Superior durability in extreme weather conditions.1
The quality look of a painted window.
More peace of mind and beauty that endures.
Exceptional energy efficiency.
Be Window Smart
Fiberglass Windows and Patio Doors
Choose one of the available styles to begin
Stay comfortable inside — no matter the weather outside — with Pella's fiberglass windows. Our durable, patented fiberglass composite can withstand extreme heat to subzero cold for maximum performance with:
Pella's five-layer Duracast® composite, which is highly stable and suitable for all climates. As the most durable material available in windows and doors, it prevents warping, shrinking and brittleness.
Beautifully complements your home.
Brings more of the outdoors in.
ENERGY STAR® certified.
Pella Impervia products offer the energy–efficient options that will meet or exceed ENERGY STAR certification in all 50 states.
Optional foam–insulated frames.
Further improves energy efficiency in extreme climates.
Stays looking great for years.
Long–lasting factory powder–coat finish looks great — inside and out — with little care.
Pella's environmentally friendly paint process
Virtually eliminates VOCs to help keep the air inside your home healthier.
How to measure
Sizing Chart Information
Looking for installation guides? Get answers to your installation questions in our comprehensive Pella window and door installation guides.Visit installpella.com.
Rather not tackle window installation?
Let a Lowe's Project Specialist help with an expert installation and professional service you can count on.
Pella® fiberglass windows and patio doors are backed by the Pella Limited Lifetime Warranty – one of the best warranties in the business. See written warranty for complete details.
1 In testing performed in accordance with ASTM testing standards, Pella's Duracast fiberglass composite material has displayed superior performance in strength, ability to withstand extreme heat and cold, and resistance to dents and scratches.