Quality Construction

Pella® windows are built to last. And engineered to endure.

For more than 85 years, Pella has set the industry standard for quality. Now, a lot of companies tout their quality. At Pella, when we talk about quality craftsmanship, here is what we mean.


At Pella we continually strive to design better windows. Many features that are now industry standards — such as the tilt-wash double-hung window — were invented by Pella. In fact, we have been awarded more than 100 product and design patents.


Pella artisans have a passion for excellence and attention to detail. We take extra steps to assure outstanding quality. For example, the sash corners on our wood products are joined not one, but three ways for superior strength.

State-of-the-art testing laboratory

In our state-of-the-art product-testing facilities, we continually test the components of Pella windows under the harshest conditions — the burning rays of the sun, salt air, acid rain, excessive humidity, extreme hot and cold temperatures, high wind and driving rain. And Pella tests for air and water infiltration and structural strength during the manufacturing process. These stringent measures ensure our windows and patio doors will perform the way we say they will.

Continuous improvement methodology

Continuous improvement is deeply ingrained in Pella’s culture. Pella team members are encouraged to refine our processes so we can produce great results — the highest quality products and the latest innovations for our customers.

Factory assembly

All Pella windows — and a large selection of window combinations — are completely assembled in our factory. This leaves less room for error during installation and ensures your window will perform up to Pella’s high quality standards.

Factory prefinishing

In Pella’s proprietary process, the individual parts of Pella wood windows are stained or painted before the window is assembled to ensure a quality finish.

Environmental stewardship

Our factory processes are optimized to create less waste. Excess manufacturing materials are either sold for reuse in other products or recycled for use in our own. And, the factory powder-coat process for our fiberglass products and our water-based wood stains are especially friendly to the environment.

Virtually every opening wood window is tested for air infiltration on the manufacturing line.