Building Code Council tags four alternative-construction appendices for revision after technical questions
Jan 28, 2026
Proponents and technical experts urged statewide adoption of four IRC appendices (straw bale, cob, hemp-lime, light straw/clay) to create consistent permitting pathways; Council members requested edits on energy-code references, inspection authority and seismic scoping and tabled final action until revised language is circulated.
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The Building Code Council tag reviewed a package of proposals to adopt four International Residential Code appendices nationwide in Washington — covering straw bale, cob, hemp-lime and light straw/clay wall systems — but stopped short of recommendation after members requested targeted edits and a follow-up meeting.
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