Basement Waterproofing Wars: Interior vs. Exterior – Choose Your Side!

In the ongoing battle against basement water intrusion, homeowners face a crucial decision: should they fortify their defenses from the inside or the outside? It’s a showdown of epic proportions – the Basement Waterproofing Wars! In this blog, we’ll delve into the intricacies of interior and exterior basement waterproofing methods, helping you make an informed choice and ensure your basement stays dry, no matter the weather.

The Interior Contenders

Interior Waterproofing methods are like covert agents working behind enemy lines, intercepting water before it breaches your basement. Here are some strategies from the interior camp:

  • French Drains: Think of them as moats around your castle. French drains intercept water and redirect it away from your basement. They work wonders in mitigating hydrostatic pressure.
  • Sump Pumps: Your loyal sentinels, sump pumps, are always on guard. When water levels rise, they activate and pump water away from your basement, preventing flooding.
  • Interior Sealants: A touch of camouflage – interior sealants like epoxy coatings and waterproof paints provide an additional layer of protection by sealing cracks and gaps in the foundation.
  • Crawl Space Encapsulation: If your basement has a crawl space, encapsulation acts as a force field, sealing out moisture and preventing mold and mildew growth.

The Exterior Brigade

On the other side of the battlefield, we have the **Exterior Waterproofing** warriors, who take a proactive approach to repelling water. Their strategies involve fortifying your home’s defenses from the outside:

  • Exterior Waterproof Membranes: These are like impenetrable armor for your foundation walls. Waterproof membranes are applied to the exterior, creating a barrier that keeps water at bay.
  • Drainage Systems: Exterior drainage systems, such as French drains installed outside the foundation, help divert water away from your home.
  • Exterior Excavation: Sometimes, it’s necessary to go on the offensive. Exterior excavation involves digging around your foundation to apply waterproof coatings, fix cracks, and install drainage systems.
  • Damp-Proofing: While not as robust as full waterproofing, damp-proofing treatments can help prevent moisture penetration through foundation walls.

The Decision-Making Process

Now that you’ve been introduced to the two opposing forces in the Basement Waterproofing Wars, how do you choose your side? Here are some factors to consider:

  • Existing Issues: If your basement is already experiencing water problems, interior waterproofing methods may provide a quicker and cost-effective solution.
  • Proactive vs. Reactive: Exterior waterproofing is a proactive approach to prevent water intrusion, while interior methods are often reactive solutions.
  • Budget: Exterior waterproofing can be more expensive due to excavation and labor costs, while interior solutions are generally more budget-friendly.
  • Landscape: The layout of your property and the presence of obstructions like trees or structures may influence your choice.
  • Professional Advice: Consulting with a basement waterproofing expert can help you assess your unique situation and determine the most effective strategy.


The Basement Waterproofing Wars have no clear winner; the right choice depends on your specific circumstances. Whether you decide to reinforce your defenses from the inside or launch a preemptive strike from the outside, the goal remains the same: a dry and protected basement.

Remember, in this battle, knowledge is your greatest ally. Understanding the strengths and weaknesses of interior and exterior waterproofing methods equips you to make an informed decision and secure your basement against the forces of nature. So, choose your side wisely and let the Basement Waterproofing Wars begin!