Does Interior Basement Waterproofing Work?

When it comes to waterproofing your basement there are two approaches. Those approaches are (1) interior waterproofing and the (2) exterior methods. Interior waterproofing is a very effective method, particularly when you install a weeping tile.


That being said, exterior waterproofing is still the best foundation waterproofing option. This is because it stops water from penetrating the structure’s foundation walls, maintaining a dry and strong foundation wall.

Interior waterproofing is really more of a water or moisture control system. The interior system utilizes drainage as a way to control the water that makes its way into your basement. It does so by directing allowing water in and pushing it away via a sump pump.

Exterior waterproofing is the waterproofing from the outside of the home. It is when the soil/ earth surrounding your home is excavated until the bottom of the home’s footings are exposed. At that point, weeping tile and a drainage system are installed to stop water from pooling and/or seeping through your foundation.

Due to its installation process, Interior waterproofing is the cheaper alternative. The process does not require as much time, labour, materials and equipment, which keeps its cost down. That being said, Interior waterproofing does not protect the strength of your foundation. (exterior waterproofing protects foundation strength).

Due to the minimal space inbetween Toronto properties, some homes may not allow for a safe exterior waterproofing system. If there is minimal space inbetween neighbouring homes, poor access points, or other land issues the exterior waterproofing system may not be feasible. It this case the interior waterproofing system is required. The only way to find out which process is best for you and your home is by having your home inspected by a professional waterproofing company. The Nusite Contractors team works with homeowners to create the best plan of action. We consider industry safety standards and the homeowners budget, allowing us to provide top quality service.

Interior Waterproofing

This method collects the water that seeps through basement foundation cracks. The interior drainage system; made up of weeping tile, drains, pipes, basin, and a sump pump then collect the seeping water and redirect it outside of the home.


A sump pump can be programed to automatically start when the water in the basin or pit reaches a specific volume (this is the most economical way to maintain a sump pump). We also recommend installing a back-up battery to keep your sump pump functioning during power outages.


Another interior waterproofing system consists of vapour barriers made of foil or plastic sheets. These sheets are installed along the basement walls to help keep moisture out. Interior methods try to seal leaks and cracks to keep your basement dry. It can be an ideal temporary solution and is often the best choice when exterior excitation is not possible.


About Nusite


Nusite Contractors Ltd. has been proudly serving GTA homeowners for over 30 years! We are a family business and take pride in customer service and professional work. You can contact us here to schedule a free consultation and written estimate! We would be happy to help!

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