exterior basement waterproofing

Exterior Basement Waterproofing: A Comprehensive How-To Guide


Exterior basement waterproofing is crucial for homeowners 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 applying 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

exterior basement waterproofing by Waterproofing PD

  1. Inspection and Planning: Thoroughly inspect your basement and the surrounding area. Identify any existing issues, such as 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 dirt, debris, or old paint. This step ensures that the waterproofing materials adhere correctly.
  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 applied to the exterior walls. Depending on the situation, this could be a liquid membrane, sheet membrane, or a cementitious coating.
  6. Installing Drainage Solutions: A drainage system like a French drain or weeping tiles is essential alongside waterproofing. This helps to redirect water away from the foundation.
  7. Backfilling: The excavated soil is backfilled after the waterproofing and drainage systems are in place. 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 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. Following these steps can effectively protect your basement from water damage and ensure a dry, healthy living space.

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