10 Big Mistakes Businesses Make When Trying to Waterproof Their Own Property

Water intrusion isn’t just a nuisance—it’s a direct threat to your business operations, your building’s structure, and your bottom line. While some business owners consider tackling waterproofing on their own to save costs, small errors can quickly escalate into major disruptions and expensive repairs.

Here are 10 common mistakes businesses make when attempting DIY waterproofing:

1. Overlooking the True Source of Water

Applying quick fixes without identifying whether water is entering through foundation cracks, poor drainage, or roofing issues only masks the problem.

2. Using Residential-Grade Materials

Commercial buildings face greater demands, and store-bought products often aren’t strong enough to withstand the pressure and scale of water intrusion.

3. Skipping Surface Preparation

Waterproofing systems only work when surfaces are properly cleaned, dried, and prepped. Rushed jobs fail faster.

4. Focusing Only on the Interior

Painting over basement or lower-level walls with “waterproof” coatings won’t stop outside water from entering. Exterior drainage and foundation work is often essential.

5. Ignoring Drainage Around the Property

Improper grading, clogged drains, or poorly designed gutters can direct water straight toward the foundation.

6. Underestimating Small Cracks

Even minor cracks in foundations or walls can expand and cause significant structural damage if left untreated.

7. Forgetting About Airflow and Ventilation

Trapped moisture leads to mold and mildew, creating health concerns for employees and customers.

8. Improper Application of Products

Uneven or incorrect application of membranes, coatings, or sealants weakens the system and reduces long-term protection.

9. Misjudging Hydrostatic Pressure

The pressure of groundwater against a commercial foundation can be immense—DIY materials simply can’t withstand it for long.

10. Delaying Professional Help

The longer water problems go unresolved, the greater the risk to your property, inventory, and daily operations. Waiting too long often results in higher costs.

Protect Your Business with Confidence

At Denver Waterproofing LLC, we understand the unique challenges commercial properties face. From warehouses to retail spaces, we provide lasting waterproofing solutions that keep your building safe, dry, and operational.

Don’t put your business at risk—book your free estimate today with Denver Waterproofing LLC and protect your property with professional expertise.