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Window Installation Awards & Badges
  • Ours was a very small project of 3 basement windows. We were pleased with the excellent communication and updates about the status of our pr... read more - Mark D. - 10/15/2019 

  • Great work! They handled replacing some unusually sized doors and were extremely professional and helpful in making decisions. - Amanda B. - 9/12/2019 

  • Great experience. Beautiful new windows. Crew installed in one day. Customer service was also great. - Jill L. - 9/12/2019 

  • On time professional, friendly. Cleaned up after themselves, courteous. Several of my neighbors have used them as well, and I wouldn’t hesi... read more - Sheila H. - 7/31/2019 

  • I had another quote from a competing window company and Lake Washington Windows had a better price. The competing window company had the s... read more - Salmon K. - 6/18/2019 

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 wood clad 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 Colors

Milgard offers 16 colors for fiberglass windows.

  • Bark
  • Black Bean
  • Bronze
  • Cinnamon
  • Classic Brown
  • Espresso
  • Evening Sky
  • Fern
  • Fog
  • Frost
  • Harmony
  • Ivory
  • Pea Pod
  • Sand
  • Tweed
  • Twilight
milgard fiberglass 16 exterior window colors

Fiberglass Technology behind Milgard Windows

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

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 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.


  • Free In-Home Estimate

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2019 Best of Bellevue Award
Best Window companies in Seattle
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