Warmer Winters & Cooler Summers

San Antonio Attic Insulation

Do you need new insulation in your San Antonio attic? Are your cooling and heating bills getting out of hand? We have solutions for you.

Green Energy of SA installs radiant barrier attic insulation in San Antonio and the surrounding areas. Radiant barrier insulation is the latest and greatest in attic insulation technology and reflects up to 97% of the heat making its way into your attic. Save money and take advantage of the best attic insulation in San Antonio by choosing Green Energy of San Antonio.

Our Attic Insulation Options


Blown-In Insulation

Blown-in insulation (sometimes called blow in insulation) comes in bags and is loosely filled blotches of fiberglass that insulates your home. It largely resembles the lumps of cotton found inside pillows. It’s called blown-in insulation because it is most commonly blown into an attic through a special insulation blower, which has a long, wide hose that shoots the insulation through your attic like snow. There are three types of insulation options available for your attic: radiant barriers, blown-in insulation, and batt insulation.

Did you know that if your San Antonio attic isn’t properly insulated you could be throwing away hundreds of dollars every year? Let us check your insulation levels in your attic for FREE!

Register using the form below to sign up and also receive an estimate for Green Energy Radiant Barrier, the most modern form of insulation!

Green Energy of San Antonio also offers attic ventilation solutions to make sure the airflow in your home is installed properly.

Our San Antonio Service Areas Include: Universal City, Boerne, Canyon Lake, Cibolo, Kerrville, New Braunfels, San Marcos, Schertz, Seguin, Wimberly and more. Contact us today to see if we service your area!

blown in attic insulation in San Antonio

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Radiant barrier insulation in San Antonio

Radiant Barrier

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Thermal Reflectivity: Radiant barrier reflects up to 97% of the sun's radiant heat, while blown-in insulation only absorbs and slows heat down. 
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Energy Efficiency: Radiant barrier can help reduce the amount of energy needed to cool your home, as it keeps the heat out during the summer months.
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Increased Lifespan: Radiant barriers can last for up to 25 years, whereas blown-in insulation may need to be replaced after just a few years.
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Reduced Maintenance: Radiant barrier does not require any maintenance, while blown-in insulation may need to be adjusted or replaced over time.
blown in attic insulation in San Antonio

Blown-In Insulation

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Cheaper Initial Cost: Blown-in insulation is generally less expensive than radiant barriers, both in terms of material and installation costs. 
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Noise reduction: Blown-in insulation can help reduce sound transmission from outside the home, while radiant barrier does not provide any soundproofing benefits.
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Flame Resistance: Blown-in insulation can provide better fire resistance, as blown-in insulation typically contains fire retardants not found in radiant barriers. 
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Keeps Heat In: Blown-in insulation can be more effective than a radiant barrier during the colder months, as it can help retain heat in the attic and in turn the home when it’s cold out. Unfortunately, this benefit can sometimes be a problem in the warmer months.

Radiant Barrier Attic Insulation

Radiant barrier insulation is the latest in attic insulation technology. Installed right under the roof to the 2×8, the purpose of radiant barrier insulation is to reflect radiant energy which heats up the roof and makes its way into the attic and the rest of the home.  This is different from blown-in attic insulation, which can be considered the old way of insulating attics. Think about it this way. Much like a flip phone used to be the latest and greatest technology, smartphones have since moved into being the most efficient way of communicating and the latest and greatest communication technology to have. Similarly, blown-in insulation used to get the job done but now there is a new and improved way of doing insulation — and that is Radiant Barriers. Blown-in insulation only slows down heat transfer. Radiant barrier insulation reflects radiant energy, reflecting up to  97% less heat.

Making the upgrade to radiant barrier attic insulation from blown-in insulation can help you save hundreds of dollars on your energy bills every year. Some studies show that radiant barriers can reduce the cost of cooling a home by up to 35% when used in a warm and sunny climate like San Antonio and the surrounding areas.

Learn more about radiant barrier insulation online so we can help you make the switch from blown-in insulation to radiant barrier attic insulation today!

Radiant barrier insulation in San Antonio

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Offer valid for projects of 1,300 sq ft or more.
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Green Energy Radiant Barrier vs Traditional Blown-In Insulation 

The major difference between radiant barrier insulation and blown-in insulation is that the radiant barrier reflects heat, while blown insulation absorbs it. In a hot area like San Antonio, it’s common for the attics of homes to reach more than 160 degrees Fahrenheit, especially in the warmer months. With radiant barrier insulation, you can expect the attic to be within 20 degrees of the outside temperature.  Where an uninsulated attic would easily reach 150-200 degrees or above. 

No matter how much blown-in insulation you fill your attic with, the heat in the attic will stay in the attic, absorbed into the insulation. This results in a much hotter attic, and in turn, a hotter home, than when compared to an attic insulated with reflective radiant barriers. 

Another reason that radiant barrier insulation is superior to traditional blown-in insulation is the difference in how much it requires to produce the desired result. One sheet of radiant barrier insulation is equivalent to 9 outwards feet of blown-in insulation. That means it would require 9 feet of blown-in insulation, stretching outward from the interior of the roof, to produce the same results as a sheet of radiant barrier insulation covering the same area. Not only does radiant barrier provide more effective insulation than blown-in insulation, but it also saves space in the attic so you can utilize more space for storage or anything else that you’d like to do with your attic. 

Looking at the fundamentals, radiant barrier insulation is the future of insulation technology. There’s no question that a radiant barrier is more effective in reducing the heat of an attic and home, as well as saving homeowners money on energy bills. As more homeowners learn about the benefits of radiant barrier insulation, it will become the new standard for insulating attics in San Antonio, just like blown-in insulation was for decades. Want to get ahead of the curve? Reach out to the team at Green Energy of San Antonio to learn more about our radiant barrier attic insulation installation in San Antonio and the surrounding areas. 

The Hazards of Foam Insulation

Foam insulation, particularly spray polyurethane foam (SPF) carries significant risks, including flammability and potential toxic emissions during a fire. Installation of SPF can release volatile organic compounds (VOCs), posing health risks such as respiratory problems and eye irritation, as noted by the Environmental Protection Agency (EPA). Furthermore, some foam insulations use environmentally harmful blowing agents and are difficult to recycle, posing long-term disposal issues. Given these concerns, alternatives like cellulose and radiant barriers are increasingly preferred for their safety, environmental sustainability, and effectiveness without the health risks associated with foam insulation. At Green Energy, we are dedicated to offering insulation solutions that enhance home comfort while ensuring safety and protecting environmental integrity. Green Energy of San Antonio DOES NOT offer spray polyurethane foam, even though it would be quite profitable. Our team has chosen safety over profit. 

What is insulation R-value?

R-value is determined by installing the number of bags per 1000 square feet to the desired height in inches when the insulation is settled and at the desired weight, determining the density. Green Energy of SA installs R-30 fiberglass blown insulation, which is 10.25 inches tall throughout your attic, with a weight of no less than .436 pounds per square foot.
The maximum that one bag can cover for R-30 insulation is no more than 65.4 square feet. Insulation is not sold by the inches, it’s sold by the amount of bags it takes to fill your attic up to the specified (R-30) R-value. Basically, the higher the R-value, the better the insulation. The R-30 insulation we use, for example, is better than R-19 insulation.
If a San Antonio insulation installer covers your attic with less than the minimum number of bags it needs, your attic will have a lower insulation R-value, which means you won’t get the same energy savings during the hot Texas summers. At Green Energy of San Antonio, we guarantee a quality job, with R-30 insulation properly installed in your attic.
Check out detailed information on AttiCat insulation here.

Does Radiant Barrier Insulation Have An R-Value? 

Since R-value is used to describe how quickly a product will absorb heat, radiant barriers have no r-value of their own. That’s because radiant barriers do not absorb heat — they reflect heat before it has a chance to make its way into your home. Since there’s no R-value to radiant barrier insulation, does that mean it’s inferior? Quite the opposite, actually: a radiant barrier doesn’t need an R-value as it does not absorb the heat. While traditional insulation is measured on how much heat it can absorb, the radiant barrier does not absorb heat so R-value is unnecessary to measure. When it comes to radiant barriers, R-value is not brought into question since the material reflects heat before it makes its way into your attic, as opposed to traditional insulation which traps heat within your attic. 

Attic Insulation FAQs

What is blown-in insulation?

Also known as blow in insulation, blown-in insulation typically comes in bags and is loosely filled with blotches of fiberglass that insulate your home. Its name comes from the fact that it is commonly blown into an attic through a special insulation blower.

Will adding attic insulation to my home save me money?

Yes, in a sunny climate like San Antonio's, having attic insulation can help save you hundreds of dollars on your annual energy bills. If you're interested in having us check the insulation levels in your attic for free, contact Green Energy of San Antonio. We'll let you know whether your attic is properly insulated or provide you with a free estimate for replacing your existing insulation.

What are the benefits of attic insulation?

With attic insulation, your San Antonio home will be warmer in the winter and cooler in the summer. As such, homeowners can expect to save hundreds of dollars on electricity bills per year.

Why is radiant barrier insulation better than blown-in insulation?

Several reasons make radiant barrier insulation superior to standard blown-in insulation, starting with how these two insulating materials function. Blown-in insulation absorbs and traps heat that makes its way into the attic, while radiant barrier insulation reflects it before it can get into the attic. Since blown-in insulation absorbs heat, it heats up, and that heat remains trapped in the attic. But with radiant barrier insulation, that heat is reflected, resulting in a much cooler attic and home, and lower energy costs as the overall efficiency of your air conditioning system will be improved. 

Additionally, it requires less radiant barrier than it does blown-in attic insulation to properly insulate an attic. One sheet of radiant barrier insulation is equivalent to 9 outwards feet of blown-in insulation. With radiant barrier insulation, you can still use your attic for storage, and even living thanks to the reduced temperatures, whereas blown-in insulation takes up a lot of space and still keeps the attic hot.

Does my existing attic insulation need to be removed before adding new insulation?

While it's not always essential to remove existing attic insulation before installing new insulation, certain situations may require complete removal. If the insulation is over 10 years old, has been exposed to excessive moisture, or has allowed pests to infiltrate the attic, removing the insulation may be necessary. This is because blown-in insulation can potentially contain harmful bacteria, mold, mildew, and insect or animal nests. Additionally, old insulation can settle and compact over time, which can negatively impact the effectiveness of new insulation. Green Energy of San Antonio can assist with the removal of old insulation when installing new insulation of either type we offer. 

What types of attic insulation does Green Energy of San Antonio install?

At Green Energy of San Antonio, we install two different types of attic insulation in San Antonio and the surrounding areas: radiant barriers, and blown-in insulation. While these are both excellent choices for insulating your attic, both types of insulation have some advantages over each other. Generally speaking, we recommend radiant barrier insulation for new insulation installs due to the increased effectiveness of radiant barriers in warmer climates like San Antonio when compared to blown-in insulation. 

Does blown-in insulation cause mold growth?

At Green Energy of San Antonio, we use AttiCat Expanding Blown-in fiberglass insulation which does not absorb moisture, and therefore, does not allow for the growth of mold. Learn more about AtticCat Insulation here.

What is the importance of insulating my attic? 

Attic insulation is essential for a variety of reasons, including:

  • Energy Efficiency: A properly insulated attic can significantly improve the energy efficiency of a home by reducing heat transfer between the attic and the living space. This means less heat is lost during the winter and less heat gains during the summer, which can result in lower energy bills and a more comfortable living environment.
  • Comfort: Proper insulation can help maintain a more consistent temperature throughout the home, reducing hot and cold spots and increasing overall comfort.
  • Indoor Air Quality: Insulation helps to prevent air leaks and drafts, which can reduce the amount of outside pollutants and allergens that enter the home. 
  • Environmental Sustainability: Adequate insulation can help reduce a home's carbon footprint by reducing energy consumption and greenhouse gas emissions.

Insulating your attic with either kind of insulation offered by Green Energy of San Antonio offers a number of benefits in terms of comfort and cost-savings. 

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- Richard Ramos, Owner

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