how to renovate your basement: height increase & waterproofing

“Increase basement height and keep it waterproof for lasting comfort.”

For many Canadian homeowners, the basement feels like wasted space—too low, too damp, or too unfinished to use comfortably. Renovating your basement can turn it into a bright, livable area for family time, a home office, or even a rental suite. Two of the biggest steps in this process are increasing the ceiling height and making sure the basement stays dry.


Why Basement Height Matters

Older homes in Canada often have low basement ceilings, sometimes under 6 feet. That makes the space feel cramped and limits how you can use it. Raising the height gives you:

  • More comfort and headroom.

  • Flexibility for things like bedrooms, rec rooms, or gyms.

  • The chance to create a legal rental suite in many provinces.

Ways to Gain Basement Height

  1. Lowering the Floor (Underpinning)

    • Contractors dig down and create new, deeper footings under your foundation.

    • It’s the most effective method but also the most involved and expensive.

  2. Bench Footings

    • Instead of lowering the whole basement, they dig around the edges.

    • You get more height in the middle, but lose a bit of floor space near the walls.

  3. New Slab

    • If you only need a few extra inches, replacing the concrete floor may be enough.


Why Waterproofing Comes First

Canadian basements deal with heavy rain, snowmelt, and high water tables. Without proper waterproofing, you can face leaks, mold, and damage. Before finishing your basement, take care of the water.

Waterproofing Tips for Homeowners

  • Check the outside: Keep gutters clean, extend downspouts, and slope soil away from the house.

  • Exterior waterproofing: Dig around the foundation, seal cracks, and add drainage pipes.

  • Interior waterproofing: Install a sump pump and wall membrane to control water from the inside.

  • Use proper insulation: Rigid foam and vapour barriers prevent moisture buildup.


The Payoff for Homeowners

Combining more height with waterproofing turns your basement into a valuable part of your home. Benefits include:

  • Extra living space without building an addition.

  • Healthier air quality with less dampness and mold risk.

  • Higher property value—especially if you add a rental suite.


Final Thoughts

Renovating your basement can feel like a big project, but focusing on height and waterproofing first makes everything else possible. Once your space is taller and drier, you can design it however you like—whether that’s a cozy family den, a guest suite, or a modern income-generating apartment.

In 2025, with Canadian housing costs on the rise, a well-renovated basement is one of the smartest upgrades you can make.

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