Water in Crawl Space

Water in Crawl Space

Your crawl space is especially susceptible to water damage, which causes other damage to your home. Bay Crawl Space and Foundation Repair is a crawl space company with expert contractors that specialize in crawl space repair, ensuring your home and foundation are sound and steady.

What Causes Water in Crawl Spaces?

Multiple factors that can lead to water in crawl spaces. Knowing the cause of your excess crawl space moisture can help you determine the best solution. Some of the most common reasons include:

  • Improper landscape grading: Leads to water draining into your home.
  • Downspouts and gutters that are damaged or installed incorrectly: Directs water towards your basement or crawlspace.
  • Broken water lines: Can cause water to leak into your crawl space.
  • Uncovered soil: Causes moisture to seep up from the ground and into your home.

How do I Prevent Excess Water in my Crawl Space?

If your crawl space is susceptible to excess moisture due to issues like foundation grading or damaged gutters, it’s best to solve the problem at its source. However, if you’re confident that the water seeping into your home isn’t due to damage or poor construction, the next step in preventing water in crawl spaces is installing a vapor barrier. At Bay Crawl Space and Foundation Repair, we offer 6-mil Vapor Barrier installation to our customers who are looking for the best solution for preventing water damage.

What Do I Do if Water Has Already Collected in My Crawl Space?

Crawl space repair may be necessary for homes that frequently have standing water in crawl spaces and flooding which can cause significant problems by allowing foundation settlement, moisture damage in the crawl space, and ruined vapor barriers. Crawl space repair starts with an expert contractor from Bay Crawl Space and Foundation Repair determining the kind of repairs your crawl space needs, such as a drainage system, and which system works best for your home to get rid of crawl space water. Once your crawl space is rid of water, your foundation is better protected, and future moisture damage is prevented. As a crawl space company, Bay Crawl Space and Foundation Repair is committed to providing quality, expert crawl space repair services, saving your foundation and the belongings in your home from possible or further damage.

Removing Crawl Space Water and Water Management


French Drains, aka draintile, is the means of allowing water to be directed where the system designer wishes. It should allow water into the inners of the piping but not allow debris and sand to enter the piping. A well-installed system will not be visible but will be covered up with drainage stone to prevent clogging and allow the easy egress of water.

The appropriate depth, shape, and how extensive the system is should be decided by an experienced crawl space technician. A closed-loop system is most effective and more is typically better. Installation is very hard and labor intensive so a proper system design is important to prevent cost gouging.

This system should allow the removal of water for a lifetime from your crawl space! Our systems come with a long-term no-clog guarantee!


Improper installation is common here and can cause failure of the system… Crawl space drainage is a rugged application and should be strong enough to withstand the conditions.

The sump pump itself will be sitting in a constant pit of water and will often have to pump very large volumes during a good downpour. The less moving parts, the better! We only use the best pumps with low failure rates, high power, and reputable warranty service.

The sump pump basin MUST allow water to the pump while PROTECTING the pump itself from debris. The best sump pump basins will have small holes drilled, be very strong, and allow direct penetration from the drainage pipes. Let us help you manage your ground water!


Once the water makes it’s way into the sump pump basin, it is pumped out with a sump pump. A crawl space sump pump should be activated by the presence of water. Our pumps utilize vertical float switches so once the water level reaches a certain point, the water is discharged outside the crawl space.

As long as the sump pump has power, the water level should not rise high enough to show signs of flooding in the crawl space. These pumps are made powerful enough to discharge over 2,000 gallons per hour. Also, the impeller permits the passage of solids without clogging.

Some pumps require you to be present, plug in, and unplug the pump to turn it on and off. They are not suited for a crawl space water management system and should run automatic.


When power is lost in a home, the power to most sump pumps is lost. For that reason, battery-backups are recommended with crawl space water management systems that seek to keep the crawl space dry, “all the time”.

With a battery back-up sump pump system, the back-up pump activates in the event of a power loss. It is powered by a 12V deep cycle battery external to the sump pump system, typically near the pump. It should be inside of a purpose built battery container and sat on top of a wooden or concrete block.

The backup pump in the system we install can pump a healthy 2,300 GPH at a 10 foot head which rivals many standard 1/3HP 120V operated primary or main sump pumps.

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