How it opens
Double-hung windows open vertically; casement windows hinge at the side; awning windows hinge at the top. Fixed windows frame a view without ventilation. Availability varies by collection.
Discuss My Options
(716) 377-5447Free EstimatePELLA IMPERVIA
A strong frame. A clean profile. Ready for changing seasons.

THOUGHTFULLY CHOSEN. PRECISELY INSTALLED.
Pella Impervia fiberglass windows combine slim profiles with a durable powder-coat finish. Explore interior and exterior color combinations, hardware, and glass options for your home.
Fiberglass frames resist rot and corrosion.
Choose complementary or contrasting interior and exterior finishes.
Create combinations of windows to suit the opening.
Explore casement, awning, double-hung, and fixed configurations.
KNOW WHAT YOU’RE CHOOSING
A closer look at the materials, configuration, and finishing choices.
| Product family | Pella Impervia |
|---|---|
| Frame material | Pella proprietary fiberglass |
| Finish | Powder-coat finish; solid and dual-color combinations |
| Operating styles | Casement, awning, single-hung, double-hung, sliding, and fixed |
| Casement / awning hardware | Easy-Slide Operator or fold-away crank |
| Glass options | Low-E insulating glass; dual- and select triple-pane options |
| Additional glass | Select tempered, obscure, laminated, and sound-control options |
| Sizing | Window sizes in 1/8-inch increments, subject to size and area limits |
A conversation with Isaac can help you narrow it down.
MAKE THE DETAILS YOURS
Bring your ideas. We’ll work through the choices that affect the way your home looks and lives.
Double-hung windows open vertically; casement windows hinge at the side; awning windows hinge at the top. Fixed windows frame a view without ventilation. Availability varies by collection.
Discuss My OptionsCompare frame color, interior finish, grille pattern, and hardware. Match existing architecture or create a more contemporary look.
Discuss My OptionsCompare the exact glass package and unit rating. Lower U-factor means less heat transfer; SHGC describes solar heat gain. The right combination depends on exposure and your goals.
Discuss My OptionsBEFORE YOU DECIDE
For an answer specific to your home, call Isaac.
(716) 377-5447Your quote depends on the window configuration, size, material, glass, hardware, and the work needed around the opening. We’ll review those details during your free estimate so the scope is clear.
We can compare finishes, profiles, glass, and trim details with your existing home. Photos and inspiration are helpful, and final measurements are taken for the opening.
We’ll define removal, fitting, weather sealing, and interior and exterior finish work in your project scope. Any repairs or changes to the opening should be identified and discussed before the work is agreed.
Coverage varies by manufacturer, product, component, and finish. We’ll review the applicable written manufacturer warranty and clarify installation coverage in your proposal.
Request a free estimate or call (716) 377-5447. Share your location and a little about your project; we’ll discuss the next step for your home.
A CLOSER LOOK
Explore the manufacturer’s information, then ask us about the options available for your project.
Serving Clarence, Williamsville, East Amherst and surrounding Western New York communities.
A FREE ESTIMATE. A CLEAR NEXT STEP.
Interested in Fiberglass Windows? Tell Isaac what you have in mind.
Prefer to talk? Call us directly.
Start with a few details. We’ll take it from there.
LOCAL GUIDANCE. A PERSONAL APPROACH.
Talk with Isaac about your home, your priorities, and the details that matter to you.