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Dos and Don’ts for Perfect Basement Wall Waterproofing

Posted on March 19, 2025

Estimated Reading Time : 5 Min.

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Basement Wall Waterproofing

Basements are, by nature, below ground. As a result, there is a constant risk of moisture buildup, making them vulnerable to water damage. This puts your entire home at risk as water can get into plumbing and electrical systems. 

This is where basement wall waterproofing comes in.  Water intrusion through basement walls can lead to mold growth, structural damage, and expensive repairs. As a premier basement waterproofing company, we’ve seen it all — from minor moisture issues to full-blown flooding disasters. The key to effective basement waterproofing is doing it right the first time.

If you’re a homeowner looking to waterproof your basement walls, here are the essential dos and don’ts to ensure long-lasting protection.

The Dos of Basement Wall Waterproofing

Basement wall waterproofing

When you are considering basement wall waterproofing, keep the following things in mind: 

Identify the Source of Moisture

Before applying any waterproofing solutions, identify where the moisture is coming from. Check for foundation cracks, poor drainage, condensation, or plumbing leaks. Understanding the root cause ensures that your waterproofing efforts are effective.

Use a Professional Waterproofing Solution

DIY waterproofing products may seem like an easy fix, but they often fail over time. Professional-grade sealants, drainage systems, and vapor barriers provide a long-lasting solution that truly protects your basement. Investing in expert services saves time and money in the long run.

Apply Waterproof Coatings and Sealants

High-quality waterproof coatings and sealants create a protective barrier against moisture. These should be applied correctly to interior and exterior walls for maximum effectiveness. Elastomeric sealants are especially effective because they expand and contract with the foundation.

Get a Professional Inspection

Even if your basement seems dry, a professional waterproofing inspection can reveal hidden moisture problems. Most waterproofing experts in Oklahoma use advanced tools like thermal imaging and moisture meters to detect potential leaks before they become major issues. Regular inspections also help you identify weaknesses in your foundation or existing waterproofing system, allowing you to address problems proactively rather than reactively.

Use a Vapor Barrier for Added Protection

A vapor barrier helps control humidity and condensation within your basement. Installing one along interior walls prevents excess moisture from seeping through and causing damage over time. If you have a finished basement, placing a vapor barrier behind the drywall or paneling can further protect against hidden moisture buildup. Additionally, pairing vapor barriers with a dehumidifier can enhance moisture control.

Pair Basement Wall Waterproofing with Other Strategies

Protecting your basement walls is only one part of a complete waterproofing strategy. There are other ways to keep your home dry and damage-free, including: 

Grade Your Landscape Away from the Foundation

The slope of your yard should direct water away from your home, not toward it. A slope of 6 inches every 10 feet is recommended to keep surface water from accumulating near the foundation. If your yard is improperly graded, water pooling can increase hydrostatic pressure on basement walls, leading to leaks and cracks. Adding soil or using landscaping solutions such as swales and retaining walls can help redirect water flow and reinforce drainage.

Ensure Proper Gutter and Downspout Placement

Water pooling around your home’s foundation can lead to basement leaks, which, if ignored, may result in serious structural damage. Keep gutters clean and functional by regularly removing debris and leaves that could cause blockages. Downspouts should drain water far from your foundation, generally at least 6 feet. For extra protection, consider installing downspout extenders to prevent water from accumulating near the basement walls.

Proper drainage around your home is one of the most effective ways to prevent water from seeping into your basement walls.

Install the Sump Pump

Along with waterproofing your basement walls, another thing you can do to improve drainage is to install a sump pump. The sump pump is a device installed in the sump pit beneath your basement. It pumps water away from your foundation, preventing your basement from flooding, especially during heavy rains. 

The Don’ts of Basement Wall Waterproofing

Waterproofing your basement requires both time and money, so it is important to do it right. Here are some things to avoid:

Don’t Rely on Paint Alone

When it comes to waterproofing your basement walls, one solution you might think of is painting the walls with high-quality paint. This is a good start, but your job is far from done. 

Waterproofing paint may seem like a simple solution, but it’s not a long-term fix. Paint can temporarily block moisture, but it does not address underlying issues such as hydrostatic pressure or foundation cracks.

Don’t Neglect Exterior Waterproofing

Interior waterproofing alone is not enough. Exterior waterproofing, including drainage improvements, proper soil grading, and foundation sealants, provides a more comprehensive solution. Simply fixing issues inside the basement without addressing external factors allows water pressure to continue building against your foundation walls. A combination of both interior and exterior waterproofing is ideal for long-term protection. 

Don’t Use DIY Solutions for Major Issues

If you’re experiencing consistent moisture problems, DIY fixes won’t cut it. Temporary solutions like caulking, epoxy injections, or store-bought sealants may mask the problem but won’t stop water infiltration. In some cases, they may even worsen the situation by trapping moisture behind walls. Call a professional to assess and resolve the issue properly. Experts can provide solutions such as excavation, exterior waterproofing membranes, and professional-grade sealants that are designed to last.

Don’t Overlook Ventilation and Dehumidification

Even with excellent waterproofing, basements tend to be humid due to being below ground. Without proper ventilation and a dehumidifier, moisture levels can still rise, leading to mold growth, musty odors, and potential health risks. 

Ensure your basement has proper airflow by installing vents, using an exhaust fan, or running a dehumidifier to keep humidity levels below 50%. A well-ventilated basement reduces condensation and improves air quality, preventing future moisture issues.

Don’t Install Carpet Without Proper Moisture Control

Carpeting in basements can trap moisture and become a breeding ground for mold. If you plan to finish your basement, use moisture-resistant flooring materials like vinyl, tile, or engineered wood, along with a vapor barrier underneath. 

If you insist on using carpet, install a high-quality moisture barrier first and make sure that the carpet is mold-resistant. Otherwise, damp carpet padding can harbor mildew and allergens, compromising indoor air quality.

Don’t Wait Until It’s Too Late

Last but not least, do not wait until it’s too late. Since basements are below grade, people often overlook them because they are out of sight and out of mind. But once water starts creeping in, it’s a lot more expensive to fix. The best time to waterproof your basement is before problems arise. 

Musty odors, peeling paint, white chalky residue (efflorescence), and damp walls are all signs of basement moisture problems.

Waiting until you have a major leak can result in costly repairs and damage to your home. Preventative waterproofing is always the smarter investment.

Trust the Experts for Long-Lasting Basement Waterproofing

Basement waterproofing is a crucial investment in your home’s longevity and stability. By following these dos and don’ts, you can keep your basement dry and protected from water damage.

At A. Fricker Roofing and Waterproofing, we have decades of experience in waterproofing basement walls.

Our expert team specializes in comprehensive basement waterproofing solutions, tailored to your home’s needs. Whether you need crack repairs, drainage systems, or full waterproofing, we’ve got you covered. Contact us today at (918) 402-7167 to learn more!

Basement Wall Waterproofing