Windows are a key factor in any home’s energy efficiency. When you’re ready to replace the windows in your home, consider your options carefully to choose the ones that will provide the best energy efficiency for your family, your family’s usage and your home’s location.
Benefits of Having Energy-Efficient Windows
Energy-efficient windows help make your home more comfortable year-round, with no need to avoid certain rooms because of extreme temperatures coming in through the windows. Because of this reduced need for temperature regulation, energy-efficient windows can also cut your utility costs significantly and ultimately help you reduce your carbon footprint.
4 Factors That Affect Window Energy Efficiency
Unfortunately, not all new windows are energy efficient. When it comes to your new window selection and installation, there are several factors that can have a direct impact on your home’s improved energy efficiency.
Energy-Efficient Glass
The type of glass that’s in your window absolutely matters. When you’re shopping for new windows, you’ll notice right away several different factors. One of the most important terms to look for is “Low-E.” Low-E (low-emissivity) glass coatings are layers of thermal protection inside insulating glass. Low-E glass helps reflect summer heat or winter cold while also retaining interior cooling or heat. It also blocks harmful UV rays to help prevent sun damage to your skin or your furniture.
There’s a difference in single-, double- and triple-paned windows. As a general rule, the more panes included, the higher the energy efficiency.
Another interesting factor is that inert gas, such as argon, can often be placed between the panes for added insulation.
In addition to the number of panes, the glass itself can be energy efficient. Look for a rating from the National Fenestration Rating Council (NFRC) to determine whether the window is in the Energy Star program. To qualify for Energy Star status, window manufacturers have to meet strict standards measuring a window’s resistance to heat entrance and loss. Looking for that Energy Star rating will keep you on the right track.
2. Window Frames
In addition to the glass, you should also take note of how a window is constructed. Your choice of window frame material and construction can influence your home’s overall energy efficiency.
Here are some examples of window frame types to consider with construction:
Wood window frames: Wood has a low conductivity, allowing less transfer or heat or cold into your home and better overall insulation.
Fiberglass frames: Layered fiberglass frames can also be excellent for energy efficiency simply because of their high durability. They are exceptionally strong and won’t be changed with temperature changes or when exposed to other outdoor elements.
Multi-chambered vinyl frames: These frames are engineered to reduce heat loss, helping you maintain energy efficiency. Similar to double-paned glass, the multiple chambers within the frames hold inert gases that have insulating properties.
Aluminum frames: Aluminum is another durable frame type. They’re often used in places with frequent hurricane damage, for example. However, they are not the best at energy efficiency, having no inherent insulation properties.
3. Window Design
Some window designs are fundamentally more energy efficient than others. It depends greatly on the region of your home and what types of natural elements your windows will be exposed to as to what will be right for you.
Here are a few design options you’ll see:
Double-hung windows: The bottom slides up to open the window unit. These can come in efficient choices, but if you’re in an extreme climate, you may want to avoid double-hung windows to eliminate the potential for air intrusion between the sliders.
Casement windows: These are windows with a crank that swings the window outward to open. This type of window is great for climates where wind is an issue, as they seal themselves more tightly when wind blows toward your house. One drawback of casement windows, however, is the extra maintenance of the hinges and seals.
Picture windows: These come in many options and do not open at all, which can make them more efficient, as long as their glass is also appropriately energy efficient.
4. Window Installation
How a window is installed is as important as the window type itself. If they’re installed incorrectly, your energy-efficient windows may not operate properly at keeping your home insulated.
Proper window installation prevents air infiltration and even water damage. Pre-installation waterproofing the best option for preventing water damage. The level, plumb, bowing and square should all be checked and double checked to ensure the window is installed correctly.
The proper sealants are also extremely important. Expanding foams or sealants are not waterproof and could lead to problems later. Proper caulking and flashing are the cheapest parts of an installation but vital for preventing air and water leaks. Sealing should be handled carefully with an eye to detail.
Our Recommendations for Maine Window Types
Everything we build at Fortin is custom-built; we don’t believe in a one-size-fits-all approach to homeownership. But we also maintain certain standards, and we believe installing new windows on your home can save on heating and cooling costs, plus increase your property value. For our Maine customers, we recommend vinyl or wood frames with Low-E glass. We work with several different renowned manufacturers to fit a range of budgets.
If you’re interested in replacing the windows of your home, reach out to us to discuss what we recommend for your needs.