How does the porosity of marble affect the longevity of outdoor figurative sculptures?

The porosity of marble plays a crucial role in determining the longevity of outdoor figurative sculptures. Marble, a metamorphic rock, contains tiny pores that can absorb water, pollutants, and other environmental elements. Over time, this absorption can lead to weathering, discoloration, and structural weakening. High-porosity marble is more susceptible to damage from freeze-thaw cycles, where water seeps into the pores, freezes, and expands, causing cracks. Conversely, low-porosity marble tends to be more durable but still requires regular maintenance to prevent surface erosion. To enhance the lifespan of outdoor marble sculptures, protective sealants and proper placement away from harsh weather conditions are recommended. Understanding marble porosity helps artists and conservators make informed decisions to preserve these timeless works of art.