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Fiberglass Windows

Fiberglass Windows for Seattle, Bellevue and Puget Sound Homeowners

For installation and replacement of fiberglass windows, Seattle residents
can count on the window replacement pros at Lake Washington Windows.

For a FREE estimate just call 425-255-2600 or contact us online!

Fiberglass Window Replacement Benefits

Why choose fiberglass replacement windows over vinyl, wood, or aluminum windows? Here are some reasons:

  • Highest material strength and durability
  • Excellent energy efficiency
  • Extremely resistant to warping caused by heat or moisture
  • Wide range of styles, including woodclad finishes
  • Easy to paint (if desired)

What’s more, fiberglass windows are environmentally friendly. In addition to their energy-efficient thermal performance, fiberglass windows are manufactured using highly sustainable materials (like sand), arguably making fiberglass one of the greenest window choices available.

Milgard Fiberglass Windows

Replacement Fiberglass WindowsWhy does Lake Washington Windows recommend Milgard fiberglass windows?

It’s simple – we’ve been installing replacement windows in Seattle and the Northwest for over 15 years, and have found that Milgard products are consistently among the highest quality and longest lasting windows in the industry.
Milgard Windows Fiberglass
The Milgard Essence and Ultra Series continue this standard of excellence, and are covered by Milgard’s full lifetime warranty.

Fiberglass Technology behind Milgard Windows

Contact Us Today to schedule a free in-home estimate!

Fiberglass Window Gallery

Free Replacement Estimate

Start saving energy, lower your heating bill, and improve the appearance of your home. Call the Certified Window and Door Replacement Specialists at Lake Washington Windows at (425) 255-2600 for a Free Estimate! We offer financing and payment plans too.

  • 5 star ratingThe windows are great. Look good, function well, they do what I want them to do. Installers were phenomenal and... read more

    Jeffrey H. Avatar Jeffrey H.
    5/25/2018
  • 5 star ratingWe just replaced all our windows and two sliding doors through Lake Washington Windows and Doors.  Our house was a... read more

    Amy S. Avatar Amy S.
    6/14/2018
  • 5 star ratingThe quoting experience was very pleasant and fun, thanks to the sales representative who came to my new house. We... read more

    Ranny N. Avatar Ranny N.
    6/15/2018
  • I went with Lake Washington Windows & Doors because I got the feeling that they were a company who cared... read more

    Jeffrey Hove Avatar Jeffrey Hove
    6/07/2018
  • The office staff is terrific at keeping you up-to-date with where you are "in line." And as the installation time... read more

    Adrienne Huss Avatar Adrienne Huss
    5/01/2018
  • I can’t say enough about Lake Washington Windows and Doors. Incredible service and follow through even after the warranty period... read more

    Sue Richards Avatar Sue Richards
    3/29/2018
  • We are very pleased with the installation of our new Milgard Vinyl Styleline Windows (horizontal and vertical venting as well... read more

    Arthur Lander Avatar Arthur Lander
    7/15/2018
  • I would recommend them to everyone and would use them again. Crew worked hard and completed the job on time.... read more

    Courtney Sturgeon Avatar Courtney Sturgeon
    4/23/2018
  • Very happy with Lake Washington Windows & Doors - from the initial appt with the sales rep through to the... read more

    Debbie Worthey Avatar Debbie Worthey
    5/03/2018
  • We just replaced all our windows and two sliding doors through Lake Washington Windows and Doors. Our house was a... read more

    Amy St Pierre Avatar Amy St Pierre
    6/14/2018

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