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pella impervia windows surround a father and daughter at a table

Engineered for lasting durability.

Pella® Impervia®

Delivering unmatched strength and lasting durability with proven performance and sleek, timeless style.61

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When it Comes to Having it All, Pella Impervia is an Overachiever

Complement your home with windows that provide exceptional durability, beauty and peace of mind. Pella’s proprietary, low-maintenance fiberglass is tested to withstand some of the harshest conditions, including extreme heat and sub-zero cold, damaging UV rays and seacoast environments.61



Created with a one-of-a-kind manufacturing process, our fiberglass is the strongest material for windows, engineered for lasting durability.61 Our long-lasting powder-coat finish meets AAMA 624 which is a highly-rated fiberglass coating.


Versatile design elements combined with sleek profiles and clean lines deliver a timeless style. With an up-to-date color palette, including Black, grilles-between-the-glass and a revolutionary hardware solution, these windows will help you achieve your design vision.


Pella Impervia products are engineered to withstand the rigorous performance requirements of a commercial building, so you can trust them to perform in your home.43 Suitable for all climates, our fiberglass windows and patio doors help you create a comfortable home year-round.

Engineered to Last & Last

Pella Impervia windows provide relentless performance without sacrificing beauty. Our durable designs and innovative options complement your home’s unique style and improve performance.

Rot- and corrosion-free

Our extremely durable fiberglass will never rot or corrode and is naturally resistant to water and bugs.

Take the heat (and subzero cold)

Tested from -40ºF to 180ºF, our fiberglass is engineered to withstand subzero cold, the most extreme heat and the rigorous performance requirements of a commercial building.43

No painting or refinishing

With a heavy-duty powder-coat finish, Pella fiberglass windows resist chipping, chalking and fading — so you never need to paint or refinish.

Exceptionally energy-efficient

Energy-efficient dual- and triple-pane glass options with argon help slow the transfer of heat, keeping your home more comfortable year-round.

For the Pros

Fiberglass Window Installation and Specs

Learn more about Pella Impervia window installation details and product specifications.

See Installation Specs
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The Pella Difference

We do more than just create windows and doors. We test beyond industry requirements and innovate continuously to make beautifully designed products that you can be proud to own.


Pella products are backed by some of the strongest warranties in the business.

Learn more about Pella warranties