Worker with insulation

Is your old attic insulation no good?

Find out from the insulation pros at Greencat.


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Looking to improve your home comfort and energy efficiency? Upgrading your attic insulation is a great place to start, and one of the best ways to make the biggest difference in your California home.

But to be effective, attic insulation replacement jobs have to be done correctly, and that often starts with removing the old insulation in your attic and cleaning the space out so that it’s ready for new insulation and air sealing to be properly installed. Greencat professionally removes old insulation safely and effectively in homes throughout all of California, including Los Angeles, Orange, Western Riverside, and Western San Bernardino Counties as part of our insulation upgrade services.

Why Would Attic Insulation Need to Be Removed?

  • Ruined by water or moisture

  • Growing mold

  • Destroyed by pests or rodents

  • Compressed or damaged

  • Old and no longer effective

There are many reasons why your home’s current insulation may need to be professionally removed and replaced. If your insulation has been exposed to moisture or stepped on and compressed, it will no longer perform effectively in slowing heat moving in and out of your home. Insulation can also become moldy or covered in animal waste, which can create indoor air quality problems and a less healthy home. Contaminated insulation can pose health risks, which is why it’s not a good idea to remove the insulation yourself.

Finally, insulation can simply lose its R-value (how well it insulates your home) over time as it ages. Depending on the type of insulation you have (like fiberglass batts, cellulose, spray foam insulation, or some combination), your insulation might last anywhere from several decades to 100 years under perfect conditions. Unfortunately, however, the average house has far from perfect conditions, and insulation often needs to be replaced or upgraded much sooner.

Can New Insulation Just Be Added on Top of Old Insulation?

This is a question we get often from homeowners who are looking to save money on home improvement work. In some cases, if there is nothing wrong with your current attic insulation, and it’s just not installed properly or there isn’t enough of it, then yes, new insulation can be added on top of the old insulation. But if your insulation has been exposed to moisture, animal waste, or mold, then it’s ruined and needs to be professionally removed and replaced.

Insulation upgrades are also a great time to perform air sealing to close up tiny cracks and gaps in your home that are letting air in and out. But it’s difficult to air seal properly without completely removing the existing insulation to see where air leaks are—another reason why it can be best to start from scratch with new, high-performing insulation materials.

Signs You Need Your Attic Insulation Removed and Replaced

So, how can you tell if the insulation in your attic needs to be removed? While the way to be absolutely sure is to have your home inspected by an insulation specialist, here are a few signs that you could benefit from removing and replacing your attic insulation:

  • Rising energy bills

  • Uneven indoor comfort levels (some rooms worse than others)

  • Evidence of rodent or pest infestation

  • Roof leaks or other signs of moisture intrusion 

Still not sure if your insulation is bad or not? An energy assessment with Greencat can give you the best look at your home performance. An energy assessment, sometimes called an energy audit by other insulation companies, is a comprehensive evaluation of your home. Using blower door testing and infrared cameras, we can measure how well your insulation is currently performing and identify particularly weak areas for improvement, like your attic or your exterior walls.

Upgrade the Insulation in Your Home the Right Way With Greencat

It’s important to find the right insulation contractor for your California home, so you can be sure that the work is being done correctly for long-lasting comfort and energy efficiency in your house. Since 2008, Greencat has completed over 20,000 projects throughout the state, helping thousands and thousands of homeowners stay more comfortable in healthier homes. 

Let California’s insulation professionals handle your insulation upgrades. Call 323-208-9071 or contact us today for a free attic insulation removal quote.

What Our Customers Are Saying About Greencat

  • Very hardworkers, professional and nice, did the work without any problem. Great customer service, neat. I would use their service again and would refer them to friends and family.

    - Temeka L.
  • Thank you so much. Service that was provided was done excellent. Very happy and satisfied.

    - Teresa P.
  • I was very happy to see and talk to the men who came to do the work on my attic. They were kind, respectful and quick. Answered all my questions and were efficiently working throughout the whole time. Very nice. I am so happy I had this done. Thank you!

    - Stephanie A.
  • I thank you for your service. Your guys did a great job!

    - Salvador C.
  • The service by Greencat is a great way to improve homes. The service received today by Victor and Jose was awesome. They were very pleasant, friendly and explained the process, and answered all our questions.

    - Rudy G.
  • Enrique and Edgardo arrived on time and were very very friendly, polite and respectful. They went right to work, did an amazing job and cleaned everything up and left it better than it was before!

    - Patricia G.
  • I love your company, Greencat. The workers are nice and hard working. They explained work in detail. They completed work nicely. They took care of my place. Thank you.

    - WooJoung K.
  • Greencat come to my home early and prepared to get the service done in a timely manner. They were professional, polite and did a great job prepping and cleaning up afterwards. I am thankful I decided to move forward with the services.

    - Marguerite H.
  • Greencat came to my home today and did a great job in my home. The techs were fast and professional. I'm excited for my home to be more cozy in the winter and fresher in the summer. Thank you!

    - Sagrario S.
  • The guys that came by today from Greencat were very professional, polite and fast. The work was clean and they answered any question I had. Thank you Greencat!

    - Erica S.
  • You guys did a wonderful job. Thank you guys for not leaving a mess. Also for being nice to us. Overall, I love you guys. Job is 10 out of 10 rating.

    - Jonathan C.
  • The techs that came in and did the installation did a really good job. Quick, clean, professional. It couldn't have been better. We'd recommend them to others!

    - Andres C.
  • Thank you for your service and professionalism. I appreciate the work you guys have done for us. Great service!

    - Alejandra B.
  • We are very pleased and thankful and also with your great staff in completing the job. Very nice, professional and respectful. 

    - Luis A.
  • The service was great. It was fast and easy. They arrived early and were kind. This service will allow our home to be cooler during the summer. It is great.

    - Leticia S.
  • Thank you so much! Our house runs super hot and cold in the winter. Your workers who came to gate were excellent. Within minutes the truck pulled up, both employees ready to do their job. Fast and efficient. Friendy and polite. Thank God for this program.

    - Jody L.
  • Greencat is a great company, the service they are giving us is perfect. The workers are very polite and out-going. They came and finished very fast. Just want want to thank them for taking their time to come out today. We really appreciate it.

    - Julio A.