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COVID-19 Update: State and local requirements in your area currently consider window replacement and repair for safety, sanitation, and proper operation an essential service. We can address issues related to security, safety, or potential damage regarding your windows, doors, siding and roof. The health and safety of our homeowners and employees is our top priorities. Read More » We are following all CDC guidelines for business and have adjusted our operations to serve you in the safest possible way.

Under this order, Lifetime Windows & Siding will continue to operate as an essential business in the “critical construction” category of this order. The state has asked us to continue to serve our customers and partners during this challenging time, and we will continue to do so with the commitment and quality you expect from Lifetime.



Whether you’re getting new windows for a new home in Denver or you’re looking to replace existing windows, you have various options in terms of supplies. However, you should know that fiberglass really shines when compared to metal, wood, vinyl and other materials.

An Introduction to Fiberglass Windows

Fiberglass is a material that’s renowned for its strength. The process starts with strong cables of glass that are saturated with resins and pulled through a heated die and cut. The base material is made of silica sand, which is a natural resource. It can endure all kinds of weather and atmospheric conditions, and it’s difficult to scratch or dent. At the same time, it’s lightweight and attractive and allows for more glass space- meaning more views for you!

Why Denver Residents Should Invest in Fiberglass

Colorado summers frequently give us hot days and cool nights. Due to those disparities, windows often expand during the day and contract at night, which can weaken window seals. However, a fiberglass windowpane will swell and shrink to the same degree as the frame around it. As a result, the seals of fiberglass windows hold up well against Denver’s fluctuating temperatures.

Furthermore, these windows can lower a home’s heating and cooling costs by as much as 30 percent. That’s because they’re so effective at holding in the warm or cool air that’s circulating through a house. Therefore, fiberglass window installation could save you a significant amount of money over the long haul.

What Distinguishes Lifetime

Since 2009, Lifetime Windows and Siding has been providing Coloradans with exceptional services and equally exceptional value. With cutting-edge methods and some of the most reliable and energy-efficient products on the market, our company has swelled from two employees to over 30, all of whom are fully trained, experienced, insured and licensed. And, whenever we sell an item, we back it up with a lifetime warranty that transfers to the next homeowner.

In short, we always focus on the safety, the well-being and the satisfaction of our clients. Doing so has allowed our brand to thrive during its first decade, and it makes our work rewarding.

If you’re interested in new or replacement fiberglass windows, know that we distribute Infinity from Marvin windows. They look like beautiful wood windows. For more information or for a free estimate, please don’t hesitate to call us at 303-934-4508.

Describe the details of your home improvement project and we’ll get back to you ASAP with details!