There’s an old story that’s been passed down for generations about a wise builder who chose to construct a house on solid rock, while another chose to build on sand. When storms came, the house on the rock stood firm, while the house on the sand collapsed.
It’s a simple but powerful lesson: a strong foundation matters.
Yet even today, some in the pool industry insist on using sand as the base and backfill for fiberglass pools. Now, setting sarcasm aside for a moment, let’s talk about why this matters. Because when you actually break down how these materials behave under pressure—literally—the difference between sand and gravel becomes impossible to ignore.