When it comes to basement foundation waterproofing, you have a choice between exterior or interior waterproofing. Interior methods are often preferred due to their many benefits.
1. Less Intrusive
A big reason to choose interior waterproofing is that it is much less intrusive compared to exterior waterproofing. There is no need to excavate the basement foundation, destroying the landscaping in the process, just to apply a waterproof membrane. You will need to empty your basement before an interior application, but this is much easier than repairing the soil grade and landscaping.
2. Integrated Options
Interior waterproofing methods include more than a painted-on membrane on the inside walls and floor of the basement. Depending on the extent and source of the water, your contractor may recommend installing trenches that lead to a sump pit and a sump pump. The interior membrane coating will force water to drain into the trenches where the sump pump can take care of it. In some cases, you may only need the membrane, or a membrane and drain line installation.
Exterior options can be expensive since they require lots of time and big earth moving equipment before the membrane can even be installed. Interior options, even if trenching and pumps are required, tend to cost a lot less than an exterior job. Interior waterproofing can also typically be completed in less time, which means you won't be paying as much for labor, either. If you are on a budget, then interior waterproofing can be the best solution.
4. Targeted Prevention
Some parts of a basement foundation can be more prone to water leaks than others. For example, corners are common weak areas where water incursion occurs. Cracks in the basement wall can also be a problem spot. With interior waterproofing, there is no one-size-fits-all solution. Your contractor will take the time to further seal the areas where there is a higher chance of leaks or to fix existing damages before applying an all-over membrane coating.
5. Damage Mitigation
Water in the basement can cause a range of damages. Mold and mildew, which also lead to home air quality issues, can be completely avoided with good interior waterproofing. In a finished basement, waterproofing before finishing the space can prevent water damages to flooring and wallboards. Further, the waterproofing will stop moisture rot from causing structural damage to floor joists and studs.
Contact a waterproofing contractor to learn more about the interior waterproofing options that are available.