Exterior Vs. Interior Waterproofing: 3 Key Differences

Waterproofing techniques typically fall into one of two categories: exterior or interior. While each of these techniques is designed to control moisture in your basement, they don't go about the drainage process the same. To ensure you make the appropriate decision for your home, you need to have a clear understanding of how exterior and interior waterproofing methods differ.


Exterior and interior waterproofing systems are designed to control water issues in your basement. However, an exterior waterproofing system is designed to keep water out, while an interior system is designed to mitigate water that enters into your basement, with the aid of a sump pump. 

If your home is at the base of a slope or you are in a high flood risk area, you want to invest in an exterior waterproofing system. Sump pumps are helpful, but they do not always work well with large amounts of water. On the other hand, if you've taken measures outside your home to keep as much water as possible away, an interior system can work well. 


A critical distinction between these two waterproofing techniques is the installation process. If you're looking for a quick way to determine which option might best suit your situation, focus your attention on the space and layout of your property. 

For an exterior waterproofing option, you need to have enough space around the exterior of your home to support the excavation process. There also has to be ample clearance between your home and the placement of any utility lines that run through your property. If either of these issues presents a barrier for you, an interior solution is best. 


When it comes to the differences in price for exterior and interior waterproofing systems, you have to consider both installation and upkeep. When it comes to exterior systems, you can generally expect to pay more, as the initial installation and all repairs typically require some excavation of the land, which is more tedious and time-consuming. 

On the other hand, installing and servicing a sump pump or reapplying a water barrier on the basement walls is typically an easier task. However, when you start to weigh the costs that are associated with excess water in your basement, the benefits to install an exterior system often outweigh its cost. 

Even with extra knowledge on the topic, your choice of waterproofing techniques is a matter you should get some professional input on. Speak with a waterproofing service, like Sohan and Sons, about your concerns and needs so that you can get the information you need to make a good decision.