Go With the 1st Choice for Fiberglass Windows in Longmont, CO

Window replacement is a significant investment for homeowners in Longmont, Colorado – especially fiberglass windows. However, for the best in window installation and vinyl window upgrades, 1st Choice Windows & Siding is your trusted partner!

For decades, 1st Choice has been helping homeowners upgrade their living situations with targeted exterior renovations. Our residential window services and commercial window services are unrivaled in the community. Forget dealing with any other window contractors – deal with 1st Choice!

What’s the Deal with Fiberglass?

In window design, using a material with natural reliability for window frames is vital to a successful update. Fiberglass windows are among the best and most dependable materials you can buy.

Fiberglass window insulation is among its best features, giving you energy-efficient windows thanks to the window glazing. You’ll notice a difference in your energy bills after only a few months of using your new windows.

As a product in noise reduction windows, fiberglass is also a winning investment. With fiberglass windows, customers report less noise inside their homes. After all, living next to a busy street can be an annoyance for many people.

Even in UV protection windows, fiberglass soars. Get ready to enjoy a window that brings the right amount of light inside your home instead of too much of it.

Fiberglass Window Installation by 1st Choice

1st Choice excels in providing our customers with the most reliable service in the community. We aim to give customers an experience with a craftsman-style appreciation for detail that won’t require window maintenance or vinyl window repair services. When we’re done, you’ll look at your home in a new light!

Call 1st Choice Today!

1st Choice Windows & Siding in Longmont, CO, is excited to provide customers with fiberglass windows. Even if you don’t choose fiberglass, we can still provide you with other services like custom vinyl windows. Whatever your desire, we’ll work with you to make it happen. Contact us today to get the ball rolling!

“Window replacement was for our elderly mother and the professionalism of the entire 1st Choice team, greatly appreciated by the family - we did not have to worry that mom was being sold a 'bag of goods.' Love the new windows! Noise reduction, energy efficiency, look, all just great!”

Jane W
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“Window replacement was for our elderly mother and the professionalism of the entire 1st Choice team, greatly appreciated by the family - we did not have to worry that mom was being sold a 'bag of goods.' Love the new windows! Noise reduction, energy efficiency, look, all just great!”

- Jane W

“I could not believe how fast they got the job done and how well done it was! They obviously were very careful about every detail. The house looks fantastic and everyone I talked to at the company was great to work with. The guy who did the inspection for the people who bought our house even asked us who did the siding because they did such a great job!”

- Abby C

“Chris was an absolute gem to work with and the window suggestions were perfect. The home was built in 1962 and had all of the old steel frame windows which were losing energy rapidly. We noticed an immediate change in the environment inside the house and the outside looks fantastic. Great installers.”

- Carol S
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