How does marble compare to limestone in weathering resistance for outdoor use?

When selecting natural stone for outdoor applications, weathering resistance is a critical factor. Both marble and limestone are popular choices, but they differ significantly in durability.

Marble is a metamorphic rock known for its elegance, but it is more porous and susceptible to acid rain, pollution, and freeze-thaw cycles. Over time, marble may develop etching, discoloration, or surface erosion, requiring regular sealing for protection.

Limestone, a sedimentary rock, is generally denser and less porous than marble, offering better resistance to moisture absorption. However, it can still be affected by acidic conditions and may require maintenance in harsh climates.

For high-traffic or extreme weather areas, limestone often outperforms marble in long-term durability. However, marble remains a premium choice for decorative elements in milder environments. Proper sealing and maintenance can extend the lifespan of both stones.

Ultimately, the choice depends on climate, usage, and aesthetic preferences. Consulting a stone specialist can help determine the best option for your project.