Can I use regular paint on basement walls or do I need special basement paint?

You can use regular paint on basement walls in most cases, but moisture-resistant paints are often the better choice for Ottawa's climate conditions. The key is understanding your basement's moisture levels and choosing the right paint type accordingly.

Regular latex paint works fine on properly prepared drywall in dry basements, but Ottawa's freeze-thaw cycles and high groundwater levels in many areas can create moisture challenges. If your basement stays consistently dry year-round and has proper vapor barriers, standard interior latex paint is perfectly acceptable and much more affordable.

However, moisture-resistant paints offer better protection against Ottawa's common basement issues. These include elastomeric paints, which can bridge small cracks, and paints with mold/mildew inhibitors. Basement-specific paints typically cost $10-20 more per gallon but provide better durability in humid conditions. They're especially important if you're finishing a basement for a secondary suite, where moisture control affects both comfort and building code compliance.

Concrete block or poured concrete walls require different considerations. Never use regular paint directly on bare concrete - it will peel within months. You'll need a concrete primer first, or better yet, a masonry paint designed for alkaline surfaces. In Ottawa's clay soil conditions, concrete walls often experience minor moisture intrusion, making specialized concrete paints worth the investment.

Preparation is more critical than paint choice. Clean the walls thoroughly, address any moisture sources, and ensure proper ventilation. If you see any white chalky residue (efflorescence), that indicates moisture issues that paint alone won't solve. Ottawa basements built before 1980 often lack proper exterior waterproofing, so addressing the root cause prevents paint failure.

Professional guidance is recommended if you notice any dampness, musty odors, or previous water damage. For secondary dwelling units, proper moisture control isn't just about paint - it's required for building code compliance and tenant comfort.

Next steps: Test your basement's humidity with a simple gauge for a few weeks first. If it consistently stays below 50% humidity, regular paint works fine. Above that, invest in moisture-resistant options. For a free assessment of your basement's condition and paint recommendations specific to your space, contact Ottawa Basements - we see how different paint choices perform in Ottawa's unique conditions daily.