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Should a Crawl Space Be Insulated – Is It Needed?

For some homeowners, insulating a crawl space is an afterthought. This space can very well go under the radar, as we’re not spending a terrible amount of time there. Out of sight, out of mind, right?

But this oversight can sometimes lead to issues that are easily felt by you and other household members, even if you can’t see them at first glance. The crawl space is an integral part of a home’s ecosystem, and when utilized (and secured) properly, it can be immensely helpful in regulating air temperatures and improving the energy efficiency in your home, amongst other things.

So, let’s answer the question: do you need insulation in the crawl space?

Should You Insulate Your Crawl Space?

The simple answer is you should definitely consider it. Here are telltale signs that insulating the crawl space can be a good idea.

  • Mold and moisture accumulating on the walls
  • Musty odors coming from the crawl space
  • Lots of dust and pollution in the air in your home
  • Signs of pests and animal activity
  • High energy bills
  • Cold floors, especially in winter months

All of these symptoms can indicate that insulating your crawl space is the right move.

The Benefits of Insulating a Crawl Space

What are the most significant advantages of insulating a crawl space?

Mold Prevention

Uninsulated crawl space has no protection barrier against moisture. Too much of it accumulating regularly can be a birthing ground for mold. We want to avoid this at all costs, as mold and mildew can be toxic, especially to those with allergies.

Insulating your crawl space closes access for moisture to appear and cumulate, preventing mold from ever occurring.

Lower Energy Bills

Insulating the crawl space means protection from heat loss and cold air getting in through your floor. This small change can help you reduce your energy bills for years to come, making your AC and heating system more effective than ever before.

Prolonged Life of HVAC System

More negligible heat and cold losses result in your AC being more efficient without overburdening it, resulting in its longer usability and fewer repairs.

Better Air Quality

With no way to enter, there is less pollution and dust in your air indoors. Additionally, mold particles are out of circulation as well, which improves the air quality and your standard of life.

Pests Prevention

You can also cross out pests and animals and the damages they can cause from your list of worries. Insulating your crawl space cuts out the path for them to enter, protecting your house and the quality of your air from animal-based pollution and detriment.

Protection for Your Home’s Foundation

Finally, you can secure the space underneath your home by insulating it, reducing the debris, and keeping the area clean and dry. This will ensure easier check-ups and reduce the risks of damage to your home’s construction.


$300 OFF On Insulation Removal Services +
$350 OFF On Any New Insulation Installation

Are There Any Drawbacks To Insulating Crawl Space?

Not really, but in some cases, insulating might be unnecessary or burdensome to perform. This goes particularly for very small crawl spaces. If you have very little space underneath your home, you may not be at risk of experiencing significant heat losses, therefore, insulating your crawl space may become an excessive expense.

If you’re unsure whether insulation is something you should invest in, consult specialists. At Envirosmart Solution, we perform attic and crawl space insulation installations, and we will gladly assess your crawl space needs and offer you our expert advice.

Our services go beyond simple consultation. We will remove the old insulation and install the new one. Our trained and experienced technicians will be able to advise you on the best insulation materials and perform the installation in accordance with the highest standards so you can enjoy sufficient protection for years to come.


  1. Envirosmart Solutions, Understanding the Basics of Crawl Space Insulation
  2. Newsweek, 7 Advantages of Crawl Space Insulation
  3. Attainable Home, For Comfort And Savings: Do You Insulate Your Crawl Space?
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About EnviroSmart Solution

Envirosmart Solution is your go-to energy efficiency partner in Kent, WA, serving over 60 cities in the Washington Puget Sound area.

  • Established in 2004, we’re a family-owned business committed to providing top-notch service.
  • Our one-stop-shop approach covers energy audits, insulation upgrades, air sealing, HVAC, and more.
  • Dedicated and skilled team ensuring quality work without compromise.
  • Eco-friendly commitment using sustainable materials and practices.
  • Local, community-driven business deeply invested in supporting local initiatives.
  • Licensed, bonded, and insured, adhering to local codes and standards.

Choose Envirosmart Solution for a more energy-efficient, sustainable, and comfortable living space. It’s smart to choose Envirosmart!