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Best type of window for your home
Looking to add the best replacement windows to your home? The best window replacements have durability, and stability. They also stand up to weather in style. High quality replacement windows are energy efficient, too. There’s value in replacing windows. You can recoup more of your investment with windows than other projects.1
Your climate, architectural style, and personal preferences all play a role in determining the best type of windows for your home. In this blog, we'll explore how to find the right windows for your home.
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What is a replacement window?
Replacement windows, also known as retrofit windows, are new windows that replace old windows. They can get installed as insert replacements where a new window fits into an existing frame. Full-frame window replacement involves replacing a window frame. Infinity custom sizes all its windows for a proper fit in your home.
New construction windows differ from replacement windows. They use a nailing fin, or flange, to attach to the studs of a home’s frame. New construction windows get installed in openings that don’t have trim or siding in place.
Best replacement window materials
As you compare brands and materials, check the frame material, glass, and functionality. Common window materials include wood, vinyl, fiberglass, and aluminum clad. Infinity consultants will help you design your home’s perfect windows and patio doors. We build our windows and patio doors with Ultrex® fiberglass. Ultrex is 8x stronger than vinyl and 3x stronger than Renewal by Andersen’s Fibrex®.2
Ultrex fiberglass windows and patio door advantages
You can compare fiberglass vs. vinyl windows, but the numbers don’t lie. Our Ultrex fiberglass features some impressive numbers.
Our Ultrex fiberglass expands 87% less than vinyl. Plus, 48,000 hours of sun can’t fade our Ultrex fiberglass finish.3
Fiberglass windows have a longer useful life expectancy than vinyl.4
Ultrex’s low thermal conductivity and energy efficient glass options can you save money.5
Stronger material means we need less material for our window and door frames. That translates into bigger, brighter views for your home. Bigger views mean you can enjoy more of the benefits of natural light in your home.
Best replacement windows
Common replacement window styles include: single and double hung windows, casement windows, awning windows, and slider windows. Each type of window operates differently and can suit specific rooms in your home better.
Window options
Installers work with you to make sure you get the right fit for your windows. Our windows and doors come custom-designed to blend into your home’s style. Combine double hung windows with special shapes or round tops for a stunning look. You can also add Grilles Between the Glass (GBGs) or Simulated Divided Lites (SDLs) for traditional window grid style.
Window glazing
Our glass coating options can match the climate needs of your home’s region. Our Low E1 glass coating works well in colder climates. Low E1 allows more heat into homes. Our Low E3 coating works well in warmer climates because it can reject solar heat. We also have Low E2 and Low ERS coatings. Low E2 works well in moderate climates. Low ERS has an extra interior-side metallic layer to reflect heat back into a room for year-round efficiency.
Choosing the best windows for hot or cold climates
Whether you're facing sweltering heat or frigid winters (or both), understanding your local climate is essential for choosing the right windows.
Best windows for cold climates:
In regions with cold winters, choose replacement windows with a low U-factor. The lower the U-factor, the better the insulation. These windows minimize heat loss, keeping your home cozy during chilly months.
Additionally, consider the Solar Heat Gain Coefficient (SHGC). While SHGC is less critical in cold climates, it still matters. Opt for windows that strike a balance — allowing sunlight to warm your home during the day while preventing excessive heat loss at night.
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Best replacement windows for hot climates
For scorching summers, focus on two key features:
Low-E Coatings: These special coatings reflect heat energy away from your home. They act as a shield against intense sunlight, reducing solar heat gain. Look for windows with Low-E coatings to keep indoor temperatures comfortable.
Tinting Options: Tinted windows enhance privacy and help regulate indoor heat. They block harmful UV rays and reduce solar heat penetration. Consider these options to keep your home cooler during hot seasons.
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Best windows for your climate
Knowing the glass glazing options and ratings to follow can help you make an informed decision on windows. Plus, Infinity’s Ultrex® fiberglass windows have better insulation than aluminum windows. That means Ultrex fiberglass can help keep heat and cold out of the home.
Infinity replacement windows, when paired with the ideal glass coating for your climate, may improve your home’s energy efficiency.1 An Infinity expert can review your specific climate needs to find the right window and glass option for your home.
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How windows get rated for performance in different climates
Window performance information is shared on window labels from the National Fenestration Rating Council. A window label includes: U-factor, SHGC, visible transmittance (VT), and optional air leakage ratings. All of which can help you find the best windows for your climate.
Window U-factor
U-factor measures how well a window keeps heat in your home and ranges from 0.10-2.00. A higher number allows more heat to escape.
Window Solar Heat Gain Coefficient (SHGC)
The SHGC measures how much heat from the sun enters a room. In a warmer climate, you’ll want a window with a lower SHGC number. Lower SHGC numbers reduce cooling costs. Higher SHGC numbers can reduce heating costs. SHGC numbers range from 0.00-1.00.
Window Visible Transmittance
Visible transmittance (VT) measures how much natural light enters your home. VT can help homeowners change their indoor lighting use by relying more on natural light. VT numbers range from 0.00-1.00.
Window Air Leakage
Air leakage ratings measure how much air will enter a room through a window. Air leakage rates of ≤ 0.3 mean fewer drafts.
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Map via ENERGY STAR
Best windows for the Northern climate zone
Specific types of windows suit the Northern Climate Zone better than others because of the cool, damp climate. Ultrex resists warping and weathering in any climate. Cities in the Northern zone, like Chicago and Detroit, have extremely cold, snowy winters. Here it's important to harness the sun to keep your home warm. The cold and wet Northeast also falls into the Northern climate zone in the ENERGY STAR® Climate Zone Map. It’s best to check with local building officials to learn if your location must follow specific state codes. You can also use the climate zone finder to get the best information about your climate zone.
U-factor and SHGC recommendations
The Northern region of the ENERGY STAR® Climate Zone Map suggests windows with:
A U-factor equal to or less than 0.22 and SHGC equal or greater than 0.17 or
A U-factor equal to 0.23 and SHGC of 0.35 or more or
A U-factor of 0.24 and SHGC of 0.35 or more or
A U-factor of 0.25 and SHGC of 0.40 or more or
A U-factor of 0.26 and SHGC of 0.40 or more
Windows with U-factors of 0.30 and less will keep more heat in. Windows with a higher SHGC number can help reduce heating costs, according to the Department of Energy.
Best windows for North-Central Climate Zone
The North-Central climate zone includes portions of states like New Jersey, Philadelphia, and Virginia.
U-factor and SHGC recommendations
ENERGY STAR certification criteria for the North-Central climate zone suggests windows with:
A U-factor equal or less than 0.25 and SHGC of 0.40 or less
Best windows for South-Central Climate Zone
Places like Atlanta and most of California land in the South-Central climate zone where the ENERGY STAR certification criteria is:
A U-factor of equal or less than 0.28 and SHGC of 0.23 or less
Best windows for Southern Climate Zone
The Southern climate region includes places like Dallas, Texas and Florida. This climate zone faces higher temperatures and more direct sunlight. The low expansion rate of Ultrex fiberglass, paired with our energy efficient glass options makes it great for Southern homeowners. Plus, Ultrex fiberglass will not melt or lose its shape, even when exposed to temperatures of up to 285° F. Vinyl can start to soften and melt at 163° F.
U-factor and SHGC recommendations
U-factors of 0.32 or less
SHGC numbers of 0.23 or less
Best windows for your style
You want your new windows to suit your climate, but you also want them to fit the style of your home. Traditional homes typically pair well with double hung or casement windows, reflecting their classic charm. In contrast, modern or contemporary homes often benefit from sleeker options like picture or awning windows.
Consulting with an Infinity expert in your area can provide valuable insights and ensure the replacement windows enhance your home's architectural style.
How can I improve my energy performance?
If your windows are old, the best way to improve energy performance is replacement windows. Old windows lose energy efficiency as caulk deteriorates or weatherstripping starts to fade. Additionally, replacing old single-pane windows with double-pane windows can boost energy efficiency.6
Energy efficiency and sustainability
Investing in energy-efficient replacement windows is a smart move that delivers immediate and long-term benefits. Infinity fiberglass windows help lower utility costs by reducing energy consumption and play a vital role in minimizing your home's carbon footprint. When shopping for replacement windows, consider materials like fiberglass, renowned for its exceptional insulation properties and durability. Unlike traditional wood windows, fiberglass requires minimal maintenance, offering a hassle-free solution that contributes to a more sustainable and energy-efficient home.
Budget and long-term value
Replacing your windows is an investment that can yield substantial savings over time. By opting for energy-efficient replacement windows, you can enhance your home's energy efficiency, controlling utility bills and reducing maintenance expenses. Additionally, exploring financing options can help offset upfront costs and make the investment more manageable. Ultimately, replacing your home’s windows is a wise investment that delivers long-term value.
How to find the best replacement window company
When selecting the perfect replacement windows for your home, look for local independent professionals who know your community. They can share personalized recommendations tailored to your home's unique needs.
Infinity by Marvin hand-selects independent window experts across the country to offer and install Infinity’s Ultrex® fiberglass windows. From assessing your requirements to providing product suggestions and offering expert installation services, they ensure a seamless experience from start to finish. And don't hesitate to ask for references and review customer testimonials. This ensures you're partnering with a trusted, experienced professional who delivers exceptional results. With the guidance of a local Infinity expert, you can confidently choose replacement windows that enhance your home's comfort, efficiency, and overall appeal.
Ready to learn more?
Finding the best replacement windows for your home requires careful consideration of climate, style, energy efficiency, budget, and professional guidance. Learn more today by scheduling your free, no-obligation consultation with an Infinity expert in your community.
Frequently asked questions
Durability matters when comparing fiberglass vs. vinyl windows. Ultrex is tough enough to withstand wind, hail, branches, and even a direct hit from a baseball. It also handles extreme temperatures. Ultrex will not lose its shape even when exposed to temperatures of up to 285° F. Vinyl can start to soften at 163° F.
Vinyl windows offer an affordable option. But they come with fewer benefits when compared to Ultrex fiberglass windows.
Yes, you can paint fiberglass windows.
Our Ultrex fiberglass windows need virtually zero maintenance. You might want to inspect them annually to note any potential issues. Cleaning windows doesn’t involve a lot of work. A non-abrasive microfiber cloth and dish soap can do the trick.
Fiberglass windows perform well in cold weather. They are some of the best windows for cold climates. Vinyl windows can become brittle in cold weather. Ultrex fiberglass expands 87% less than vinyl for superior stability.
When comparing fiberglass windows vs. aluminum windows a few things stand out. Fiberglass windows have less conductivity than aluminum windows. That means it’s tougher for heat to pass through fiberglass than aluminum. Since aluminum is a metal, heat and cold passes through easily. That heat transfer can decrease your home’s energy efficiency.
A window replacement project ranks high on the list of home improvement projects. You can recoup between 70% and 76% of your window replacement cost when you sell your home. It’s a project that holds its value well. You can also enjoy improved energy efficiency when you replace older windows.
1 2025 Cost vs. Value report from Journal of Light Construction.
2 Fibrex is a registered trademark of Andersen Corporation
3 Average sunlight exposure per 10 years
4 “Life cycle assessment of windows for the North American residential market: Case study” by the University of British Columbia. Scandinavian Journal of Forest Research, 2008.
6 Savings reflect installing ENERGY STAR certified products compared to non-certified when replacing single pane windows based on the average savings among homes in modeled cities. Actual savings will vary by product type, location, method of installation, individual home characteristics, local climate and conditions, utility rates, and other factors.