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Frequently Asked Questions For Homeowners

Why should I choose Gravina’s Window Center in Littleton?

Gravina's Window Center of Littleton is Denver's premier window and door experts. We have replaced over 100,000 windows and doors and have served over fifteen thousand customers. When it comes to replacing windows and doors, there's no substitute for our know-how. We are a reliable, trustworthy company you can count on. 40 years in business and counting!

Do I have to order more than one window/door?

No job is too big or too small for Gravina's Window Center. Whether its just one window or door that you need to be replaced or you're planning on replacing all of the windows/doors in your house, we will be happy to assist you with your project, with your timeline and budget in mind.

Does replacing my windows and doors really help to lower my energy bill?

Yes! When you see things like foggy glass, rotting wood, air leaks, and cold spots, you can bet your house is not energy efficient. At Gravina's Window Center of Littleton, all of our product lines are Energy Star rated. Energy Star products are independently certified to perform at levels that meet or exceed strict energy efficiency guidelines set by the U.S. Department of Energy. Products that earn the Energy Star rating are a smart choice because you will save money on energy bills without sacrificing comfort or quality. Energy-efficient products are also a key part of a growing movement toward environmentally-friendly green remodeling. There are also tax rebates and credits available to consumers who replace their windows/doors with Energy Star rated products.

Will New Windows Save You Money?

Sometimes companies that sell replacement windows exaggerate how much money people might save on their heating and cooling bills when new windows are installed. The truth is the money you could save depends on several factors:

What material your existing windows are made of?
How well your home is insulated?
The size of your home and how many windows it has
The shade around your home
The climate you live in

Of course, when deciding whether new windows will save you money, it’s important to consider the upfront costs. The price per window can range from a few hundred to a few thousand dollars, depending on the materials and features you choose and cost of installation.

Do you offer financing?

We have several financing options available. Please ask your sales representative for more details.

Do you offer senior discounts?

Yes. Just let your sales representative know at the time of purchase. We also have special discounts for our men and women serving in the military.

Who do I call if I have a service issue?

Gravina's Window Center of Littleton is a local service center for Marvin Windows and Doors. If you have a problem with one of your windows or doors that we installed, we will send our service technician out to find the problem and resolve it. We are just one phone call away!

What is the time frame for ordering and installation?

Depending upon the product line you choose, the lead time will vary. Some products ship within 6 weeks, others we must allow 8 to 10 weeks. During your consultation, your sales representative can give you more specific information and timelines.

Is your company a different company than the one on Evans?

Yes. We are Gravina's Window Center of Littleton. We are the only Littleton Gravina's and we are a completely separate business. Our company offers the best fiberglass windows on the market, Infinity Replacement Windows from Marvin, and superior installation. We have been in business since 1973.

when is the best time to replace my windows

Window Options

The choices you make about materials, style, glazing, and installation could have a big impact on your energy bill. And some features, like how easy they are to take care of, make windows more appealing for other reasons.


Different window frame materials can affect the appearance, durability, and insulation of your window. For example, wood-framed windows provide good insulation but are heavy and high-maintenance. Vinyl-frame windows insulate well and don’t need painting.


The style of a window can affect how well your window insulates. Single-hung, double-hung, and sliding windows leak more air than casement, awning, and hopper windows.

Glazing and Glass Technologies

Certain window glazes and glass may provide better insulation, light quality, and condensation resistance. For example, windows with low-emissivity (low-e) coatings often are more energy efficient than windows without.

Cleaning and Maintenance

Some materials and features, like tilt-in sashes, make windows easier to care for.


If your windows are not installed according to the manufacturer’s instructions, you might not get the savings or comfort you expect.

Check the Label

Look for the National Fenestration Rating Council’s window label when you shop. It can help you compare how well a window blocks cold, heat, and outside air; allows light in; and blocks condensation.

Source here

When is the best time to replace my windows/doors?

Our professional installers install windows and doors year round. If it's a good time for you, it's a good time for us.

I want to replace my windows/doors, where should I start?

The best way we can help you get started with your replacement project is for you to call our office to set up a free, in-home sales consultation, with one of our friendly sales representatives. It is best if all parties in the decision-making process are present at this time. Our goal is to make this a no-hassle, stress-free experience for you. The salesman will bring literature and samples of our product to your home. A second option is to visit our beautiful showroom in Littleton, where we have our windows and doors on display. Click here to schedule a consultation today.

We would love to hear from you.