Casement Window
The in-swing casement window opens into your room, instead of out. Simply turn the handle and pull. It’s ideal for places where a swing-out sash would get in the way, such as above a flower box or next to a walkway.
In-Swing French Casement Window
In-Swing French casement windows feature two sashes that pull open into your room, instead of swinging out and into your outdoor space. Unlike standard 2-wide casement windows, this style provides a completely unobstructed view.
Tilt-Turn Window
Tilt-turn windows offer European styling and dual functionality. The sash opens two ways, giving you ventilation flexibility. Simply turn the handle 90 degrees to swing the window sash open into your room for a clear view and a full breeze. Or, if you want just a little fresh air, a 180-degree turn of the handle tilts the sash in to vent from the top.
Why choose Acclaim™ Specialty windows?
- CONVENIENCE – Ideal for letting in light in hard-to-reach spaces or creating a unique look. Low-maintenance design makes it the ideal window to simply relax and enjoy the view.
- COMFORT – Strong, full-perimeter seal between glass and frame makes for outstanding energy efficiency at even the largest sizes.
- ELEGANCE – Fibrex® material easily supports the weight of the heavy glass commonly needed for large picture and specialty windows. It also allows for thinner frames, which means maximal glass space for incredible views and lots of light.
- VERSATILITY – 16 standard shapes with a myriad of customization options. Beautifully combines with other windows, both picture windows and operable sashes. Pair a casement window on either side to increase ventilation or combine different sizes and shapes for a dramatic look. Wide selection of grilles, glass patterns, interior trims and casings for ultimate beauty.
frequently asked questions
Specialty windows are non-standard, custom-shaped windows designed to fit unique architectural needs. They come in a variety of shapes such as arches, circles, triangles, trapezoids, and more. Andersen, Marvin, and Pella offer extensive customization options for these types of windows.
All brands offer a wide range of shapes, including:
- Andersen: Custom geometric shapes like octagons, circles, half-moons, and more.
- Pella: Offers curved, angular, and custom designs like pentagons, ovals, and custom arches.
- Andersen: Primarily offers wood frames with low-maintenance Fibrex® composite exteriors for durability and energy efficiency.
- Marvin: Provides specialty windows in wood or fiberglass (Ultrex®), known for strength and weather resistance.
- Pella: Offers specialty windows in wood, vinyl, and fiberglass, with a variety of interior and exterior finishes.
Andersen: Offers a 20-year warranty on glass and a 10-year warranty on non-glass components, including Fibrex material.
Pella: Features a limited lifetime warranty on its specialty windows, covering defects in materials and workmanship for peace of mind.