What's the best approach for painting the concrete foundation walls that are visible on our split-level home in North Vancouver?

Painting exposed concrete foundation walls on a North Vancouver split-level requires careful preparation due to the heavy rainfall and moisture conditions on the North Shore. Concrete is porous and naturally wicks moisture from the ground, so the biggest challenge is ensuring the paint adheres properly and does not peel or blister from hydrostatic pressure pushing moisture through the wall. Start by cleaning the concrete thoroughly with a pressure washer to remove dirt, moss, and any efflorescence, which is that white powdery mineral deposit common on concrete in wet climates like ours. Any existing loose or peeling paint must be scraped and wire-brushed off completely. Patch cracks and holes with a hydraulic cement or concrete patching compound. Once the surface is clean and dry, apply a masonry primer designed for below-grade or moisture-prone concrete. For the topcoat, use an elastomeric masonry paint rather than standard exterior latex. Elastomeric coatings are thicker, more flexible, and better at bridging hairline cracks that develop as concrete shifts seasonally. They also provide superior waterproofing, which is essential given North Vancouver's annual rainfall that often exceeds 2,000 mm in higher elevation neighbourhoods. Choose a colour that complements your home's upper exterior but be aware that the portion of foundation below grade should not be painted at all, as it needs to breathe. As a next step, check whether your foundation has any active water seepage or drainage issues that need to be resolved before painting, since no paint will perform well over concrete that is constantly saturated.

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