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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.