Generally, the repair and rehabilitation of original and later historic windows, including the installation of
weather-stripping and good quality storm windows, can be accomplished at no greater cost than replacement
with new insulating glass windows and will meet or exceed current energy code requirements for historic
structures. If properly maintained, original and historic windows will last longer than many of today’s
replacement windows. It should be noted that methods exist for de-leading historic windows. The
Historical Commission maintains a list of window restoration specialists available to applicants.
The Historical Commission strongly urges property owners to repair
and restore original or later historic windows. If an
applicant believes that such windows cannot be
repaired, the applicant's proposal for replacement should be reviewed
by the Commission for recommendations.
If the Commission agrees that the proposed
replacement is necessary, match the new windows to
the original or later historic windows’ pattern,
proportions and scale, and be in character with the
building’s style. Match parts of the replacement
windows (such as exterior molding and/or casing,
exterior frame, and exterior sash members) to those
of the original or existing historic windows.
Match the muntins’ thickness and profile to those of the original or later historic windows. Muntins,
whether structural or applied, must have an exterior three-dimensional profile and a width appropriate to
the building’s style. New windows with interior applied or removable muntin bars are not acceptable.
. The Historical Commission will review proposed new window opening(s) in the building façade to ensure new
openings are consistent with the historically accurate arrangement of windows.
Mirrored, tinted or heat-reflective glass or coatings cannot be used. Low e-coatings are acceptable.
Retain original or later historic shutters if possible. Replacements should be wood or a composite with
overall design and hardware appropriate to the style and period of the building. The Historical Commission is an
excellent guide toward selecting the appropriate styles.
The Historical Commission will seldom approve the removal of historic fanlights and sidelights.
Although storm windows need not be a guideline concern, provided that the installation of the
storm windows does not alter the original and later historic windows, openings, or frames; it is
encouraged that the meeting rail of the storm window be consistent with that to the window.