What to Check in a Crawl Space
A crawl space can reveal important conditions and potentially costly repairs in a home. Review it preliminarily for red flags before submitting a contract, and have a licensed inspector examine it once the home is under contract.
Key takeaways
- A crawl space is different from a basement and a concrete slab, and it can contain some of the most costly repairs in a home.
- Check plumbing, water lines, electrical wiring, the air conditioner, insulation, vapor barrier, pillars, wood, and surrounding walls.
- Look for water, moisture, poor drainage or terrain slope, insects such as termites, animals, damaged wood, and fallen or incomplete insulation.
- The example includes PVC plumbing in apparently good condition, block pillars without visible cracks, a vapor barrier, and an air-conditioning unit changed in 2026.
- Review the crawl space preliminarily for red flags before submitting a contract, and have a licensed inspector examine it once the home is under contract.
Explanation
A crawl space is the area beneath a home built on pillars and wood, unlike a basement or a concrete slab. The space may show the condition of plumbing, water lines, vapor barrier, pillars, surrounding walls, terrain slope, wood, insulation, electrical wiring, air conditioning, and signs of water, moisture, insects, or animals. Some crawl space issues can lead to costly repairs. In the example, condensation from the air conditioner was dripping and could cause moisture, which can attract termites and create other damage. A preliminary review can help identify major problems before submitting a contract, followed by an examination by a licensed inspector after the home is under contract.
Reel transcript
English version
The crawl space is a space beneath houses when they are built on pillars and rest on wood, different from a basement and different from a concrete slab. For me, it is one of the most important parts of the house to inspect. Why? Because the most costly repairs may be here. The plumbing can be seen here. In this case, it appears to be PVC plumbing. It is the plumbing currently used, and this one appears to be in good condition. In houses from 1970 or older, you often find cast iron. Those may have some deficiency that needs to be checked. This house, for example, has a water well, and over there it has its filter that brings the water from the well. It does not have any water-softening system. It has a vapor barrier, which is this plastic, the vapor barrier, which keeps moisture from rising. We check that the pillars are in good condition. All these block pillars appear to be well-settled; they do not have cracks. We look at the surrounding walls. Sometimes you can see moisture. It is very important to look at the slope of the terrain. This terrain, for example, slopes from over there toward here. No moisture is visible over there, which is good. Look for little animals. If there happen to be insects that destroy wood, such as termites, it is very important to check that there are none. Look at the condition of the wood. Also make sure there are no animals, that it does not look deteriorated, and that it does not look cracked. Look at the insulation, which is this layer of protection against heat and cold, and make sure it is complete and has not fallen. Look at the electrical wiring. In this case, for example, it looks good. Look at the water lines, which are these. Sometimes you find copper ones if the house is from 1970 or around that time. Look at the air conditioner. In this case, the unit was replaced in 2026, and it looks very good. Check that it does not smell damp. Make sure there is no water. In short, there are several elements that should be checked in the crawl space, and it is one of the most important parts of the house. Over there, for example, I identify that water from the air conditioner's condensation is dripping a little, and that can bring moisture. Moisture attracts termites and causes other damage. A licensed inspector is the recommended person to come and inspect the selected house once the house is under contract. But before submitting a contract, you want to review this preliminarily and make sure there are no red flags or major problems in the house.
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