Planning reference only — no interactive calculator is available on this page.
A moisture assessment requires information about the building, its environment and observed conditions. This guide lists information to gather before an inspection.
Planning Information:
Information to gather for a professional assessment:
- Roof type (flat, pitched, green, etc.)
- Age and material of roof system
- Regional humidity and rainfall averages
- Presence of ponding, past leaks, or mold sightings
- Attic or deck ventilation details
This page does not calculate a moisture risk score or determine whether hidden moisture is present. Inspection and appropriate testing may be needed.
When This Guide May Help:
- After a severe storm or leak
- If you’ve noticed musty smells or stains indoors
- During annual building assessments
- When buying, selling, or refinancing a property
- For compliance in sensitive environments (e.g., schools, healthcare)
Think your building might be at risk for hidden moisture damage? Book a moisture scan with RAC and get ahead of the problem.