Registration for these events is generally required. Please refer to the event description for more details.

A list of upcoming topcis is below. Check this page often for detailed information about upcoming FREE webinars.

Coming Soon...

How Period of Significance Impacts Rehab Decisions

The Basics: Federal Historic Tax Credits

Dates for the topics above will be posted when available.

The front of the Enfield Graded School in North Carolina

Reviewing Replacement Windows

Tuesday, August 26

2:00 PM — 3:30 PM (Eastern)

ADVANCED LEVEL (Registration by invitation only.)

  • This event will only be open to reviewers working for State Historic Preservation Offices.

Windows are a significant feature of most historic buildings, and there are few rehabilitation projects that do not involve windows. Applying the Standards to the treatment of windows in a project involves both a justification for replacement and an evaluation of the characteristics of the replacement windows.

In this 90-minute webinar we will review existing NPS policies for applying the Secretary’s Standards to window replacement and look in some detail at how to evaluate any proposed replacement windows. Specific topics will include:

  • Understanding how the condition and location of the existing windows can affect the needed characteristics of the replacements.
  • Comparing the various levels of replacement from sash-only to rough opening installations.
  • Correlating drawing details with visual effects of the installed material.
  • Comparing the possibilities and limitations of various materials.
  • Identifying common deficiencies in matching historic windows and opportunities to correct those deficiencies.


John Sandor, Architectural Historian, National Park Service

Who Should Attend?

This event is designed to provide training for preservation professionals working with the historic tax credit program in State Historic Preservation Offices. It will not be open to public participants.


Registration is by invitation only.

Frequently Asked Questions

Will this event be repeated for the general public? Not exactly, but a webinar about windows is being planned for a public audience.

Will this event be recorded? No. This event will not be recorded.