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Weather Resistance

At Pella, we’re determined to build new and replacement windows and patio doors that perform beyond expectations. Explore how our products are built to perform in nearly any weather condition, like rain, snow, wind and hail.

Durable Window Materials

Natural Beauty of Wood

Pella’s exclusive EnduraGuard® wood protection is applied after the pieces have been cut and milled, but prior to final assembly. It provides advanced protection against the effects of moisture, decay, stains from mold and mildew – as well as termite damage. Wood-clad windows and patio doors are protected on the exterior with an EnduraClad aluminum cladding, which resists fading and will look great for years.

Strong & Durable Fiberglass

Pella® Impervia® products are made from our proprietary fiberglass material — the strongest material available for windows and patio doors, engineered for lasting durability.16 Our fiberglass material won't expand, contract or become brittle when exposed to environmental temperature swings, making it a great solution for any climate.

Easy-Care Vinyl

Pella’s unique vinyl formula has been performance-tested for excellent weathering, durability and color retention. Regardless of the weather, you won’t need to paint, stain or refinish your vinyl windows. Our vinyl windows are available with our exclusive energy-saving system, including triple-pane glass, frames with up to 18 insulating air chambers and optional foam insulation.

Weather Performance and Your Home

Explore some of the factors that affect how your Pella windows and doors will perform in extreme weather conditions.

Tight Weatherstripping

Covers the space between the window sash and frame to reduce air leaks and prevent water from entering your home.

Secure Hardware

Our exclusive SureLock design for casement window hardware pulls the window sash tightly against the weatherstripping for a stronger seal.

Impact-Resistant Glass

Exceptionally strong impact-resistant glass helps to reinforce your windows during a hurricane.

Insulating Glass Seals

Insulating glass provides a more comfortable home and exceptional weather resistance by acting like an insulating blanket to reduce heat transfer.

Accelerated Environmental Testing

See how Pella tests our windows and doors for harsh weather. Pella tests samples of materials and products by placing them in a variety of harsh, accelerated conditions to evaluate long-term performance.

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Air, Water and Structural Chamber Testing

We have designed several testing chambers to specifically test for air, water and structural performance. There are a separate set of conditions for each of these tests, and our testing simulates both positive and negative wind loads. We perform this test to make sure our windows and doors can stand up to intense wind and rain.

Accelerated Environmental Testing

We test samples of materials and products by exposing our products to a variety of simulated environmental conditions to evaluate long-term performance. This test helps ensure the long-term performance and beauty of your products in a variety weather conditions.

Insulating Glass Testing

To test how our sealants perform, glass is placed inside a chamber at 140ºF with 100% humidity. It is then moved into another chamber that simulates ultraviolet radiation, then back again. This test shows us how a sealant will last when it is in direct sunlight, humidity and heat.

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24/7 Weather Protection

Welcome to Stormy Heights, a fictional town where residents are forced to contend with weather extremes. Wind-driven rain, extreme heat, subzero cold and more are no match for these homes because every single one is protected from weather 24/7 by Pella windows and doors.

Doing more than just keeping the weather out, we want to celebrate all that Pella windows and doors provide. Comfort, beauty, energy efficiency, strength, durability and the list goes on. Take pride in your windows and doors, providing 24/7 weather protection for your home.

Performance from Pella

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When we say our windows and doors perform well, we're talking about more than just energy efficiency. Dive deeper into sound control, energy efficiency and impact performance.

Window & Door Replacement

Enhance your home’s comfort

Enhance curb appeal, improve energy efficiency and reduce outside noises with replacement windows and doors. 

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

Learn more about Pella warranties