What are normal crawlspace humidity levels in Northwest Arkansas?

Although the northwest corner of Arkansas is lucky to have lower natural humidity levels than the rest of our state, we still have to deal with a decent amount of moisture in the air. There’s a few reasons why.

First, let’s look at the average humidity levels across the state. It varies widely, and it will give you a baseline to compare the moisture levels within your crawlspace.

Northwest Arkansas’s weather is slightly drier and cooler than the rest of the state, primarily because it is further north (around 250 miles from the southernmost parts of the state) and at a higher elevation (around 1,400 ft as opposed to 250 ft in most of the Arkansas Delta). NWA also gets less rain (around 45 inches/year as opposed to 50 inches/year) but more snow (8 inches/year as opposed to 3 inches/year).

Because of these factors, Northwest Arkansas usually sees a dew point (indicative of humidity level) that is several degrees cooler year round.

Fayetteville’s dew point in the summer months is around 65-67 F, compared to Little Rock’s 70-71 F. The relative humidity level in Fayetteville is usually around 69%.

That said, especially when you’re comparing to other regions in the United States, Northwest Arkansas still has more moisture than places like Colorado or Arizona.

So how do you know what the proper humidity level for your crawlspace is?

A good rule of thumb is that humans feel comfortable in a humidity level between 30 and 60%.

It’s usually pretty easy to avoid moisture problems when you live in a place like Denver, but moisture can be a problem in the rest of the country. Usually, it’s advised to target a 55% moisture level.

The way vapor barriers work, the plastic that is wrapped around your crawlspace walls, piers, and ground helps create a barrier against moisture coming up from the ground and in from the sides. Since your home’s A/C unit dries out the air as it cycles, this vapor barrier essentially extends the A/C’s dehumidifying properties to your crawlspace.

The result is a drier crawlspace, a more efficient heating & cooling setup, and less moisture problems.

In extremely bad situations, you may need to install a dehumidifier unit in your crawlspace, but this is usually preventable by a good vapor barrier installation and proper drainage.

Since we’re local to Northwest Arkansas, and work solely in the installation of vapor barriers to prevent excess humidity in your crawlspace, Moisture Company can take humidity readings in your crawlspace and advise the best course of action to avoid the problems that can come from high humidity levels.

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