exterior basement waterproofing: how-to guide

Exterior Basement Waterproofing: A Comprehensive How-To Guide


Exterior basement waterproofing is crucial for homeowners looking to protect their property from water damage and moisture-related issues. This guide provides an in-depth look at the steps involved in exterior waterproofing and practical advice to ensure the process is done effectively.

Understanding Exterior Waterproofing

Exterior waterproofing involves the application of waterproof materials to the outside walls of a basement to prevent water from entering. It’s a proactive approach that addresses water issues from the outside, preventing damage before it starts.

Step-by-Step Guide to Exterior Waterproofing

  1. Inspection and Planning: Begin with a thorough inspection of your basement and the surrounding area. Identify any existing issues like cracks or poor drainage.
  2. Excavation: The first physical step involves excavating the soil around your basement walls. This is done to expose the foundation walls fully.
  3. Cleaning the Walls: Once exposed, the walls are cleaned to remove any dirt, debris, or old paint. This step ensures that the waterproofing materials adhere properly.
  4. Repairing Cracks: Before waterproofing, repair any cracks or damage in the foundation walls. This can be done using hydraulic cement or other suitable materials.
  5. Applying the Waterproof Coating: A waterproof membrane or coating is then applied to the exterior walls. This could be a liquid membrane, sheet membrane, or a cementitious coating, depending on the situation.
  6. Installing Drainage Solutions: Alongside waterproofing, installing a drainage system like a French drain or weeping tiles is essential. This helps to redirect water away from the foundation.
  7. Backfilling: After the waterproofing and drainage systems are in place, the excavated soil is backfilled. It should be done carefully to avoid damaging the new systems.

Maintenance and Upkeep

Post-installation, regular maintenance is vital. Inspect the exterior waterproofing periodically and monitor the overall drainage around your property. Ensure that gutters and downspouts function correctly and that the soil around your foundation slopes away from the house.

Hiring a Professional

While some homeowners may tackle exterior waterproofing as a DIY project, hiring professionals is often advisable. They bring expertise, appropriate materials, and equipment to ensure the job is done right. Waterproofing PD is your go-to partner in Toronto and GTA for exterior waterproofing.


Exterior basement waterproofing is a significant investment in the health and longevity of your home. By following these steps, you can effectively protect your basement from water damage and ensure a dry, healthy living space.



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