Have you ever walked into your home on a hot summer day and noticed a musty smell that seems to come and go?
Many homeowners assume it is just part of living in an older home. Others try air fresheners or candles to cover the odor. While those may temporarily mask the smell, they do not address the reason it is there.
A musty odor is often your home’s way of telling you that excess moisture is present somewhere, and in many cases, the source is the crawl space.
Why does the smell get worse in the summer?
Summer brings higher temperatures and higher humidity. Warm air can hold more moisture, and that extra moisture often finds its way into crawl spaces.
If the crawl space is damp, humid, or has standing water, the smell can become much more noticeable during the warmer months. As air naturally moves throughout your home, those odors can travel from beneath the house into your living space.
That is why many homeowners notice the smell upstairs even though the problem is below them.
What causes a musty smell?
A musty odor is usually caused by excess moisture. That moisture can lead to conditions such as:
- Damp wood framing
- Mold or mildew growth
- Wet insulation
- Standing water
- High humidity levels
Even if you cannot see these conditions, you may be able to smell them.
It is not always mold
One common misconception is that every musty smell means there is mold.
While mold can certainly produce odors, other moisture related conditions can create a similar smell. Wet wood, damp soil, and stagnant air can all contribute.
That is why it is important to identify the source of the moisture instead of assuming what is causing the odor.
Other signs to watch for
If you notice a musty smell, look for other clues that your crawl space may be holding moisture.
These may include:
- Floors that feel damp or humid
- Condensation on pipes or ductwork
- Sagging insulation
- Standing water after heavy rain
- Increased humidity inside the home
- Wood that appears darkened or shows signs of deterioration
The more of these signs you notice, the more likely it is that moisture is affecting your crawl space.
Why solving the moisture problem matters
Ignoring moisture does not usually make it go away. Over time, excess humidity can affect wood framing, insulation, indoor air quality, and the overall comfort of your home.
By identifying the source of the moisture early, you can often prevent more extensive repairs later.
The solution is not covering up the smell
Air fresheners and odor absorbing products may temporarily improve the smell inside your home, but they do not remove the moisture causing the problem.
The long term solution is to identify where the moisture is coming from and address it. Depending on the home, that may include improving drainage, installing a vapor barrier, adding a sump pump, or controlling humidity with a crawl space dehumidifier.
Peace of mind starts below your home
A clean, dry crawl space does more than eliminate unpleasant odors. It helps protect your home’s structure, supports better indoor air quality, and creates a healthier environment for your family.
If you have noticed a musty smell that seems stronger during the summer, it may be time to take a closer look beneath your home.
At Dunwell Structural Repair, we offer free inspections to help homeowners identify the source of moisture and recommend the right solution. Call 336.867.0298 or visit dunwellsr.com to schedule your inspection.