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Do You Need A Crawl Space Dehumidifier?

crawl space dehumidifier
crawl space dehumidifier
ByMariel McClung
Table of Contents

Thinking your home’s crawl space might need a crawl space dehumidifier? If so, don’t hit that back button because you’ve landed on the right page.

A crawl space vapor barrier is also a lot of times referred to as a crawl space liner.

Crawl spaces aren’t always top-of-mind for homeowners, but they should be—neglecting your crawl space can have serious consequences for your home and health. High moisture levels in the crawl space environment create an ideal habitat for wood rot, molds, mildew, and pests. This can lead to costly repairs and present long-term health risks to you and your family. Fortunately, a crawl space dehumidifier is an easy solution that will help restore balance within this sometimes forgotten area of the home. In this blog post, we’ll look at why a crawl space dehumidifier is important and equip you with all the information necessary to decide whether one is right for you.

Why Does Crawl Space Humidity Matter?

Humidity in the crawl space under your home may seem minor, but it can lead to serious issues. When humidity levels are high, it can encourage the growth of mold and mildew, which can damage your home’s structural integrity and negatively impact your health. Additionally, high humidity can attract pests like termites and rodents, which thrive in damp environments. It can also lead to higher energy bills, as your HVAC system will have to work harder to regulate the temperature in your home. Taking steps to control crawl space humidity, such as installing a dehumidifier, can improve your home’s overall health and safety.

Signs Your Crawl Space Needs A Dehumidifier

The vapor barrier is a plastic sheet made of polyethylene.

So, how do you know if your crawl space is too damp? Here are some signs that you may need a dehumidifier:

  • You’ve noticed a musty or moldy smell in your home
  • There are water stains or discoloration on walls or floors
  • You feel dampness or humidity in the air
  • You have pest problems like cockroaches or termites.

Don’t ignore these warning signs—investing in a dehumidifier for your crawl space could save you a lot of trouble (and money) in the long run.

Benefits of Having a Dehumidifier in Your Crawl Space

Moisture can build up in the crawl space, leading to mold growth, wood rot, and other problems. However, investing in a dehumidifier can benefit the crawl space and the rest of the home. With the excess moisture removed, the air quality in the house will improve, reducing the risk of respiratory issues. Additionally, a dehumidifier can protect against damage to the wooden structures in the crawl space by preventing excess moisture buildup. By investing in a dehumidifier for your crawl space, you can ensure a healthier, safer, and more structurally sound home.

Crawl Space Dehumidifier FAQ

Does Every Crawl Space Need A Dehumidifier?

While not every crawl space requires a dehumidifier, it’s essential to assess the moisture levels in the area and determine if it’s necessary. Location and climate play a role in determining if a dehumidifier is needed. If you live in an arid region, you might not need a crawl space dehumidifier. However, if you notice musty odors or signs of dampness in your crawl space, consider investing in a dehumidifier to help prevent potential issues.

Does The Dehumidifier Need To Run All The Time In The Crawl Space?

The drain pipe will funnel water that accumulates in the crawl space towards the lowest part of the crawl space.

The answer to whether a crawl space dehumidifier must run constantly isn’t a simple yes or no. It depends on various factors, such as the size of your crawl space, the level of humidity, and your personal preferences. Some experts recommend running the dehumidifier constantly to maintain optimal levels of moisture control, while others suggest turning it off periodically to conserve energy. Ultimately, deciding what works best for your situation is up to you. One thing is for sure, though, a well-maintained crawl space with proper moisture control will help prevent mold and mildew growth and protect your home from potential structural damage.

What Is The Best Humidity Setting For A Dehumidifier In A Crawl Space?

Setting your dehumidifier to the right humidity level is key to keeping your crawl space free from excess moisture. The ideal range is between 30-50%, depending on the climate and location of your home. However, it’s essential to regularly monitor the humidity levels and adjust the setting accordingly.

How Long Does A Crawl Space Dehumidifier Take To Remove Moisture?

The answer to this question depends on a few factors, such as the space’s size, the humidity level, and the dehumidifier’s power. Generally speaking, you can expect a good-quality dehumidifier to reduce the moisture level in your crawl space within a matter of hours or a few days, depending on the severity of the issue. Of course, it’s always best to consult a professional to assess your situation and determine the best course of action for your home.

Where Does The Water Go From The Crawl Space Dehumidifier?

Typically, crawl space dehumidifiers have a discharge line that carries the collected water away from the foundation. So if you’re maintaining a crawl space dehumidifier, keep an eye on the discharge line and ensure it’s functioning correctly.

What Happens When The Crawl Space Dehumidifier Is Full Of Water?

Factors such as location and climate play a role in determining if a crawl space dehumidifier is needed. If you live in an arid region, you might not need one.

Choosing the right condensate removal system is essential if you want to keep your crawl space dry. Both a gravity drain system and a condensate pump system have their advantages, but it ultimately comes down to what will work best for your specific situation. A gravity drain system can be a cost-effective option, relying on the natural force of gravity to move the condensate out of the crawl space. On the other hand, a condensate pump system can be more reliable and efficient, especially if your crawl space is below the drain level.

What Are The Disadvantages Of Crawl Space Dehumidifiers?

If you’re considering adding a crawl space dehumidifier to your home, weighing the pros and cons is important. While there are benefits to installing a dehumidifier in your crawl space, there are also some potential disadvantages to be aware of. One of the biggest drawbacks is the cost – dehumidifiers can be expensive to purchase and install. Additionally, they can require frequent maintenance and repairs to keep them running effectively. Despite these drawbacks, a crawl space dehumidifier can still be a valuable investment for many homeowners.

If you’re thinking about a crawl space dehumidifier for your Hampton Roads home, contact AMC911 today to schedule a crawl space evaluation and receive an estimate.


Mariel McClung

Mariel McClung is AMC911’s Vice President and full-time mother. Mariel studied Marketing at The College of William & Mary and is the operational brain behind AMC911.

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