Six Important Things To Consider When Choosing Your Replacement Windows
Choosing the right replacement windows for your home is a big decision that affects energy efficiency, durability, and overall comfort. With so many options available, it’s important to know what to look for. Here are six key factors to consider when selecting the best replacement windows for your home.
1. Frame Material: Vinyl for Strength and Efficiency
The material of your window frame plays a significant role in its performance and longevity. Vinyl windows are a top choice because they are durable, low-maintenance, and excellent at insulating your home. Unlike wood, vinyl doesn’t warp, crack, or require frequent painting. Additionally, vinyl frames help reduce energy loss, making them a cost-effective choice.
2. U-Value: Measuring Insulation Performance
The U-value measures how well a window prevents heat from escaping. A lower U-value indicates better insulation, which helps keep your home warm in the winter and cool in the summer. When selecting replacement windows, look for ones with a low U-value to improve energy efficiency and lower heating and cooling costs.
3. Air Infiltration: Keeping Drafts Out
Air infiltration refers to the amount of air that leaks through the window. The lower the air infiltration rating, the better the window is at keeping drafts and outside air from entering your home. High-performance windows have tight seals and quality construction to minimize air leakage, improving indoor comfort and energy savings.
4. Design Pressure and Performance Grade: Window Strength Matters
Design pressure (DP) and performance grade (PG) ratings indicate how well a window withstands wind, rain, and structural stress. A higher DP or PG rating means the window is more resistant to extreme weather conditions. If you live in an area prone to high winds or storms, choosing windows with strong DP and PG ratings ensures long-term durability and protection.
5. Solar Heat Gain Coefficient (SHGC): Controlling Heat from the Sun
The solar heat gain coefficient (SHGC) measures how much heat from the sun enters through the window. A lower SHGC means less solar heat passes through, keeping your home cooler in warm climates. In colder regions, a higher SHGC can help retain heat during winter. Selecting the right SHGC based on your climate improves energy efficiency.
6. Visible Transmittance (VT): Maximizing Natural Light
Visible transmittance (VT) refers to the amount of natural light that passes through the window. A higher VT rating allows more daylight in, reducing the need for artificial lighting while maintaining energy efficiency. Balancing VT with SHGC ensures comfort without excessive heat gain.
By considering these factors, you can choose replacement windows that offer durability, energy efficiency, and long-term performance, making your investment worthwhile.
Choosing the right replacement windows for your home is a big decision that affects energy efficiency, durability, and overall comfort. With so many options available, it’s important to know what to look for. Here are six key factors to consider when selecting the best replacement windows for your home.
1. Frame Material: Vinyl for Strength and Efficiency
The material of your window frame plays a significant role in its performance and longevity. Vinyl windows are a top choice because they are durable, low-maintenance, and excellent at insulating your home. Unlike wood, vinyl doesn’t warp, crack, or require frequent painting. Additionally, vinyl frames help reduce energy loss, making them a cost-effective choice.
2. U-Value: Measuring Insulation Performance
The U-value measures how well a window prevents heat from escaping. A lower U-value indicates better insulation, which helps keep your home warm in the winter and cool in the summer. When selecting replacement windows, look for ones with a low U-value to improve energy efficiency and lower heating and cooling costs.
3. Air Infiltration: Keeping Drafts Out
Air infiltration refers to the amount of air that leaks through the window. The lower the air infiltration rating, the better the window is at keeping drafts and outside air from entering your home. High-performance windows have tight seals and quality construction to minimize air leakage, improving indoor comfort and energy savings.
4. Design Pressure and Performance Grade: Window Strength Matters
Design pressure (DP) and performance grade (PG) ratings indicate how well a window withstands wind, rain, and structural stress. A higher DP or PG rating means the window is more resistant to extreme weather conditions. If you live in an area prone to high winds or storms, choosing windows with strong DP and PG ratings ensures long-term durability and protection.
5. Solar Heat Gain Coefficient (SHGC): Controlling Heat from the Sun
The solar heat gain coefficient (SHGC) measures how much heat from the sun enters through the window. A lower SHGC means less solar heat passes through, keeping your home cooler in warm climates. In colder regions, a higher SHGC can help retain heat during winter. Selecting the right SHGC based on your climate improves energy efficiency.
6. Visible Transmittance (VT): Maximizing Natural Light
Visible transmittance (VT) refers to the amount of natural light that passes through the window. A higher VT rating allows more daylight in, reducing the need for artificial lighting while maintaining energy efficiency. Balancing VT with SHGC ensures comfort without excessive heat gain.
By considering these factors, you can choose replacement windows that offer durability, energy efficiency, and long-term performance, making your investment worthwhile.
Explore Our Blog Categories
Window Replacement Tips

A Look Into Some Of The Different Styles Of Windows Available
Explore popular window styles like **double hung**, **casement**, **picture**, and **slider** to boost your home’s light, airflow, energy efficiency, and style.

How New Windows Can Save Money
New windows save money by lowering **energy costs**, qualifying for **tax credits**, and boosting **resale value**. ENERGY STAR® certified options improve efficiency, comfort, and curb appeal—making them a smart, long-term investment for any homeowner.

How Often Should Windows Be Replaced?
If your windows are over 20 years old, drafty, or outdated, it may be time for a replacement. Upgrading improves energy efficiency, enhances style, boosts comfort, and can lower utility bills—making it a smart, long-term investment for your home.
Energy Efficiency Insights

What Does The Design Pressure Rating Of A Window Mean?
The design pressure rating (DP) measures a window’s ability to withstand wind, water, and structural forces. A higher DP rating means stronger performance—crucial for storm-prone areas and overall home protection.

What Exactly Is “Low-E” Found In Windows?
Low-E (low emissivity) glass has a special coating that reflects heat, improving insulation and energy efficiency. When combined with argon or krypton gas fills, it helps keep homes comfortable and lowers energy costs year-round.

How much do windows affect a home’s energy usage?
Windows significantly impact home energy usage. Upgrading to energy-efficient windows can reduce heating and cooling costs, improve comfort, and enhance overall energy efficiency.
Window Installation and Maintenance

How to Find Air Leaks in Your Home and Save Money
Air leaks in windows, doors, and other areas raise energy bills and create drafts. Seal them with weather stripping, caulking, or door sweeps to improve comfort, cut costs, and reduce your carbon footprint. For hidden leaks, consider a professional energy audit to maximize savings and efficiency.
Latest Industry Trends

How Strong Windows Protect Homes
Strong window systems systems, like specialized windows and doors, are vital for protecting homes from high winds and debris during storms. The 2024 hurricane season highlighted their importance as climate change drives more intense weather. These systems enhance resilience, energy efficiency, and safety, making them essential for storm-prone communities and future-ready building practices.
Completed Projects

A Look Into Some Of The Different Styles Of Windows Available
Explore popular window styles like **double hung**, **casement**, **picture**, and **slider** to boost your home’s light, airflow, energy efficiency, and style.

How New Windows Can Save Money
New windows save money by lowering **energy costs**, qualifying for **tax credits**, and boosting **resale value**. ENERGY STAR® certified options improve efficiency, comfort, and curb appeal—making them a smart, long-term investment for any homeowner.

How Often Should Windows Be Replaced?
If your windows are over 20 years old, drafty, or outdated, it may be time for a replacement. Upgrading improves energy efficiency, enhances style, boosts comfort, and can lower utility bills—making it a smart, long-term investment for your home.
Get Expert Window Advice Today
Reach out to James River Windows for tailored guidance on your window replacement journey. Our experts are ready to help you choose the perfect windows for your home. Experience quality and affordability with our custom solutions.