I keep hearing about elastomeric coatings for stucco homes. Is that worth the extra cost here in Vancouver, and how is it different from regular exterior paint?

Elastomeric coatings are absolutely worth considering for stucco homes in Metro Vancouver, where our heavy rainfall and temperature swings create the perfect conditions for hairline cracks in stucco to let moisture in. The fundamental difference is flexibility — elastomeric coatings can stretch up to 300 to 500 percent of their original size, meaning they bridge and seal hairline cracks as the stucco expands and contracts. Regular exterior paint, even premium acrylic, can only stretch about 10 to 20 percent before it cracks.

These coatings are applied much thicker than standard paint — typically 10 to 20 mils dry film thickness compared to 2 to 4 mils for regular paint. This creates a waterproof membrane over the stucco surface while still allowing moisture vapour to escape from the inside. That breathability is important in our climate because trapping moisture inside stucco walls leads to serious damage over time.

The trade-off is cost. Elastomeric coatings run roughly 30 to 50 percent more than a standard exterior paint job. For a typical 2,000-square-foot stucco home in Vancouver, expect to pay around $12,000 to $20,000 for a professional elastomeric application versus $8,000 to $14,000 for conventional paint. However, the coating typically lasts 10 to 15 years compared to 5 to 8 years for standard paint, so the long-term cost per year can actually be lower.

The prep work is also more involved — all existing cracks need to be routed and filled, and the surface must be completely clean and dry before application.

For your next step, have a painter inspect your stucco for any active cracking patterns, as these could indicate structural movement that even elastomeric coatings won't permanently solve.

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