Reduce Energy Costs With Sun Blocking Windows

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 to cut down on energy costs.

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.

*Costs in this article sourced from contractor estimates used by Fixr and Angi.

Types of Sun Blocking Windows

There are a few main window types designed to block sunlight and reduce solar heat gain:

• Tinted windows and window films: Tinted window glass contains added minerals and pigments that reduce light transmission. Window films and tints are available in different shades, from light to dark. Keep in mind that darker window tints block more sunlight but also reduce visibility.
• Reflective low-E windows: Windows with reflective metallic or ceramic coatings block more solar radiation than clear glass alone. Low-emissivity (low-E) windows come with standard reflective coatings that deliver ultraviolet (UV) protection and block infrared light. This can reduce energy loss by 30% to 50%, according to the International Association of Certified Home Inspectors (InterNACHI).
• Electrochromic windows: These “smart glass” windows can electronically tint to block sunlight on demand. Homeowners can adjust the tint level for customizable light, glare, and heat control.
• Solar screens: Exterior roller shades made of solar fabric can block up to 80% 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 $1,035 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 or window film.
• 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 to labor costs.

Here are price ranges for typical energy efficient window options:

• Window film: $316 to $927 per window
• Tinted double-pane windows: $300 to $2,100 per window
• Low-E coated windows: $300 to $2,680 per window
• Electrochromic smart glass: $150 to $3,000 per window
• Solar window screens: $100 to $480 per window

These window costs don’t include professional installation services. Labor cost is typically $100 to $250 per window.

Window Replacement

Window replacement typically costs between $400 and $1,000, depending on the type & material.

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Window Repair

Leak repairs may cost $50 to $150, while more critical issues like frame damage can cost up to $1,000.

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Energy Efficient Glass

Upgrading your home’s windows with double or triple-pane glass may range from $700 to $2,000+.

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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 makes sure windows are installed properly and that there are 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.

Are There Alternatives to Sun Blocking Windows?

Many homeowners can experience sticker shock when it’s time to buy windows, especially sun blocking windows. While most window companies offer financing options and 0% interest promotional periods, the cost can still be surprising. There are alternatives to sun blocking windows and window films if you would like time to save for the expense, don’t want to obstruct the view out of your windows, or want to go a different route for aesthetics. 

Some alternatives to sun blocking windows include:

• Insulated cellular shades: Insulated cellular shades are one of the best window coverings to keep heat and sunlight out of your home. This can reduce heat loss by 40% or more, according to Energy Star.
• Roller and Roman shades: These window coverings roll or fold up when raised or lowered. The heavier the fabric, the better the thermal performance. However, they only offer slight benefits for insulation.
• Blinds: Opting for highly reflective blinds can help to reduce heat gain and glare, while still allowing daylight to light a room.
• Window quilts: This alternative to sun blocking windows offers similar benefits to insulated cellular shades, but they tend to be less inexpensive. However, they are more complicated to operate.
• Curtains: Medium-colored drapes and curtains with white plastic backings can reduce heat gains by up to 33% during the summer, according to Energy Star. 
• Exterior roller shutters: Exterior shutters provide protection from the sun and weather, while also adding privacy and security to a home.
• Awnings: Awnings can reduce solar heat gain in the summer by up to 77%. They provide shade to outdoor spaces while also reducing heat and glare inside. However, if they’re not retractable, they can increase energy used for heating the home.

So, Are Sun Blocking Windows Worth It?

Investing in the right high-performance sun-blocking windows can improve your comfort in hot climates and reduce cooling costs and electricity bills.

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.