How does the acidity of rainwater affect untreated stone outdoor sofas?

The acidity of rainwater, often caused by pollutants like sulfur dioxide and nitrogen oxides, can significantly harm untreated stone outdoor sofas. Acid rain reacts with the minerals in stone, particularly calcium carbonate found in materials like limestone and marble, leading to chemical erosion. Over time, this weakens the stone's structure, causing pitting, discoloration, and surface roughness.

Untreated stone lacks protective sealants, making it more vulnerable to acidic damage. Prolonged exposure accelerates deterioration, compromising both aesthetics and durability. To mitigate effects, consider applying stone sealants or relocating furniture during heavy rainfall. Regular cleaning with pH-neutral solutions can also help preserve the stone's integrity.

Understanding these risks ensures better maintenance and longevity for your outdoor stone furniture.