How does stamped concrete hold up compared to exposed aggregate for a front walkway in Moncton where road salt and snowplow scraping are annual problems?

For a Moncton front walkway facing road salt and snowplow scraping, exposed aggregate will significantly outperform stamped concrete in durability and longevity. Exposed aggregate creates a naturally textured, slip-resistant surface that's inherently more resistant to surface damage, while stamped concrete relies on a smooth surface finish that's vulnerable to salt damage and mechanical wear.

Exposed aggregate's advantages stem from its construction method — after the concrete is placed and leveled, the surface cream is washed away to reveal the decorative aggregate (stones, pebbles, or recycled glass) embedded throughout the top inch of the slab. This creates a surface where the aggregate itself bears the brunt of foot traffic, salt exposure, and occasional scraping from snow shovels. Even if the cement paste between stones experiences some salt damage or surface wear, the aggregate remains intact and the walkway maintains its appearance and function. The textured surface also provides excellent traction in Moncton's icy conditions without requiring aggressive de-icing.

Stamped concrete's vulnerability lies in its smooth, molded surface that depends on surface treatments for both appearance and slip resistance. The stamping process creates a relatively smooth finish that's then often sealed with acrylic or urethane coatings to enhance the pattern and color. Road salt penetrates these surface treatments over time, and the repeated freeze-thaw cycles that Moncton experiences (150+ annually) cause the surface to gradually spall and scale. Once the surface layer is compromised, the stamped pattern becomes less defined and may require expensive resurfacing or complete replacement within 10-15 years. Snowplow scraping and aggressive snow removal can also chip or gouge the surface, creating permanent damage to the decorative pattern.

For Moncton's specific conditions, both options require air-entrained concrete (mandatory for exterior work in New Brunswick's freeze-thaw climate) and should be sealed every 2-3 years with a penetrating silane/siloxane sealer rather than a film-forming coating. However, exposed aggregate is more forgiving when maintenance is delayed — the aggregate surface remains functional even if the sealer wears off, while stamped concrete without proper sealing deteriorates rapidly under salt exposure.

Cost considerations favor exposed aggregate as well. Exposed aggregate typically runs $10-14 per square foot installed in the Moncton area, while stamped concrete ranges from $12-18 per square foot. More importantly, exposed aggregate's lower maintenance requirements and longer service life (25-30 years vs 15-20 for stamped) make it the better long-term investment for a high-traffic, salt-exposed application like a front walkway.

Professional installation is recommended for both options, as proper timing of the surface washing (for exposed aggregate) or stamping (for stamped concrete) requires experience and cannot be corrected if done incorrectly. The window for these finishing techniques is measured in minutes, not hours.

Need help finding a professional concrete contractor experienced with decorative finishes? New Brunswick Concrete can match you with local professionals who understand Maritime climate challenges and can recommend the best approach for your specific walkway project.