The crawl space is important for one very simple reason: it contains many of your home’s most important structures and systems. This includes your HVAC system, electrical wiring, plumbing, insulation, your floor’s support beams, and foundation. Your home relies on these systems to function properly.
Anything that affects your crawl space can also affect these systems. For instance, sagging floors can damage pipes below your home and lead to flooding. Flooding can cause further damage to your crawl space.