Single-Pane vs. Double-Pane Windows

Windows are more than just design elements. They play a vital role in the home’s energy efficiency. According to the U.S. Department of Energy, 30% of the home’s heating energy gets lost through the windows, and 76% of the sunlight hitting standard windows passes through to heat the interior. In other words, windows affect energy efficiency in each season and every climate. 

You also need to consider other factors when choosing windows. Durability, warranties, design, color, and cost will all play a role. You should also understand the difference between single and double-pane windows and the benefits and drawbacks of each. 

Single-Pane Windows

Once the standard in residential homes, single-pane windows are now rarely considered in new structures. Though they lack the durability of newer windows, they have a classic, delicate look that some homeowners appreciate, especially if they want to preserve the original ambiance of a historic home. 

Pros

Single-pane windows still have a few advantages.

• Cost: Single-pane glass used to be more widely utilized because it was a cheaper option. Any remaining single-pane products are less expensive than double or triple-pane models.
• Appearance: Single-pane windows have a classic look that many homeowners value. 
• Maintenance: These products are easier to clean and repair than their thicker, multi-pane peers.

Many homeowners keep their single-pane windows because it’s expensive to replace them.

Cons

Single-pane windows have a vintage appeal, but they do not put much between the inside of the home and the elements. Here are the drawbacks to consider.

• Lack of efficiency: Heat and cold pass through thin glass with little resistance. The lack of insulation can have a huge impact on heating and cooling costs. 
• Poor noise insulation: Sound passes through single-pane glass as easily as temperature. People inside the house will hear everything from street noise to early-morning birdsong. 
• Durability: The glass can shatter easily. What’s worse, anyone who wants to enter the home merely has to break through a single piece of glass. 

The repair costs, security issues, and lack of efficiency can make single-pane windows expensive to own even though their initial price tag is low and the cost of replacement is steep. 

Improving Single-Pane Windows

Window replacement for single-pane glass can be a good investment because of the long-term energy savings, increased security, and longevity of double-pane glass. 

However, you can take steps to improve your current windows if replacement isn’t an immediate option. 

• Window coverings: Heavy-duty curtains, blinds, or shades improve insulation and keep cold from entering the home. They can also block the sun from heating the home’s interior in the summer.
• Weatherstripping and caulking: Condensation and noticeable drafts could signal a poor air seal around the window. Weatherstripping and caulking around the frame or even the sashes can stop air from leaking in and out. 
• Insulated window film: You need to consider insulating your single-pane windows. Transparent film products can reduce heat transmission in summer and limit cold from passing through the glass in winter. Such products can serve as an alternative to double-pane replacement. 

You can also make seasonal adjustments, such as getting a window covering or film that wraps around the entire frame during the winter to limit heat loss.  

Double-Pane Windows

As the name suggests, double-pane windows have two layers of glass. In between the two panes is a sealed air or gas chamber that further enhances the insulative properties. 

Double-pane windows are popular for homeowners seeking better insulation and more durability. According to HomeAdvisor, double-pane windows can increase energy efficiency by 24% in winter and 18% in summer. According to the Department of Energy, replacing single-pane windows with Energy Star-certified double-pane glass will lead to annual savings of $125 per year in California. 

Because of their benefits, window remodeling in places like San Diego is a popular option for value and comfort. Here is a closer look at the benefits and drawbacks of the most popular window options. 

Pros

The advantages of double-pane windows show why they are currently the product of choice for new constructions and window replacement projects.

• Insulative properties: Because of the thickness and construction, these windows insulate better than single-pane windows. They reduce heating and cooling costs and can limit solar gain. These windows are effective in extreme climates, saving homeowners up to $340 per year, according to the Department of Energy. 
• Sound control: Double-pane windows provide a solid barrier against outside noises. Double-pane glass can reduce traffic noise by 46% to 57% versus single-pane. 
• Durability and security: Double-pane windows are not as delicate as their single-pane peers. They last longer and may come with longer warranties. They are also not easy to break, especially if you add enhancements like shatterproof film. 

The energy efficiency of double-pane windows allows you to get a return on your investment with heating and cooling savings. The change is even worthwhile in a pleasant climate like San Diego. 

Cons

Double-pane windows offer significant advantages, but if you consider all the factors of window replacement, you will find a few drawbacks. 

• Cost: Double-pane windows are more expensive than single-pane windows. Window replacement represents a significant investment that some people may not be able to undertake without financing. 
• Quality: The double pane itself does not ensure quality. You need to be sure you get a good product, backed by a warranty and installed by contractors with the right skill set. 
• Seal failure: One of the biggest issues with double-pane windows is seal failure. If the seal between the panes fails, you can get condensation and moisture inside the window, creating foggy glass and reducing efficiency benefits. 

Some window installers offer triple-pane glass, which is generally better than double-pane windows for efficiency and noise reduction. However, these products are more expensive, so it’s essential to weigh costs versus benefits. 

Improving Double-Pane Windows

You can enhance the benefits of double-pane windows by making improvements that bring even greater efficiency.

• Sealed windows: Tightly-sealed windows create an airtight barrier that maximizes energy efficiency. You can add caulk around the frame or use weatherstripping under the window, if appropriate. 
• Low-E coatings: Low-emissivity (low-E) glass coatings are another valuable enhancement for double-pane windows. These coatings help to minimize heat transfer, allowing natural light without solar heat gain.
• Window treatments and coverings: While not directly related to the windows’ construction, the right window treatments and coverings can significantly enhance their efficiency in summer or winter. 

The type of improvements you need will depend on your location and the local climate. 

Choosing the Best Windows for Your Home

You can choose the window style that best fits your needs and tastes. Design is a vital factor considering windows affect both interior and exterior appearance, and you will have them for years. 

Here is a look at the most significant factors to consider when selecting windows for your home.

• The local climate and energy efficiency needs,
• Style and color,
• Durability and maintenance requirements,
• Length of warranty,
• Noise reduction qualities,
• Size.

You can get a professional consultation to help with the decision-making process and ensure you get the most out of your investment.