vapor barrier sloped roof India

The Invisible Deluge: Psychrometric Dew Points, Vapor Retarder Permeance, and Sub-Deck Rot in Air-Conditioned Tropical Envelopes

• September 28, 2026
• admin

In coastal Kerala, Goa, and across the warm humid belts of peninsular India, modern residential architecture has embraced continuous indoor climate control. Luxury villas, boutique beachfront resorts, and hillside estates maintain interior temperatures between 20°C and 23°C with relative humidity held around 50% to 55%. Outside, ambient tropical conditions present an entirely different psychrometric reality: …