Alexandria Office: (703) 552-8201 | Vienna/McLean Area: (571) 260-5016

Residential Crawl Space Problem Signs

Crawl Space Water Problem

When you have a problem in your crawl space, it can go unnoticed for many years until it becomes very serious. The most typical problems we see in crawl spaces are excess water and flooding during heavy rains. This can cause a number of other issues that can present themselves over time. We will discuss some of the more common issues here.

Excess Water

During or after heavy rains, water can come into the crawl space through air vents, the door, or even up through the soil as a result of drainage problems. Because most crawl spaces have very little airflow and no sunlight enters, the water can stay for days or weeks. This causes excess humidity to be in the air which can weaken the structure, and cause any equipment there to not perform correctly or at all.

Mold and Mildew

Similar to issues prevalent in basements, with any cool, dark environment combined with excess humidity, mold has a chance to grow and thrive in a crawl space. This will reduce the quality of the air inside your home and can cause serious allergic reactions and other health issues for you and your family. Some mold can even be deadly which makes this one of the worst problems you can face.

Sagging Floors

Sagging Floor Joists

When the moisture is able to permeate the flooring for many years, it can cause the floor joists that support the first floor to become weaker and softer over time. This will cause your floors to become uneven and even sag in some places. If this continues for too long, the floor can become unable to support any weight and they could collapse. If this happens, the only repair is to completely rebuild the flooring structure.

Floor Joist Damage

Damaged floor joists often go unnoticed for years until a floor begins to sag, a pest control inspector observes the issue, or a home inspector flags the damage. Floor joists can be damaged for a variety of reasons. Home improvement contractors often unknowingly cut or drill through floor joists causing severe damage. Pests such as termites or long term water leaks can turn solid structural members to Swiss cheese if the root of the problem isn't remedied in a reasonable period of time.


Unsealed crawl spaces can be a safe haven for any type of pests, critters, and bugs that enter the area. If the area is unused and rarely visited, they could live there for many years.


If you see any of the problems we've described here in your crawl space, these can all be solved. Our team has worked with homeowners in our area to solve these problems. Please follow the link below to get more information about our crawl space repair solutions.

Repair Solutions

Customer Reviews

Average rating for Deska Foundation Repair & Basement Waterproofing is 5 stars of 5 stars - based on 8 reviews
Waterproofing in Alexandria, VA
We've used Deska several times and the past and they've always been great!
Janice M - Alexandria, VA 22312
Basement Waterproofing in Alexandria, VA
We were very pleased with Deska. Our foundation walls were cracked really badly. The engineer tested the walls and showed me that there was actually water coming through the walls at some areas and this was part of the problem. We ended up having the walls epoxy injected along with a drainage ...
John G - Alexandria, VA 22312
Foundation Repair in Alexandria, VA
I've used Deska several times over the years for foundation repair and waterproofing issues and they have always been very honest and helpful! Good contractors are hard to find and they are truly a professional company!
Maria C - Alexandria, VA 22312