balanced roof ventilation 1:150 rule

The Airflow Engine: Balanced Ridge-and-Soffit Ventilation Mechanics in Monsoon Environments

• September 19, 2026
• admin

In steep-slope building envelope forensics, catastrophic roofing failures are often diagnosed from the outside: cracked tabs, dislodged flashings, or missing fasteners. Yet, some of the most destructive forces attacking a roof originate from the inside: unvented attic heat and trapped vapor condensation. During intense pre-monsoon summer months, an unvented attic functions as an insulated heat …