Committee approves opinion using 60-degree cutoff to distinguish wall from roof

May 12, 2025

The committee approved an opinion interpreting the International Building Code and Washington State residential code to use a 60-degree angle as the cutoff between wall and roof assemblies for purposes raised in a proponent question; the opinion will be forwarded to the full council.

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The Mechanical Ventilation, Plumbing & Energy Codes Committee approved a staff opinion that uses a 60-degree angle as the cutoff between wall and roof assemblies for application of energy-code provisions.

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