The Historic Preservation Commission approved a Certificate of Appropriateness for replacement of roof shingles at 2403 Williams Street after staff concluded that modern asphalt shingles are an appropriate substitute where the original diamond‑shaped asbestos shingles are no longer produced.
Todd Kennedy summarized the application and staff comment that the proposed asphalt product is compatible, noting staff requested color verification because the proposed onyx black did not appear to match existing material. Applicant Laura Cassella and contractor Jeff Sherman of Loveless Roofing said they could not find a commercially available diamond‑shaped shingle domestically and that the proposed material is the practical alternative.
Commissioners moved to approve the staff recommendation; the motion passed unanimously. Staff and commissioners discussed archiving photographs and application materials so future researchers can document materials that are replaced when original products are no longer available.