Blown-in Insulation for Your Existing Walls

If you’re like most Southern California homeowners, you’re always looking for ways to save energy and lower your utility bills. One way to do that is by adding insulation to your home. Blown-in insulation is a great option for existing walls, and we can do relatively easily it and affordably. In this blog post, we’ll show you how blown-in insulation works and what you need to know before you get started.

Man checking the house heat loss with thermovision camera indoors
Thermal image of energy loss.

How Blown-In Insulation Works in Old Walls

Blown-in insulation is made of small pieces of fiberglass, cellulose, or other materials that are blown into the wall cavity using a special machine. The material expands as it’s being blown in, filling all the nooks and crannies in the wall cavity. This creates a tight seal that prevents heat from escaping in the winter and entering in the summer.

Benefits of Blown-In Insulation For Your Homes Walls

There are several benefits to blown-in insulation, including:


  1. It’s easy to add to existing walls.

  2. It’s less expensive than other types of insulation.

  3. It can be used in hard-to-reach places.

  4. It’s effective at preventing heat loss and gain.

  5. It’s eco-friendly because it’s made of recycled materials.

  6. It doesn’t attract pests like some other types of insulation (e.g., fiberglass).

  7. It’s fire resistant. 

  8. It doesn’t settle over time like fiberglass insulation can.

  9. It has a higher R-value than fiberglass insulation, meaning it’s more effective at preventing heat loss/gain. 

  10. Installation is quick and easy – most jobs can be completed in one day!

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Things to Consider Before You Install Wall Insulation

Before you install blown-in insulation, there are a few things you should keep in mind: 


1) The type of material you choose will affect the R-value (i.e., the ability to resist heat flow) and the cost of the project; 

2) The size of your home will also affect the cost; 

3) You’ll need to have access to the attic or crawl space where the work will be done; 

4) You’ll need to rent a special machine to blow the insulation into the wall cavities; 

5) Make sure you wear protective gear, such as gloves, goggles, and a dust mask, when handling and installing the material; 

6) You may want to hire a professional insulation contractor if you’re not comfortable doing the work yourself.

Pink and brown fiberglass insulations during house construction
Improper batt insulation in a wall cavity. Providing a cold spot, that blown in insulation fixes.

Wall Insulation Conclusion

Adding blown-in insulation is a great way to save energy and money on your utility bills. The process is relatively quick and easy, and it can be done affordably with minimal disruption to your home life. Keep in mind that you’ll need access to the walls where the insulating will be done, as well as a special machine to blow the insulation into place through the holes. Make sure you wear protective gear when handling and installing the material, and consider hiring a CA licensed and insured insulation contractor if you’re not comfortable doing the work yourself. With these tips in mind, you’re sure to enjoy all the benefits that blown-in insulation has to offer!

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