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  • Pella Windows & Doors of Gaithersburg202 Perry Parkway Suite 6Gaithersburg, MD 20877Showroom Details

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Bay Windows

Bay windows are typically a fixed window in the center joined together with your choice of venting windows on each side.


Wood Architect Series 850

Energy Start Most Efficient 2016

Encompass by Pella®

(ThermaStar by Pella®)

Encompass by Pella bay or bow windows offer the convenience of maintenance-free vinyl frames.

  • Beautifully unique glass collections
  • Variety of sizes and styles
  • Richly detailed wood panels
Wood Architect Series PRODUCT OVERVIEW


Wood Designer Series 750

Pella® Impervia®

(Designer Series® 750)

Pella Impervia bay or bow windows are made from Duracast® fiberglass composite with wood frames.

  • 3-unit 30º and 45º bay windows
  • 4- and 5-unit bow windows
  • Custom angles and sizes available

Wood Designer Series PRODUCT OVERVIEW


Wood Pella Series 450

Pella® 450 Series

Pella ProLine bay or bow windows offer the beauty of wood and our most popular window features.

  • 3-unit 30º or 45º bay windows
  • 4- and 5-unit bow windows
  • Custom sizes available
Wood Pella Series 450 PRODUCT OVERVIEW

Fiberglass Pella Impervia

Designer Series

(Designer Series® 750)

Only Pella Designer Series bay or bow windows are available with between-the-glass blinds, shades and grilles that snap in and out so you can change them whenever you want.

  • 3-unit 30º and 45º bay windows
  • 4- and 5-unit bow windows
  • Custom angles and sizes available
Fiberglass Pella Impervia PRODUCT OVERVIEW

Wood Architect Series 850
Energy Start Most Efficient 2016

Architect Series®

(Designer Series® 850)

Pella Architect Series bay or bow windows offer you virtually unlimited design choices — including your choice of Mahogany, Alder, Douglas Fir or Pine interiors.

  • 3-unit 30º and 45º bay windows
  • 4- and 5-unit bow windows
  • Custom angles and sizes available
 Vinyl Pella 350 Series PRODUCT OVERVIEW

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The Right Product for You


At Pella, we know how big of a decision buying windows can be and that the experience isn’t one-size-fits-all. That’s why we are committed to understanding the unique needs of you, your home and what feels most comfortable for your budget—helping find the right products you can feel good about.

Worry Free


At Pella, we believe installation is everything. That is why our certified experts are specially trained to install Pella windows and doors and know the product inside and out. They are committed to being with you from start to finish and beyond, ensuring product satisfaction and leaving your home cleaner than they found it.

Total Care Guarantee


At Pella, our windows are designed with passion, innovated with purpose, built with integrity and backed by the industry’s best warranties. From product to installation to service, our warranties are designed to give you peace-of-mind that if something goes wrong, we’ll be there. 

Step by Step Process


At Pella, we want the replacement process to be an easy journey to expressing your personal style within your home. That’s why our Pella advisors will be by your side offering expert advice every step of the way. From color to materials to hardware, and every detail in between, they are committed to creating a seamless experience to bring your vision to life.

Explore the Pella Promise

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Your Pella Branch Location:

Pella Windows & Doors of Philadelphia

Branch Showroom(s):

Pella Windows & Doors of Berwyn


Pella Windows & Doors of Cherry Hill


Pella Windows & Doors of Langhorne


Pella Windows & Doors of Montgomeryville


Pella Windows & Doors of Whitehall


Pella Windows & Doors of Wilmington


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