Crawl Space Waterproofing: Everything You Need To Know

A crawl space waterproofing system is essential if your crawl space is wet and flooding. You may prevent more harm and pricey expenses and restore your health and home by taking the appropriate precautions. 

Therefore, we have created this article to help you learn more about the benefits of crawl space waterproofing and the installation process. So let’s start!

What is crawl space waterproofing?

Crawl space waterproofing, also known as encapsulation, is the process of entirely waterproofing crawl spaces. This indicates that all penetrations have been sealed, ensuring no leaks occur even if a pipe breaks. The floor will also be prepared to withstand moisture, keeping your home dry and safe!


Cost of crawl space waterproofing: Factor

The average cost of crawl space waterproofing varies greatly and is determined by the following factors:


Crawl space’s dimensions

The crawl space waterproofing cost varies based on your home size. If there are more penetrations, such as vents or windows, the price may rise! The component required for the encapsulation process is another issue that could affect the cost of your crawl space waterproofing.

How much does crawl space waterproofing cost?

The cost of waterproofing your basement or crawl space varies based on the work required by the contractor. There are additional expenses for each service that the contractor provides.

Other considerations can also influence the cost of waterproofing your crawl area. The concerns may include the location of your home, the services provided by the contractor, and the fees charged for those services.

A minor foundation repair may cost $2,000, but more significant repairs may cost $10,000. A sump pump can cost up to $1,000. If there is no sump pump basin, the project may cost $8,000. If drain tile installation is required, the project may cost $15,000.

Encapsulation, or placing a vapor barrier over the exterior of your basement, is a superior alternative. Basement encapsulation can cost between $2,000 and $15,000.

On average, homeowners pay between $4,000 and $8,000 to have their basements enclosed. Encapsulation for crawl areas can range between $2,000 and $10,000.

You now know there is no mold and no need to be concerned about gas back drafting into your home.The encapsulation procedure can begin once the contractor confirms that your basement or crawl space is free of all dangers.

Crawl Space Waterproofing

Crawl space waterproofing is an excellent solution for homeowners who want their properties to be safe from moisture and water damage. It is essential in protecting one’s home from potential health risks and costly repairs. 

There are many benefits to crawl space waterproofing, and here are some of the main pros: 

  • Keep home warmer in the winter and colder in the summer If your crawl space is humid, so will your home. In the winter, humidity makes your home feel colder; in the summer, it feels warmer. Turning up the heat or air conditioning costs more money in terms of energy. Crawl space waterproofing with a dehumidifier keeps the crawl area dry, which means the air coming into your home due to the stack effect is also dry.
  • Your home’s air will be cleaner Because of the stack effect, if the air in your crawl area is full of mold, mildew, and other allergies, the air in your home will be as well. Anyone living in the house could develop respiratory difficulties due to this. Because properly waterproofed crawl spaces are clean, dry, and mold-free, the air quality within your home improves.
  • Maintain the structural integrity of your home Damp crawl areas increase wood rot and attract wood-eating pests such as termites. The floor above will eventually be jeopardized as wood rot and rodents work on the beams and joists in your crawl space, resulting in costly crawl space repair. Crawl area waterproofing and encapsulation will prevent wood decay, keep pests away, and preserve the structural integrity of your home.
  • Extra storage space A clean, dry-encased crawl space is perfect for storing. The electrical wiring in your home is kept dry by crawl space waterproofing. Moisture near electrical wiring may result in short circuits and raise fire danger.
  • None found so far

Crawl space waterproofing: Warning signs

Crawl space waterproofing is important for home maintenance and protection, but it can be difficult to know when a crawl space needs waterproofing. It’s essential to recognize the warning signs and take action to prevent costly repairs down the road.

  • Above the crawl area is a sagging or bouncy floor.
  • When you walk by, the furniture shakes.
  • Issues with opening and closing windows and doors
  • A musty-smelling residence
  • Mold is seen in the crawl space.
  • Water accumulated in the crawl space
  • Pests found in the crawl space
  • Crawl space wall efflorescence

If you detect these warning signs, you must act quickly. Waterproofing in crawl spaces should not overlook. Crawl space waterproofing can help keep your house secure and dry.

What Components Comprise Crawl Space Waterproofing?

Crawl space waterproofing involves numerous components. As previously said, the size of your crawl space and other considerations, such as penetrations, will significantly impact the project’s cost. A typical crawl space waterproofing job will include the following components:




It is vital to close the vents in your crawl area when it comes to ventilation. This will keep moisture and humidity out of your space while keeping the heat in. As a result, your crawl space will be dry and cozy all year!


Dehumidifier prices

A dehumidifier can be an essential part of crawl space waterproofing. This will assist in removing extra moisture from the air, ensuring the humidity level in the crawl area is ideal. This is especially significant if you live in a humid environment.


Costs of crawl space repair

If there are any issues in your crawl space, such as cracks, the cost of crawl space waterproofing will rise. Before the contractor can begin waterproofing work, these issues must be resolved. The price will vary based on the severity of the crawl space repair required.


Insulation and barrier defense

Polyethylene vapor barriers must be built to prevent water from seeping into your crawl area. Various thicknesses are available, and the amount of layers utilized is determined by the size of your crawl space, resulting in a tailored fit that easily adheres to surfaces. 

This vapor barrier provides the appropriate insulation while preventing allergens and humidity from entering your home.


Having stated that vapor barriers have excellent insulating qualities. This is connected to the 4-layer reinforced construction. Its outside layer is a high-strength, low-density polyethylene film, while its interior layers regulate heat and humidity with ultraviolet and thermal stabilizers.


Drainage system

A drainage system keeps water from accumulating in your crawl area. This will help to ensure that moisture does not cause problems with your home’s foundation. Sump pumps may be utilized to help evacuate the water.

How To Waterproof a Crawl Space?

Knowing the appropriate guidelines to follow is required to complete the proper tasks. We have provided the following instructions to make your work easier:


Set up a drain tile system 

The first step is to put in a drain tile system. A drain tile system is the gold standard for waterproofing a crawl space or basement. A drain tile system, as opposed to just putting up a barrier to keep water out, prevents moisture from building up in the soil surrounding the foundation. Any standing water in the soil is directed to a sump pit and expelled away from the foundation by a sump pump.


Encapsulate the crawl space 

The next step is to apply a thick vapor barrier to the ground and the crawl space walls. This isolates the crawl space from the dirt floor and keeps moisture out of the crawl space’s wooden components.


Install a dehumidifier 


The final step is to install a dehumidifier. This ensures that the crawl space remains as dry as possible. A waterproofed and encapsulated crawl area with a dehumidifier can be employed for storage.

By taking the time to waterproof your crawl space, you can help to protect your home from water damage and ensure that your home remains safe and dry.

Maintenance preventative

Encapsulation isn’t the end of basement or crawl space care. The floor, walls, and vents must all be fully sealed. The idea here is to make an envelope that will protect your home from the elements.

A plastic vapor barrier affixed to the base, walls, piers, and mechanical equipment will suffice. It will keep moisture out of your crawl space and away from your vital mechanical equipment.

In addition to adding a barrier to the walls and piers, your contractor should safeguard your air handler and water heater. The same goes for any vents or openings that lead outside.


The vapor barrier helps keep damp outdoor air out of your basement or crawl room. A contractor can cover crawl space vents with foam board and spray foam insulation. The contractor will then install foam insulation on the crawl area walls. 

Finally, they will use spray foam to air seal all cracks and gaps, including AC drain lines and band joints, as well as plumbing and electrical wiring openings.

Wrapping up

Your home’s crawl space is an essential aspect of its foundation, and a damaged one endangers the structural integrity of your home and your family’s health. A damp, cold crawl room is also a contributing factor to high energy expenditures.

Crawl space waterproofing is the perfect solution if you have crawl space water issues. Applying a thick sheet of plastic to the ground and walls is all that is required for crawl space foundations. This will help to keep groundwater out of the crawl space. Drylok can also be used to protect crawl space walls from water damage.

Thereby, we have covered everything that a homeowner should be aware of. So consider all the important factors and maintain your house and health.

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Michael Bowen

Michael Bowen

Michael Bowen is an ambitious entrepreneur who has been in the business of building homes since he was 19. Michael's commitment to honesty, integrity, and high-quality workmanship has earned him a reputation as one of the best in the business.

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