How does the porosity of limestone compare to granite for outdoor use?

When selecting natural stone for outdoor applications, porosity is a critical factor affecting durability and maintenance. Limestone is a sedimentary rock with higher porosity compared to granite, making it more susceptible to water absorption and weathering over time. Granite, an igneous rock, has a denser structure with lower porosity, resulting in better resistance to moisture, stains, and freeze-thaw cycles.

For outdoor use, granite is often preferred in high-traffic or wet environments due to its low porosity and long-lasting durability. Limestone, while elegant, requires regular sealing to minimize water penetration and prevent erosion. Both stones have unique aesthetic qualities, but granite generally outperforms limestone in harsh outdoor conditions. Proper installation and maintenance can extend the lifespan of either material, but granite remains the more resilient choice for long-term outdoor projects.