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Are Crawl Spaces Insulated?

In another article, we addressed whether it’s best to waterproof your crawl space with encapsulation or insulation.

This article will answer the question, “Are Crawl Spaces Insulated?”

Let’s jump right in!

Are Crawl Spaces Insulated?

Most building codes require insulation in areas like crawl spaces. It is usually placed between floor joists or on walls. This material is essential for temperature regulation and energy efficiency in your crawl space and throughout your home, but it’s not without its problems.

failing fiberglass insulation in a damp crawl space

If your floors feel cold in the winter, you have higher-than-normal energy bills, or your HVAC struggles to maintain comfortable indoor temperatures year-round, don’t be quick to blame your home’s builders for faulty insulation. While some contractors cut corners and quickly install sub-standard insulation, certain materials react differently in different crawl space conditions.

Crawl space insulation is intended to protect your home from temperature fluctuations and moisture, but various materials easily succumb to moisture and excessive humidity. Many crawl spaces have open vents that allow outside air and water inside, creating damp conditions that cause the insulation to fail.

What Does Crawl Space Insulation Look Like?

crew installing foam board crawl space insulation

Crawl space insulation comes in all shapes, sizes, and materials. Here, we’ve listed the three most common forms you may see in your crawl space, ranking them from best to worst:

  • Foam board panels (the most effective, lasting type and the kind we install)
  • Spray foam (still slightly effective, but can be easily damaged)
  • Fiberglass (highly ineffective, harbors mold and pests, and does not belong in a crawl space)

What to Do Next

In this post, we answered your question about whether crawl spaces are insulated.

There’s a lot more to cover on crawl space insulation, so stay tuned for more informative articles!

If you need help with crawl space insulation, you can benefit from a free inspection from our expert team at Indiana Foundation Service. Just click the button below to get started!

Holly Richards-Purpura

Holly Richards-Purpura

Content Writer

Holly is a Content Writer for Groundworks who has written and edited web content for the foundation services industry for over 10 years. With a background in journalism, her passion for the written word runs deep. Holly lives in Columbus, OH, with her husband. Along with educating homeowners, she also has a big heart for the Big Apple.

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The company came out to inspect an issue at the house we were purchasing. They arrived prepared and advised us on a plan to correct a foundation problem. Unfortunately, the repair was left to the sellers to fix, and they chose another company. However, I would recommend their services based on the promptness and knowledge provided. Thank you for advising us about the potential settlement of the house.

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I knew we needed to have work done. One floor area was having issues. I'd seen TV ads for two companies. Called Indiana Foundation first….

I knew we needed to have work done. One floor area was having issues. I'd seen TV ads for two companies. Called Indiana Foundation first. They were responsive and had Doug C. scheduled to visit in a week. The office shared arrival time and how long the visit would take. He was on time and did not rush us. No high-pressure sales pitch. Doug photo-documented the areas needing attention. I had worked construction years back and could tell he was well versed in this area of business. So glad we called. Doug was great to work with. Mike S. Columbus, IN

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Jon Erfmeier Took amazing care of us when we had our foundation inspection prior to buying our home. His expertise helped us to make an Informed decision that has served as well. Highly recommend this company.

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Had Mark w/ Indiana Foundation. He was very through an explained all aspects of the repair.

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The crew that i had come out to my home was more that excellent. They were on time and responsive to my needs. Christian R. Was the job…

The crew that i had come out to my home was more that excellent. They were on time and responsive to my needs. Christian R. Was the job site manager and did his best to make sure everything was how i wanted it. The crew that was with him Chad B., Dillon A, and Travis R. Were extremely respectful with me and my family. They took the extra steps to make sure things were what I wanted. They all worked well together and was extremely impressed with how they kept the jobsite clean and my house clean as well. Would highly recomend this company and crew to anyone needing their services. If i do have any issues in the future i only have to make one call. Would also recomend this crew to any jobsite. Extremely knowledgeable and honest. Honesty is the key to any contractor coming into your home. Again thanks to the crew. It was a pleasure.

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So far super impressed with great service with this company. Bryan was on time and provided all the information we needed. He was also quick to respond to questions I had after the inspection. Keep up the good work.

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This team came to repair my Great Grandmother’s floor in her forever home. She is 91 years old, a widow and had no idea what to do when her …

This team came to repair my Great Grandmother’s floor in her forever home. She is 91 years old, a widow and had no idea what to do when her living room started sinking. This team of men came and completely transformed the living room back to normal again. Raising her floors back to the original placement, putting in extra hours and days to complete the job correctly! And cleaning up every pile of dust and piece of wood when they left. If I could give this company and these men 6 stars I would! Special shoutout to the foreman and his team Cole Parton, Brock Dietrich and Michael Robert’s! You guys were an absolute blessing to my mamaw who can enjoy her home again with safety and peace of mind! Also special thanks to Bryant and Chris. If you’re looking for the right company for your home repairs? You found it I promise.

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Mark G from Indiana Foundations was great. He was eager to listen, answer questions, honest, knowledgeable, and he was fun to talk to. I…

Mark G from Indiana Foundations was great. He was eager to listen, answer questions, honest, knowledgeable, and he was fun to talk to. I like a person who helps find solutions without being a pushy salesman. Indiana Foundations has great solutions at a good price.

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On 9/27 we had our 4th annual inspection of our crawl space and foundation done by your associate Ricky Christie. He was on time,…

On 9/27 we had our 4th annual inspection of our crawl space and foundation done by your associate Ricky Christie. He was on time, professional and complete. His thorough and painstaking inspection/presentation – which he documented completely – resulted in our signing up for substantial additional remedial work. He took his time, he did it right…I could wax on, but you get the idea. Thanks for sending out a great person.

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James, Saul & Devarion showed up very timely. James explained his thoughts on what they needed to do and updated me every step of their…

James, Saul & Devarion showed up very timely. James explained his thoughts on what they needed to do and updated me every step of their work. He asked me to come out and see what they were doing. He constantly asked if i had any questions or wanted something different done! They were very courteous: always please and thank you and maam! They made very little mess and cleaned up very well after themselves! Best experience i have had with Indiana Foundation!!! Would definitely recommend.

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Cameron was polite and truthful about the options available to us.

Cameron was polite and truthful about the options available to us.

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Mark Gladish was super professional and family friendly!!! He was on time and his work was very thorough. I would highly recommend and the…

Mark Gladish was super professional and family friendly!!! He was on time and his work was very thorough. I would highly recommend and the prices are reasonable for the process.

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We had Doug come look at our basement and he spent his time thoroughly inspecting all areas inside and out and even came with a smile on…

We had Doug come look at our basement and he spent his time thoroughly inspecting all areas inside and out and even came with a smile on his face!

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Doug was thorough, professional and explained everything well. Will recommend!

Doug was thorough, professional and explained everything well. Will recommend!

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Justin was nice, he was able to break everything down to where it was easy to understand. Did not speak to me like I was an idiot. Justin…

Justin was nice, he was able to break everything down to where it was easy to understand. Did not speak to me like I was an idiot. Justin was very respectful and professional and answered all my questions.

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Dylan Combs and Chris Thompson worked nonstop from the time they arrived at our residence. They were courteous and answered all of the…

Dylan Combs and Chris Thompson worked nonstop from the time they arrived at our residence. They were courteous and answered all of the questions that we had for them. We were pleased with their professionalism. Today we got a follow up from the company to make sure that all was OK and reminded us that they would follow up in a year to ensure that all was good. We have been happy with the company’s service overall.

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