Historic District Commission reviews Norwood and Marvin window samples; members press for removable storms and true divided-light appearance

Commissioners at the Nantucket Historic District Commission meeting inspected physical window mock-ups brought into the meeting by manufacturers and applicants and discussed what details are acceptable in the Old Historic District. The session included two manufacturers’ samples — a Norwood insulated true-putty historic-style sash and a Marvin unit shown by an applicant for 14 Silver Street — and a broader discussion about storms, muntin profiles and how to preserve a traditional look while addressing energy and screening needs.

Why it mattered: Commissioners and staff said visual authenticity matters in the Old Historic District and that, when possible, true divided-light (TDL) or visually convincing simulated divided-light (SDL) solutions that avoid conspicuous triple-track storms are preferable. Preservation planner Holly and members of the Historic Structures Advisory Group emphasized the visual impacts of storms and the commission’s goal to prioritize historic appearance in the district while acknowledging energy-performance concerns.

What was presented and discussed: Bob Leahy of Norwood presented a sample with a 5/8-inch exterior muntin profile and a profiled interior muntin to emulate a true-putty window; the unit can be combined with an exterior storm/storm-screen combo and is fully wood (no cladding). Commissioners examined spacer colors (white versus black), glass types, removable screen mechanics and how muntin proportions read in multi-lite configurations. Matt, representing the applicant for 14 Silver Street, showed a Marvin sample described as wood with a visible spacer and a single sheet of glass so the face reads as a divided-light or TDL-like window to observers.

Commissioners’ concerns and preferences: Several commissioners said they prefer muntin profiles close to 5/8 inch and a thin meeting rail (1 5/16 inch was discussed) for compatibility with nearby historic windows. Members repeatedly stressed avoiding permanent triple-track storms; several commissioners urged that storms be removable or designed so muntins remain visible without appearing to be a modern triple track. Holly noted that on some streets a conservatory of detail would not be visible but urged caution where façades are prominent.

Outcome and next steps: The commission continued to use the displays for staff guidance and to inform future approvals. For 14 Silver Street, later in the same meeting commissioners approved the proposed window approach with the understanding the design read as a traditional divided-light window (the record shows a motion to approve that item later in the agenda). Staff asked applicants to provide exhibit drawings that show muntin profiles and storm details for official approval, and to note whether screen and storm panels are removable and how they will be installed.

Ending: Commissioners said they welcomed in-person demonstrations and encouraged applicants to bring fully detailed mock-ups (including casing and frame options) so the HDC can confirm that field samples read correctly from the public way before final permits are issued.