Waterproofing Your Basement Walls From The Inside

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    Waterproofing your basement walls from the inside is one of the most effective ways to keep water from entering your basement.

    Since your basement sits below ground level it is a common spot for water to naturally pool. Some basements leak more than others and will need a sump pump or french drain in addition to wall waterproofing.

    Without proper waterproofing and drainage, moisture can become trapped against your foundation walls which will cause major structural damage over time. Not only will waterproofing prevent further water damage and a wet basement, but it will also save you money on costly repairs for mold and mildew accumulation.

    Waterproofing basement walls from the inside is a very simple process that anyone can do with some basic tools and this guide. In this article, we explain why waterproofing basement walls from the inside is necessary and what materials you have to use.

    Effective Basement Wall Waterproofing

    In order for waterproofing basement walls from inside to be effective, it has to fulfill a few criteria:

    • The waterproofing solution needs to prevent water from penetrating through the wall.
    • Prevent mold growth inside walls
    • Can’t damage drywall or impact load-bearing walls

    Don’t let waterproofing methods like waterproof paint fool you, they will not work long term.

    The waterproof solution needs to be non-toxic and safe for pets and children if living in your home. So that means no harsh chemicals or primers with formaldehyde, solvents or silicone. These can all damage your health and the environment.

    You also don’t want waterproofing methods that will impact your home’s structural integrity. If you damage the load-bearing walls in your basement, it could cause a collapse which will create even more problems than before waterproofing was done.

    How To Waterproof Basement Walls From The Inside

    Use waterproofing primer: Using waterproofing primer the wall from the interior by creating a waterproof barrier between your foundation and any porous materials like drywall or concrete. The waterproof primer coats both sides of the wall to create a waterproof seal. You won’t have to worry about mold or mildew growth on the walls again!

    Use waterproofing paint: This waterproofing solution is similar to painting your wall with primer. Except waterproof paints use waterproof additives and special waterproof resins to make a chemical bond between the paint and wall. The waterproofing additive creates a waterproof membrane that prevents water from penetrating through the wall. Some products like Flood Coat can be painted directly onto

    Seal holes and cracks: Just like waterproofing basement walls from inside, sealing your foundation’s holes and crevices will help prevent water from penetrating through the cracks. A good waterproof sealer can create a waterproof membrane that lasts for years.

    Add additional drainage inside and outside: If your basement receives lots of water, adding drainage can help get rid of that water. Installing waterproofing inside your basement will only go so far. Drainage systems work best when installed together to prevent future problems like mold growing inside your walls and foundation caving in over time.

    We recommend installing a sump pump in your basement and gutters on your roof to help prevent water from draining into your basement. You can also attach waterproof fabric or white waterproof pond liner near the foundation walls to direct water away from the home.

    Why Waterproof Basement Walls?

    You should waterproof your basement walls because, as we mentioned above, waterproofing basement walls from inside is the most effective way to keep water out of your home. The average cost for waterproofing a single basement wall starts at $300 and can be done by yourself with little hassle.

    If not waterproofed properly, rain water pooling around the foundation of your house will cause major damage. Mold and water damage can both cause thousands of dollars worth of damage so it is best to waterproof basement walls as soon as possible.

    Moisture that gets into the insulation of your house can degrade it over time which will create more work for you down the road. A waterproofing solution prevents this, prolonging the life of your insulation.

    Here are some signs that waterproofing needs to be done:

    • Water leaking through cracks in the walls
    • Mold growth inside walls
    • Water pooling at the base of the wall and in corners
    • Floor buckling in the basement

    Frequently Asked Questions

    Learn more about DIY basement wall waterproofing by checking out these frequently asked questions.

    Do waterproof paints work?

    No waterproof paint will not effectively waterproof your walls because it will be penetrated by water within a few months. Waterproof primer is better but they both have the downside of being toxic, so you should try to use something else that won’t damage your health or the drywall.

    Can a basement wall be waterproofed from the inside?

    Basement walls can be waterproofed from the inside by waterproofing methods like waterproof paint and waterproof foam. Although both products will waterproof your basement walls from the inside, they will not last as long as exterior waterproofing methods.

    What is the best product to waterproof basement walls?

    The best product to waterproof your basement walls is Liquid Rubber Concrete Foundation. It is very effective and affordable for any homeowner.

    Is it better to waterproof a basement from inside or outside?

    Waterproofing basement walls from the inside is much more effective than waterproofing them from outside. This is because finished basements will also act as waterproofing for your home, but waterproofing our exterior foundation wall still serves a purpose.

    How much does waterproofing basement walls cost?

    The price of waterproofing basement walls can vary depending on the method used. Although waterproofing paint is cheap, it will not last very long. A waterproof foam can easily last 20 years and waterproof sheetrock is the most long lasting option of waterproofing basement walls.

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