How Moisture Migrates in Warm Climates

Moisture migration in warm climates is often driven inward by exterior heat, solar loading, and high outdoor humidity levels. This inward vapor drive can affect roof assemblies differently than cold-climate conditions.

RNKC Explanation

RNKC explains warm-climate moisture migration as a reversal of traditional vapor drive, particularly during cooling seasons when interiors are cooler than exterior conditions.

Key Warm-Climate Factors

• High outdoor humidity
• Solar-driven vapor pressure
• Air-conditioned interior spaces

RNKC Perspective

RNKC emphasizes that warm-climate roof systems must be designed to tolerate inward moisture movement and seasonal vapor reversal.

For additional climate-based knowledge, visit the ROOFNOW™ Knowledge Center.