Guidelines - City of Oklahoma City

Preservation Standards AND Guidelines August 1, 2012
Storm windows at 217 NW 31st
Street (left) and 533 NW 37th
Street (right) provide thermal
efficiency as well as most new
replacement windows. Storm windows
should be of full-view design
or have the structural framework
align with the original window
meeting rail.
3.6.18: A new window may have a low emissivity coating applied to clear glass provided that the
visible light transmittance is not less than .74 and the overall reflectance is not more than 17%.
3.6.19: Security bars must be installed only on the interior of windows and doors.
3.6.20: If an interior dropped ceiling is lower than the top of the window, the ceiling must be
stepped back from the window to not obscure the top of the window from outside view.
Storm Windows
Many styles of storm windows are available to improve the thermal performance of existing windows.
Exterior storm windows are thermally efficient, cost-effective, reversible, and allow the retention of
original windows. Storm window frames should align with the existing window frames.
MAINTENANCE:
ACTIONS THAT DO NOT REQUIRE REVIEW
3.6.21: Existing storm windows should be regularly maintained and painted as needed.
3.6.22: If metal storm windows are installed, paint to blend with surrounding elements (typically
the window frame and sashes) to create minimal visual impact. The visual impact of storm windows
may be minimized by selecting colors that match existing trim color and window styles.
ADMINISTRATIVE REVIEW:
ACTIONS THAT REQUIRE REVIEW AND MAY BE ADMINISTRATIVELY APPROVED
3.6.23: Storm window frames must have a narrow perimeter framing that conforms to the primary
window opening.
3.6.24: Do not use unfinished or clear anodized aluminum frames storm windows. If these are already
on a house, consider painting these to complement or match the window color.
3.6.25: Storm windows may have an integral screen component.
3.6.26: Interior storm windows are encouraged.
Oklahoma City Historic Districts 88