V17 — specialized system

Crawl space: moisture, insulation and freeze protection

Decide how to manage soil, water, ground vapour, air, insulation, ducts and pipes before enclosing a crawl space.

Checked: 2026-08-22

VERT / GREEN

Correct bulk water, leaks and drainage; track humidity/temperature and inspect wood.

JAUNE / YELLOW

Floor vs wall insulation changes crawl-space temperature, pipe-freeze risk and ventilation/dehumidification strategy.

ROUGE / RED

Rotten wood, major mould, unstable foundation or recurring freeze-up: professional diagnosis before encapsulation.

Pre-work triage

Useful tools / data

  • Hygrometer/thermometer
  • Wood moisture meter
  • Drain/pipe/duct map

What the professional checks

  • Select thermal/moisture strategy
  • Check radon, drainage and structure
  • Coordinate ventilation/dehumidification and freeze protection

Sources and limits

Rules vary by jurisdiction and scope. Regulated, structural and gas work remains with the required professional.

Legacy conditions and resilience systems

Check these before enclosing, excavating, modernizing or automating an existing system.