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Your Guide to Relative Humidity

measuring the moisture in a crawl space

In a previous article, we tackled the question, “How to Dry Out a Crawl Space and Manage Humidity Levels?

Now, we’re going to take a step back and answer, “What is relative humidity?”

The answer is straightforward, so let’s dive right in.

What Is Relative Humidity?

Relative humidity measures the amount of moisture in the air compared to the maximum amount the air can hold at a given temperature.

It’s expressed as a percentage; for example, if the relative humidity is 50%, the air is holding half of the moisture it can at that temperature. Warmer air can hold more moisture than cooler air, so relative humidity changes with temperature fluctuations. Understanding relative humidity is important because high levels can lead to problems like mold growth, condensation, and wood rot, especially in areas like basements and crawl spaces.

How to Measure Relative Humidity and Protect Your Home

measuring the humidity against the basement wall

Measuring relative humidity in your home is easy with a hygrometer, a small device that reads the moisture level in the air. Hygrometers are inexpensive and can be placed in areas like basements, crawl spaces, or living rooms to monitor humidity levels.

High humidity can negatively affect your home by promoting mold and mildew growth, damaging walls, ceilings, and floors, and posing health risks.

Excess moisture can also cause wood to warp or rot, damage insulation, and create an environment that attracts pests like termites. Keeping an eye on relative humidity helps you take action before these issues escalate.

Understanding Relative Humidity & Its Impact on Your Home

In this post, we answered the question, “What is relative humidity?” We explained that relative humidity measures the moisture in the air compared to its maximum capacity at a given temperature. High humidity can lead to problems like mold, mildew, wood rot, and pest infestations, so keeping an eye on humidity levels is crucial for maintaining a healthy home.

There’s much more to learn about humidity’s impact on your home. In our next article, we’ll dive into the differences between wood rot and mold.

If you need basement or crawl space waterproofing, Foundation Recovery Systems offers a quick, easy, and completely FREE inspection—just click the button below to get started!

FAQs

The cost varies based on the size and condition of your crawl space, as well as necessary repairs. Foundation Recovery Systems offers free inspections, no-obligation quotes, and financing options to accommodate your budget.

Keeping humidity levels within 40-60% is crucial to prevent mold growth. For expert guidance on maintaining such levels, reach out to Foundation Recovery Systems.

A humidity range of 40 to 50 percent is optimal. Lower levels can cause uncomfortable dry air, while higher levels promote mold growth and other moisture issues. A professionally installed crawl space dehumidifier, combined with waterproofing and encapsulation methods, is essential. Contact Foundation Recovery Systems for a free inspection and estimate. 

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Ryan Howard explained the job thoroughly and calmed my nerves about the water coming my basement. He was extremely professional and…

Ryan Howard explained the job thoroughly and calmed my nerves about the water coming my basement. He was extremely professional and knowledgeable about the job. I would recommend Ryan H to anyone. What a great personality.

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Nathaniel Vonallmen was very professional. He explained all my options and didn't pressure me.

Nathaniel Vonallmen was very professional. He explained all my options and didn't pressure me.

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Sales manager Kevin Estes did a great job of inspecting my building and recommending appropriate solutions. He was friendly, professional,…

Sales manager Kevin Estes did a great job of inspecting my building and recommending appropriate solutions. He was friendly, professional, knowledgeable and a pleasure to work with. I hope the products perform as well!

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Adam came to our home to inspect potential foundation repairs and was extremely thorough, honest and knowledgeable. I have a much better…

Adam came to our home to inspect potential foundation repairs and was extremely thorough, honest and knowledgeable. I have a much better understanding of what is happening with our home and although repairs are not urgent at this time I have more peace of mind and knowledge about any future repairs that may need to take place. I cannot speak to the work that FRS does but in terms of a representative that will come to diagnose issues with your home, Adam is second to none.

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I had a great experience with Foundation Recovery Systems and especially with their Field Inspector, Ken Jordan. Ken was super thorough…

I had a great experience with Foundation Recovery Systems and especially with their Field Inspector, Ken Jordan. Ken was super thorough when inspecting my house, and he really took the time to explain what was going on and what needed to be fixed. What I appreciated the most was that he didn’t try to upsell me or push for anything unnecessary—just honest, straightforward recommendations. You can tell Ken knows his stuff, and he was professional while still being easy to talk to. I felt like I was in good hands the whole time. If you’re dealing with foundation issues and want someone who’s knowledgeable and trustworthy, ask for Ken Jordan. Highly recommend!

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Very happy with the work they did installing a sump pump in the basement. Colton and his crew had to navigate some logistical challenges &…

Very happy with the work they did installing a sump pump in the basement. Colton and his crew had to navigate some logistical challenges & did so very well with minimal demo. They were very open to my questions & concerns and explained everything clearly. Also did a great job cleaning up. Thank you Colton, Gage & Kyle! Thanks to Dalton as well for coming out to follow up.

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I'm so sorry, thank you for being one of the most professional team ever!

I'm so sorry, thank you for being one of the most professional team ever!

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I have never given a review before, but after hiring Foundation Recovery Systems to rise my garage floor I was highly motivated to do…

I have never given a review before, but after hiring Foundation Recovery Systems to rise my garage floor I was highly motivated to do so.The process started with Travis who came out to look at my garage floor and give me an assessment and quote. Travis is very friendly, professional, and educated me on my different options to fix my problem. After discussing my options with Travis I decided to purchase a poly-lift for my garage floor. Foundation Recovery's bid came in the middle of the 3 bids that I received, but I chose them because their warranty far exceeded the other 2 contractors, 5 years vs 2 years. But I also chose them because of Travis, just like working with him.On Dec 1st, Jeremiah and Jake came out to do the lift. They showed up on time and where also very friendly and professional. We discussed a few of my concerns and then they got to work. Took them about 3 hours to complete the work and afterwards they informed me of 2 other issues to keep an eye on, no footings under my garage posts and a foundation wall that may be moving. They also explained to me how to monitor both situations.Last thing, when Travis gave me the bid, he explained that the bid was good no matter how much material use. The other 2 contractors both stated that there would be additional fees if they exceed the amount of poly they estimated. I am so glad the I went with Foundation Recovery Systems, because Jeremiah & Jake reported to me when they finished that they used a lot more poly then they anticipated.Needless to say, if I ever need any sort of foundation work in the future I will be calling Foundation Recovery Systems. They not only met my expectations, they exceeded them. Thank you, guys!

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I had a WONDERFUL experience with Foundation Recovery Systems! I had just renovated my basement after thinking that I had taken care of any …

I had a WONDERFUL experience with Foundation Recovery Systems! I had just renovated my basement after thinking that I had taken care of any water issues, but after another bout of heavy rain it was clear I had not fixed the issue. Joe was so helpful and kind during our consultation. He was with me every step of the way as I prepared the basement for installation and made me feel so comfortable during the entire process. My foreman Greg and his crew, Andy, co-foreman and installer Cody were so communicative during the entire installation process, sending pictures and took the time to ensure that the rest of my house was taken care of. I truly felt like I was a valued customer and that I was receiving individual attention from each of the employees that I encountered at Foundation Recovery Systems. Their knowledge and expertise in combination with their customer service is unmatched!

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Tanner S, Tanner Z and Bryson Y did a great job on my project. They finished early, kept me informed during the work and made sure I knew…

Tanner S, Tanner Z and Bryson Y did a great job on my project. They finished early, kept me informed during the work and made sure I knew what was happening during each step.

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Trevor Atwell did a thorough job with the inspection. Did a walk through prior to, and a walk through afterwards. Also recommended…

Trevor Atwell did a thorough job with the inspection. Did a walk through prior to, and a walk through afterwards. Also recommended several other projects that Foundation Recovery could help me with.

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Eric S. was extremely helpful and professional when he came to evaluate my basement water problem. He was knowledgeable and dedicated to…

Eric S. was extremely helpful and professional when he came to evaluate my basement water problem. He was knowledgeable and dedicated to identifying the unusual issue, and he was straightforward about the best approach to fix it.

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Very respectful and friendly and trough. Communicated every step of the quote process as well as giving me information for all my options…

Very respectful and friendly and trough. Communicated every step of the quote process as well as giving me information for all my options moving forward. Would definitely recommend. Plan on moving forward with this company pending inspection from structural engineer.

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Friendly and knowledgeable employees-Chase, Chad, Matt and Tanner. Quality job, and they picked up the area when they were done.

Friendly and knowledgeable employees-Chase, Chad, Matt and Tanner. Quality job, and they picked up the area when they were done.

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Adam Elberger performed a foundation inspection on our home on November 17th. Adam was timely, professional, respectful, knowledgeable and…

Adam Elberger performed a foundation inspection on our home on November 17th. Adam was timely, professional, respectful, knowledgeable and very particular in performing the inspection and determined to arrive at the correct conclusion of any issues found. I would highly recommend Adam for any foundation issues.

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Trevor Atwell came out for a service visit today and addressed all of my concerns and provided me with peace of mind. He answered every…

Trevor Atwell came out for a service visit today and addressed all of my concerns and provided me with peace of mind. He answered every single question no matter how big or small that I had with great explanations and examples. His wealth of knowledge in the field is evident and I hope to see him for all future service visits.

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Tahlor Fowlkes came to our home today to give us an estimate to make our home's crawl space healthier. He was very kind, and knowledgeable….

Tahlor Fowlkes came to our home today to give us an estimate to make our home's crawl space healthier. He was very kind, and knowledgeable. I appreciate that he even recommended getting an estimate from a competitor so that we could feel confident that that we are getting the best price and he said that they would beat the competitor's price. Thanks again Tahlor.

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Called to get a quote on floor sagging and foundation repair. They sent Jared Wyatt out with in a week to do the inspection. He was really…

Called to get a quote on floor sagging and foundation repair. They sent Jared Wyatt out with in a week to do the inspection. He was really thorough, friendly, and professional. He went around took pictures and measurements to get an understanding of the lay out and what we were needing done. Sat down with us and listened to our concerns and explained in detail what our options were, what they would be doing. Went over and explained all of their different payment options they offered and they different discounts as well. Would recommend if you’re having the same issues.

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I had foundation recovery systems come out for two separate jobs in the last 2-3 years. Overall, I am pleased with the work that was done….

I had foundation recovery systems come out for two separate jobs in the last 2-3 years. Overall, I am pleased with the work that was done. There was some hiccups throughout the project, but they had one standout employee, Tanner Wetrich, who kept things on track. Almost 2 years after he completed one of the jobs, I reached back out with a question. He took it on himself to solve the problem and get things figured out. If you plan to have a job completed in the Iowa area, definitely ask for Tanner to be your representative.

Leah Leitow

Leah Leitow

Content Writer

Leah is a Content Writer for Groundworks with nearly ten years of experience working in the foundation repair industry. Her experience ranges from working with homeowners to find the right solution to training inspectors and staff. In her background as a Michigan journalist, she gained invaluable insight into people's lives throughout our state. Leah lives in metro Detroit with her husband and two sons.

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Moberly, MO 65270
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1625 Larkin Williams rd.
Fenton, MO 63026
(314) 207-9995