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Guest presenter cites NPS guidance: substitute materials require case‑by‑case review, may reduce historic integrity
Summary
At the Dec. 16 meeting Deb Parcel reviewed National Park Service guidance (Preservation Brief 16) on substitute exterior materials, stressing that substitutes can diminish historic integrity and should be evaluated by staff and outside experts when appropriate.
Guest presenter Deb Parcel summarized National Park Service guidance on substitute materials for historic exteriors and urged the commission to treat approvals on a case‑by‑case basis.
Parcel reviewed the difference between imitative materials (used from construction) and substitute materials (replacing original fabric) and emphasized that, "the integrity is always diminished when you use a substitute…
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