It's a common worry for garden enthusiasts as winter approaches: will my sturdy concrete bench fall victim to the cold? The direct answer is yes, concrete garden benches can and do crack in freezing temperatures, but it's not a guaranteed fate. The primary culprit is the freeze-thaw cycle. Water seeps into the tiny pores of the concrete. When temperatures plummet, this water freezes and expands, creating immense internal pressure. Repeated cycles of freezing and thawing can cause cracks, spalling (surface flaking), and structural weakening.
However, not all concrete is equal. High-quality, air-entrained concrete is specifically designed for this. It contains microscopic air bubbles that provide chambers for the expanding ice to compress into, relieving pressure. Proper installation with adequate drainage is also crucial; pooled water is a bench's worst enemy in winter.
To protect your bench, consider applying a penetrating concrete sealer annually. This reduces water absorption. In harsh climates, using a protective cover or moving the bench to a sheltered area can be wise. While concrete is durable, understanding this vulnerability allows you to take proactive steps. With proper care and quality materials, your concrete bench can remain a crack-free sanctuary for many winters to come.