Sunlight that streams through windows can cause rooms to heat up quickly, especially in the summer. While window treatments like blinds and curtains can help block some sunlight, they aren’t always effective at keeping rooms cool.
If you have issues with excessive heat from sunlight, consider investing in replacement windows explicitly designed to block solar heat gain.
A few different features and technologies are used in sun blocking window products. The options range widely in effectiveness, cost, and aesthetic appeal. I’ve carefully weighed the pros and cons of each type to help you make the best sun blocking window choice for your home.
Types of Sun Blocking Windows
There are a few main window types designed to block sunlight and reduce solar heat gain:
- Tinted windows: Tinted window glass contains added minerals and pigments that reduce light transmission. Tints are available in different shades, from light to dark. Keep in mind that darker tints block more sunlight but also reduce visibility.
- Reflective low-E coated windows: Windows with reflective metallic or ceramic coatings block more solar radiation than clear glass alone. Low-emissivity (low-E) coatings are standard reflective coatings that block UV and infrared light, reducing energy loss by 30% to 50%, according to ENERGY STAR.
- Electrochromic windows: These “smart glass” windows can electronically tint to block sunlight on demand. Homeowners can adjust the tint level is for customizable light, glare, and heat control.
- Solar screens: Exterior roller shades made of solar fabric can block up to 80 percent of solar heat gain while preserving views. These are add-on products you can install over existing windows.
Pros and Cons of Sun Blocking Windows
Consider the following benefits and trade-offs of darkly tinted windows and reflective glass:
How Much Does Installing Sun Blocking Replacement Windows Cost?
Installing solar control replacement windows costs an average of $600 to $1,000 per window.
Total costs can vary due to factors like:
- Window type: Advanced low-E and smart glass cost more than conventional double-pane windows.
- Window frame material: Choose from wood, vinyl, fiberglass, aluminum, etc.
- Window size: Larger windows are more expensive to replace.
- Accessibility: Second-story and hard-to-reach windows add labor costs
Here are price ranges for typical sun blocking window options:
- Tinted double pane windows: $250 to $700 per window
- Low-E coated windows: $300 to $850 per window
- Solar control low-E windows: $500 to $1,100 per window
- Electrochromic smart glass: $1,200 to $3,500+ per window
- Solar window screens: $60 to $120 per window
These window costs don’t include professional installation services, which typically add 25% to 50% to the window replacement costs.
DIY or Hire a Pro When Installing Sun Blocking Windows?
Replacing windows is a challenging DIY project requiring intermediate carpentry skills and special tools.
Key steps include:
- Removing existing window sash and frame
- Preparing and sealing the rough opening
- Installing replacement window according to manufacturer instructions
- Insulating gaps, seal, and trim for a finished look
Hiring a professional ensures proper installation and no surprises. Working with the company itself or a professional often provides you with protection from a labor warranty, giving you additional peace of mind. I recommend getting free estimates from reputable local contractors before making a final decision.
So, Are Sun Blocking Windows Worth It?
Sun blocking replacement windows can provide much-needed relief for homes with west- or south-facing windows that absorb the heat. When shopping for new windows, prioritize solar control and heat blocking over visible light transmittance. If your current windows are in good condition, consider lower-cost exterior solar screens for existing windows before replacing them.
Investing in the right high-performance sun-blocking windows can improve your comfort in hot climates and reduce cooling costs and electricity bills.
FAQs About Sun Blocking Windows
Are sun blocking windows more expensive?
Yes, on average, expect to pay 20% to 50% more compared to conventional double-pane windows. Advanced low-E coatings, electrochromic smart glass, and specialty tints will add to this cost. However, exterior solar screens are an affordable option to add to your existing windows.
Do sun blocking windows look dark and tinted?
Darkly tinted windows create this effect, and some homeowners dislike the aesthetic. However, advanced solar control low-E coatings effectively block heat while preserving natural light transmittance and visibility. These products offer the benefits of sun blocking windows without an overly dark or mirrored look.
How long do sun blocking windows last?
Sun blocking windows last 10 years to a lifetime on average. Advanced glazing helps protect against UV damage. Ensure windows have durable low-E coatings and glass for maximum longevity. Fiberglass or vinyl frames also outlast less durable materials.
Can I get a tax credit for installing sun blocking windows?
If the new windows meet ENERGY STAR certification standards for your climate zone, they can qualify for a federal tax credit of up to 30% of installation costs (up to $600 total). However, you must install the windows in a principal residence and include proper sealing for maximum efficiency.
Should all windows in my home have sun blocking features?
Windows that face east, west, or south tend to gain the most solar heat and are smart targets for replacement. North-facing windows are unlikely to overheat significantly and may only need simple blinds or curtains. We recommend conducting an energy audit to help identify problem areas that can help you properly focus your window replacement project.