Replacement Windows in the Denver Metro Area

Wholesale Home Improvements, Denver, Colorado

Looking for replacement windows? Our experienced, no-pressure sales staff is here to help you select the right options for your home and budget, as well as provide professional installation services.

We’ll start with an in-home consultation, including a walk-through of your home to ensure an accurate estimate. Our experts will show you samples and answer any questions you might have so that you can maximize the benefits of your replacement windows:

  • Greater energy efficiency, lower utility bills
  • Improved curb appeal and home resale value
  • Easier to clean and less costly to maintain
  • Increased security and easier egress if needed
  • Noise reduction even on a high-traffic street
  • Comfortable inside temperatures all year long
With WHI, saving money on the cost of your windows doesn’t mean settling for lesser quality.

We offer Energy Star® rated replacement windows from top manufacturers including Pella, Norandex, CertainTeed, Alside, Peachtree and many more. Get in touch today and let’s get started!

How to Choose the Best Replacement Windows

Window Quality & Performance
The Right Style for Your Home
Window Materials and Finishes
Energy Star® Rating Factors
Window Grilles for a Finishing Touch
Window Quality & Performance

Replacement windows come in a multitude of types and grades, all suited best for different purposes.

Higher grades of windows tend to have a better insulation level (“R” level) and deteriorate less rapidly than lower grades. Beware, however, that poorly constructed windows can seem as functional as higher quality windows when they’re brand new because it’s difficult to tell the difference by appearances only.

This can lead to replacing drafty old window with another sub-standard product, plus wasted time and money. Be sure you buy what suits your needs the best, and feel free to ask your WHI representative a billion questions about performance. We’ll steer you in the right direction!

  • Low-performance windows, or builder grade windows, are designed for new home construction or where performance and durability are not as important as cost. The investment on builder grade windows can generally be paid back in less than 2 years.
  • Medium performance windows combine price and durability to create a versatile window that is both long-lasting and aesthetically pleasing. About 7 years or less is the time it takes for a homeowner to fully realize the cost-effectiveness of medium grade windows. This option can deliver noticeable energy savings while not emptying your pocketbook.
  • High-performance windows add a touch of artistry to a functional design by enhancing the beauty of the home with unique designs. At the same time, these replacement windows offer superior insulating value, including up to R-10 on the glass and R-25 on the frames. They also block up to 98% of UV radiation. With a higher price tag than other grades, staying in a home 7 or more years is suggested to fully reap the financial investment of these windows.
The Right Style for Your Home

There are four basic designs of windows, all of which suit different styles of homes and buildings.

While you may think that a certain era of home should dictate the window style, we’ve seen customers mix it up to create a unique look and complement a more modern way of living. So, feel free to go with windows that complement your existing architecture, or mix it up with something bold.

  • Hung and Slider windows open down-to-up or side-to-side respectively. Easy to operate with few moving parts, they’re some of the most common styles due to their cost-effectiveness. Double-hung windows can feature tilt-in sashes that allow you to easily clean window exteriors from inside your home, no ladder needed. However, hung or slider windows can suffer from excessive heat loss if not constructed with a high wind rating or reinforced properly.
  • Casement windows, otherwise known as awning or hopper windows, these use a crank to open and close. Generally, casement windows have a higher cost due to more moving parts but are sturdier and can withstand wind better as it can actually reinforce a window’s insulation instead of degrading it. Their locking mechanism also creates a tight seal to keep the elements out.
  • Fixed or Picture windows offer the greatest insulation value due to their fixed position. Because of this, cleaning may be more difficult than with other replacement window styles. However, they make a great statement in any home and offer an easy way to showcase Colorado’s stunning landscape. If there’s a view you want to frame like art, this is the perfect window style.
  • Bay or Bow windows can be fixed or a combination of fixed and ventilation. They provide a lot of natural light and help spaces feel more open, especially in living rooms. On the interior of the home, they can be paired with an added seating area for reading or simply relaxing.
Window Materials and Finishes

Replacement windows come in a variety of materials. Let’s look at the benefits of wood, fiberglass and other options. In addition to the frame material, there are multiple options for colors and finishes.

  • Fiberglass windows are strong, durable, low maintenance, and provide good insulation. Fiberglass frames can be either hollow or filled with foam insulation.
  • Vinyl windows are low maintenance and provide good thermal insulation. Sections may be hollow or filled with foam insulation, and vinyl sills may be reinforced with metal or wood.
  • Aluminum windows are durable, low maintenance, recyclable and typically have at least 15% recycled content. Frame design includes thermal breaks to reduce heat loss through the metal.
  • Wood windows are strong, provide good insulation, and are generally favored in historical neighborhoods. Wood windows are infinitely customizable and can be painted to match the interior and exterior of your home. The exterior surfaces of many wood windows are clad (or covered) with aluminum or vinyl to reduce maintenance.
  • Combination windows use different materials separately throughout the frame and sash to provide optimal performance. For example, the exterior half of a frame could be vinyl while the interior half could be wood.
  • Composite windows are made of various materials that have been blended together through manufacturing processes to create durable, low maintenance, well-insulated windows.
Energy Star® Rating Factors

Energy Star products are independently certified to save energy without sacrificing functionality, like keeping heat in your home during the winter and outside during the summer. With the right windows, such as double or triple-pane, you could potentially save 15-20% or more on your utility bill and even benefit from reducing noise such as a busy street or nearby railroad tracks.

The older your windows, the more likely you’ll save. Even for a newer home, upgrading “builder grade” windows helps you save down the road. Here are the components and measurements Energy Star uses:

Argon Gas

Used to insulate double-pane glass, argon is a colorless, odorless, non-toxic, inert gas. When used in conjunction with Low-E glass, it dramatically improves a window’s insulating ability with a U-factor (heat flow) 50% better than clear insulated glass and 13% better than insulated glass with Low-E glass only.

Argon also improves a window’s condensation resistance factor (CRF), resulting in a warmer inside glass surface and reduced potential for condensation. Argon-filled glass units also reduce sound transmission by three to four decibels compared to a unit without argon.

Low E-Glass

Low emissivity or Low-E glass has a thin metallic coating applied to the glass in a vacuum chamber. Low-E reflects radiant and solar heat back to their sources. This results in interior heat being reflected back into the house during winter and exterior heat reflected away in the summer. Combined with argon, Low-E glass significantly reduces air conditioning loads and energy bills. Low-E also helps block UV rays, limiting fading of carpets, furniture and drapes.


A measure of thermal resistance, this quantity is used to determine how well material resists the flow of heat through it. The higher the R-Value, the more heat is reflected away from the material and less heat is retained, an especially good value to have in replacement windows.

Solar Heat Gain Coefficient (SHGC)

The solar heat gain coefficient refers to the amount of heat that radiates through the window from the outdoors. It is calculated in decimal form from 0.0 to 1.0. The lower the SHGC, the better the windows are at limiting the sun’s solar energy.


This is the measurement of the non-solar heat flow through a window and one of the three measurements that experts use in evaluating a window’s performance. It is also calculated in decimal points from 0.0 to 1.0. Low-E glass and argon gas configurations are advisable in most regions of the United States to reduce the U-Factor of new windows.

Visible Transmittance

Otherwise known as the amount of visible light entering a room, Visible Transmittance is measured in decimal points from 0.0 to 1.0, similar to SHGC and U-Factor. The higher the value, the more natural light that enters.


Window Grilles for a Finishing Touch

Grilles give the look of individual windowpanes. Window manufacturers offer many different window and door grille types, so you can choose one that best fits your home’s architectural style. For example, a Craftsman home will likely use grilles to create several individual, small windowpanes over one larger.

Grilles also come in different materials and finishes for further customization, from vinyl to wood. They can be located between the panes of glass or on the interior and exterior of replacement windows. Grille pieces between the panes of glass create style while preserving the smooth, easy-to-clean glass surface inside and out. Of course, you can also opt to remove all grills to maximize light and your view.

Get in Touch with an Expert

To get the biggest home improvement bang for your buck, choose WHI in Denver for our friendly team, professional installation services, and low prices on high quality window replacement. Contact us today.