DIY Crawlspace Waterproofing Tips

Start the waterproofing process with a thorough crawlspace examination and ensure the home is graded correctly.

Crawlspaces are dark and damp, making them susceptible to pests and mold, compromising indoor air quality and impacting the home’s energy efficiency. Waterproofing is highly effective in protecting the crawlspace from potential threats. A clean and waterproofed crawlspace is essential to preserve property value, avoid hefty repairs, and ensure peace of mind.

Crawlspace waterproofing involves creating a heavy-duty moisture barrier to prevent leaks and other issues and protect the home for many years. Waterproofing a crawlspace is relatively simple, and a person with the right tools and skills can complete the process quickly. Here is a comprehensive guide for DIY crawlspace waterproofing:

Examine the crawlspace

Start the waterproofing process with a thorough crawlspace examination and ensure the home is graded correctly. Check the crawlspace for pests, mold and mildew, grading, or drainage issues, and fix them before waterproofing. Also, inspect the appliances like water heater or HVAC equipment for leaks. Take adequate steps to resolve any issues that can create problems with the waterproofing process or reduce its effectiveness. 

Remove all debris

The next step is removing the old vapor barrier if the home has one. Remember to wear a face mask and proper protective gear during this process. Sweep away any debris and other obstacles, including rocks, nails, metal pieces, and leaves that can interfere with waterproofing. 

Perform necessary repairs

After cleaning and disinfecting the crawlspace, inspect the structural elements to ensure they are in perfect shape and repair any damages. Replace rotten wood, secure foundation holes, repair the entranceway door, check the subfloor for rotting, and ensure the rafters and joists are in place.

Seal all vents and openings

Take the necessary steps to seal any vents and gaps. It will prevent external air and moisture from entering the crawlspace and help keep it dry. 

Install the new moisture barrier

Level the ground to ease the installation process. Installing the new vapor barrier immediately after removing the old one will prevent moisture from entering the crawlspace. Always purchase a thick barrier for durability and better insulation. Roll out the vapor barrier and cut the wrap after reaching the far end. Secure the barrier to the ground properly and ensure it is as flat as possible. Before starting with the new line, overlap the new and existing line by a few inches. Tape the seams of the lines to create a seamless barrier and limit moisture and humidity. Fasten the moisture barrier to the foundation and place moisture-proof insulation on the exposed parts. 

Install a dehumidifier

Dehumidifiers are perfect to keep the moisture levels low in the crawlspace. Experts recommend installing a dehumidifier in the crawlspace after waterproofing to keep the space completely dry.

Depending on the crawlspace size, the waterproofing process can take one to three days. 

Benefits of waterproofing the crawlspace

Homeowners can enjoy a range of benefits by waterproofing the crawlspace, including:

  • Improved air quality

  • Better energy efficiency

  • Maintain the property’s structural integrity

  • No mold and mildew

  • Minimize pest infestation

  • A clean and useful storage space

Keep the crawlspace dry

Homeowners thinking about waterproofing their crawlspace can follow the above steps. Alternatively, they can hire a local crawlspace waterproofing professional to avoid the mess and ensure a quality job.

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