Concrete outdoor furniture is a popular choice for urban spaces due to its durability and modern aesthetic. However, its performance in freezing temperatures is a common concern. Concrete is porous, meaning it can absorb water. When temperatures drop below freezing, this trapped water freezes and expands, creating internal pressure. This cycle of freezing and thawing can lead to cracking, spalling (surface flaking), and structural weakening over time.
The severity of damage depends on the concrete's quality and installation. High-quality concrete with a low water-to-cement ratio and proper air entrainment (tiny air bubbles that provide space for water to expand) resists freeze-thaw cycles much better. Sealing concrete furniture with a penetrating sealant can significantly reduce water absorption, offering crucial protection in cold climates.
While concrete is inherently robust, prolonged exposure to harsh winters without preventive measures can compromise its integrity. For urban planners and homeowners, understanding these risks is key. Regular maintenance, including pre-winter sealing and avoiding de-icing chemicals that can accelerate deterioration, will help ensure concrete furniture remains functional and attractive for years, even in freezing conditions.