4 Common Crawl Space Issues and How to Fix Them

A crawl space is an often neglected area of a home that can have a significant impact on the overall health and comfort of the living spaces above it. However, crawl spaces are prone to various issues that can cause problems for homeowners. In this blog, we will explore 5 common crawl space issues and provide you with practical solutions to fix them. Whether you’re a homeowner or a contractor, this blog will give you valuable insights into how to keep your crawl space in top condition. So, let’s dive in and take a closer look at these common issues and how to solve them.

1. Old House Smell

“Old house smell” is a common issue that can occur in crawl spaces and is caused by mold. The musty smell is caused by the presence of mold spores in the air. As much as half of the air on the first floor of a home can come from the crawl space, so if there is mold present in the crawl space, the smell can permeate throughout the house. The mold can grow on surfaces such as wood, insulation, and ductwork in the crawl space.

Mold growth in crawl spaces can be caused by several factors such as poor ventilation, a leaking pipe, or high humidity. To fix this problem, it is important to address the source of the moisture that is causing the mold to grow. This may include fixing leaks, adding ventilation, or using a dehumidifier. Additionally, it is important to clean and remove any mold that has already formed and take steps to prevent future mold growth such as using mold inhibitors or encapsulating the crawl space. 

The last step would be to ensure water does not enter the crawl space going forward. This would require crawl space waterproofing or encapsulation techniques. 

Learn more about crawl space waterproofing 


2. Water Damage

Water damage is another common issue that can occur in crawl spaces. It can be caused by a variety of factors such as heavy rain, a broken pipe, or a high water table. Water damage in crawl spaces can lead to mold growth, structural damage, and other issues that can negatively impact the health and safety of the home.

To fix this issue, the first step is to pump the water out of the crawl space and dry it. The costs of wet crawl space repair will vary depending on the water source, cleanliness, and the affected area’s size. Clean water removal averages $500 to $1,500, with costs rising if the water is from a contaminated source. Once the crawl space is dry, it is important to assess what repairs are necessary.

In case of water damage, it’s crucial to identify the source of the water and fix the problem to prevent it from happening again. This may include fixing leaks, rerouting downspouts, or installing a sump pump. Additionally, it may be necessary to remove and replace damaged insulation, drywall, or other materials that have been affected by water damage. It’s also important to ensure proper ventilation to prevent mold growth.

3. Insulation Issues

Insulation is a critical component of crawl spaces, as it helps to keep the space warm in the winter and cool in the summer. Insulation in a crawl space also helps to prevent moisture and mold issues by reducing the amount of humidity that enters the space.

Insulation issues in crawl spaces can occur due to a variety of reasons such as age, pests, or improper installation. If the insulation in your crawl space is inadequate or damaged, it can lead to drafts, high energy bills, and can also create an environment for mold growth. Signs of insulation issues in crawl spaces include, but not limited to, high energy bills, musty smell, visible mold, and a feeling of dampness in the crawl space.

To fix insulation issues in a crawl space, you will need to assess the condition of your insulation and replace or add insulation as needed. You may need to remove old insulation and install new insulation to ensure that the space is adequately insulated and sealed. It’s also important to ensure that the insulation is installed correctly, such as ensuring that the insulation is tight against the walls, and that there are no gaps or holes. Additionally, it’s important to ensure proper ventilation to prevent moisture buildup.

4. Structural Issues

Structural issues are a common concern in crawl spaces. These issues can include foundation cracks, settling, and sagging, and they can be caused by a variety of factors such as poor soil conditions, water damage, or heavy loads. Structural issues in crawl spaces can lead to a variety of problems such as uneven floors, cracks in walls, and even potential collapse of the structure.

Signs of structural issues in crawl spaces may include cracks in the foundation, uneven floors, doors that stick or don’t close properly, and visible signs of settling or sagging. To fix structural issues in a crawl space, you will need to have a professional assess the condition of the crawl space and recommend a course of action. This will most likely include an installation of a floor support system with your crawl space

Some common solutions to structural issues in crawl spaces include underpinning, which is a method of strengthening the foundation by adding support beneath it. Additionally, it may be necessary to install additional support beams or reinforce the existing structure. It’s important to address structural issues as soon as possible to prevent further damage and to ensure the safety and stability of the home.


Don’t let crawl space issues go unchecked. Contact Helitech today for a professional assessment and solutions tailored to your specific needs. From old house smell to water damage, insulation issues, and structural issues, our team of experts has the knowledge and experience to keep your home safe and comfortable. Contact us now to schedule your consultation and take the first step towards a healthier, more efficient crawl space.