Common Repairs for Crawlspaces: A Guide

Posted on: 3 October 2023

Crawlspaces are a part of your home that can be overlooked often, but they play a crucial role in the structural integrity and overall health of your house. When left unchecked, crawlspaces can give rise to a host of issues that can be expensive to repair and hazardous to health. Fortunately, most common crawlspace problems can be fixed relatively easily, provided they are identified and addressed in time. Here are some of the most common repairs you may need for your crawlspace and what you can do to prevent them.

Moisture Control

Moisture in the crawlspace can cause a range of problems, including mold, mildew, and rot. The best way to deal with moisture is to control it. You can do this by encapsulating the crawlspace, which involves lining it with a moisture barrier. The barrier can be made from various materials such as polyethylene, reinforced foil, or vinyl. It should be tightly sealed to the foundation walls and floor, with the seams overlapping and taped. Additionally, you may install a dehumidifier to keep the air dry and lessen the moisture in the crawlspace.


Insulation is vital for maintaining the temperature of your home, particularly during extreme weather conditions. Uninsulated crawlspaces can allow air to seep in and out, making your living space uncomfortable. Insulate your crawlspace with batt or foam insulation to reduce heat loss and thus your energy bills. However, be careful not to over-insulate since excess insulation can trap moisture and cause more problems.

Pest Control

Pests like rodents, spiders, and termites are common in crawlspaces, and an infestation can lead to significant damage if left unchecked. To prevent this, seal all holes and gaps in the crawlspace's exterior to prevent pests from entering. You may use steel wool or caulk to seal openings. Additionally, install screens over vents to deter insects and rodents. An inspection by a professional pest control company can also help identify and eliminate any infestations.

Structural Repairs

Sometimes, the beams and joists that support the home's weight may deteriorate, weaken or disintegrate. The damage may be caused by excess moisture or pests feeding on the wood. When that happens, your home's foundation may fail, leading to costly repairs or replacement. You may need to replace the damaged parts entirely or reinforce them with sister joists or steel beams. Since crawlspaces are tight and often difficult to access, it's best to hire a professional contractor to do the repairs.

Water Damage Repairs

During heavy rains, water can enter the crawlspace and cause damage. A flooded crawlspace can cause foundational issues, such as soil shifting, buckling, or cracking. The damage may also be reflected in the interior or exterior of the house, such as wall cracks or uneven flooring. If you notice signs of water damage in the crawlspace, such as pooling water or dampness, call in a professional to pump out the water, dry the crawlspace, and repair any structural damage. 

For more info about crawlspace services, contact a local company.