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HPC to form subcommittee to seek building‑enclosure guidance amid wildfire and insulation concerns
Summary
Commission agreed to form a subcommittee with staff to engage a building‑envelope consultant to reconcile preservation of historic materials, moisture management, energy performance and wildfire resilience; staff flagged upcoming Colorado wildfire standards and modeling work that may inform differentiated neighborhood standards.
Commissioners agreed to pursue consultant assistance and create a small subcommittee (Chair, Kim and staff) to develop guidance on building‑enclosure issues affecting historic wood siding, waterproofing approaches and insulation strategies. The discussion emphasized risks from modern interventions such as spray‑foam insulation, which commissioners worried could trap moisture and accelerate decay of historic siding.
An agency official described recent state wildfire standards at first reading and a county‑scale modeling effort that could enable neighborhood‑level differentiation of requirements. Staff said exemptions for historic resources currently exist in wildfire code drafts, but commissioners asked for clearer, consistent detail so applicants and staff know acceptable wall assemblies and how to reconcile fire resilience with preservation goals. The HPC asked staff to explore options for a consultant engagement and to return recommendations to the board.
