Of all the details you need to consider when building a custom home, windows are just one of seemingly hundreds of items to check off your list. However, windows can have a huge impact on the comfort, efficiency, privacy, and aesthetics of your home, making them well worth careful consideration during the new construction process.
Windows contribute significantly to your custom home’s energy efficiency. The windows you select, along with proper installation, can create substantial savings on heating and cooling costs because of their insulating properties. For the greatest amount of insulation, look for multi-pane windows with an optimal gap between the panes.
For Houston’s climate, dual-pane windows are often the most cost-effective option, providing strong insulation while keeping costs reasonable. Triple-pane windows offer improved insulating capabilities, but the added expense is typically only worthwhile in colder climates.
When comparing windows, three important measurements can help you evaluate energy efficiency: R value, U factor, and SHGC.
The R value measures how well a window insulates. The higher the R value, the better the insulation performance.
The U factor measures how much heat transfers through the glass of your windows. The lower the U factor, the more energy efficient the window will be. For our custom homes in Houston, we require a U factor of .40 or less. For additional context, Energy Star certified windows must achieve a U-Factor of .28 or less in Houston.
The SHGC (Solar Heat Gain Coefficient) measures how much solar radiation – or heat from the sun – passes through a window and enters a home. For our custom homes, we require an SHGC of .25 or less, which means the window blocks at least 75% of the sun’s ambient heat and allows 25% or less to enter your custom home. Energy Star certified windows must achieve an SHGC of .23 or less in Houston.
In addition, windows without an NFRC rating should not be used on high-end custom homes.
Understanding these ratings can help you compare products and choose windows that best suit your climate and performance goals. As is the case with any decision you’re making about your custom home, you can rely heavily on your custom builder for guidance. If they are highly qualified and have been building high-end luxury homes in your city for a very long time, their expertise will be of great value during every phase of your custom homebuilding journey.
When selecting windows, the glass itself is one of the most important factors to consider.
Glass impacts insulation, UV protection, and overall energy efficiency. As mentioned earlier, dual-pane windows are often the best balance of performance and value for moderate climates.
Many homeowners also choose low-e glass, which stands for low emissivity. Low-e coatings filter UVA and UVB light while reflecting heat, helping keep homes cooler in warm weather and warmer in cooler temperatures.
Low-e coatings (or glazing) can be applied to either the inside or outside of the window depending on the climate and desired performance. These coatings can significantly improve energy efficiency and overall comfort inside the home. For our homes, glazing should be Cardinal Low-E 366 (with Argon Fill). This combination provides year-round comfort by reducing solar heat gain while still allowing plenty of natural light to enter the home.
Windows and natural light play a huge role in the overall design and atmosphere of a home. In many custom homes, especially those built on acreage or scenic properties, windows are strategically placed to maximize views and natural light as well as to enhance the authenticity of the home’s specific architectural style.
Whether you want a modern, contemporary feel or prefer a more traditional style, there are many different window designs available to complement your home’s architecture. The key is to collaborate closely with your architect, interior designer, and custom builder from the start of your design phase in order to choose just the right window for your custom home. The style of your window significantly impacts the overall appearance of your home, so be sure to take your time in choosing the right one.
Window frame material affects durability, maintenance, appearance, and cost. There are several common options to consider. Again, you will want to collaborate closely with your Dream Team (architect, interior designer, and custom builder) to make the right choice for your custom home.
Wood is the most traditional window frame material. It offers a timeless appearance and can last a long time with proper maintenance. However, wood generally requires more upkeep and may not perform as well in extremely wet or dry climates. For example, in Houston, wood frame windows must be inspected every year and resealed/painted/stained every 2 years. That is quite a bit of maintenance when compared to other window frame types.
Vinyl windows are one of the most popular choices for the general population because they are durable, low-maintenance, and resistant to fading and weathering. Vinyl often provides the best overall value in terms of longevity and maintenance costs. Caulking must be inspected every 2 years.
Fiberglass windows are another low-maintenance option and are known for their durability. Fiberglass tends to be more expensive than vinyl. Just like with vinyl frames, caulking on fiberglass frame windows must be inspected every 2 years.
Aluminum window frames are strong and long-lasting. They do require routine care to preserve their factory finishes, ensure optimal functionality, and prevent corrosion. Aluminum can also be one of the more expensive frame options.
Many of our homeowners choose aluminum-clad windows, which actually feature a natural wooden interior frame paired with an exterior wrapped in a protective, weather-resistant aluminum shell. This allows for a traditional wood look and feel inside the home and a durable, low-maintenance material outside.
We use steel windows and doors on many of our homes, but they are cost-prohibitive for most homes. Because of the strength of steel, these windows can be manufactured significantly thinner than other frame types while still supporting heavy, expansive glass panes. Not only are they the most expensive option, but steel windows also rate fairly poorly on energy efficiency unless they are “thermally broken.” However, thermally broken steel windows are extremely expensive and not always necessary unless you live in an extreme climate.
Want to learn more about Cased vs. Kerfed (Trimless) Windows? Visit our previous blog post here.
Price is always an important consideration when building a custom home. Fortunately, you do not always need the most expensive windows to achieve great performance.
The right choice depends on your climate, location, priorities, and budget. Window material, style, size, and the total number of windows in your home will all impact overall cost. For example, if you select steel windows for your custom home, you can expect to spend considerably more than if you select a different frame material.
We closely track and analyze the itemized construction costs for each of the custom homes we’ve built throughout our four decades of experience building custom homes in Houston, and here is what we’ve found. Windows typically make up between 1.5% and 4.5% of the total construction costs for a high-end custom home, with the average window cost ending up just under 3%.
By understanding the balance between performance, aesthetics, maintenance, and price, you can choose windows that keep your home comfortable while delivering long-term value. The key is to partner with an experienced custom home builder in your area who can advise you on your best options for each and every decision you need to make during your custom home journey.
Window placement and window style can have a major impact on privacy throughout your home. When planning windows for a new construction home, it’s important to think about proximity to neighbors, public sidewalks, and the purpose of each room.
Many homeowners choose windows positioned at different heights or use privacy features such as frosted glass in bathrooms and bedrooms where more privacy is desired. One of the biggest benefits of building a custom home is the ability to tailor window placement specifically to your lot, layout, and lifestyle.
To increase privacy, consider mechanized window shades inside your home. If planned early enough, your architect can incorporate shade pockets into the plans for your home, which conceal the shade boxes and create a sleek, minimalist, highly customized feel. Concealed shade pockets need to be incorporated in the design early so that the framing, reflected ceiling, and electrical plans reflect them properly BEFORE construction begins. This is the only way for your custom builder to build them into your custom home.
Choosing windows for a custom home involves much more than simply selecting a style you like. Your windows will affect your home’s energy efficiency, comfort, privacy, noise levels, and maintenance requirements for years to come.
By asking the right questions early in the design process, you can make informed decisions that fit both your lifestyle and your budget. Whether your priority is maximizing views, improving efficiency, or staying true to a specific architectural style, the right windows can make a major difference in how your home looks and feels every day.
Working with an experienced custom builder can also help you evaluate the many options available and select windows that are best suited for your custom home.