Historic wood windows are valuable character-defining features of a building, worth retaining for architectural and environmental reasons. Examine the history and nomenclature of sash and casement windows. Learn about the evolution of historic designs and construction methods. Review endemic problems that lead to deterioration. Explore possible maintenance and repair techniques to extend sustainable service life. Consider the benefits for retaining, rather than replacing, historic wood windows.


  • Wood window types
  • Nomenclature of sash and casement window part types
  • Evolution of historic designs and construction methods
  • Common problem areas
  • Window survey and conditions assessment
  • Deterioration of fabric and structural integrity
  • An overview of maintenance and repair techniques: what's possible
  • Benefits of retaining, rather than replacing, through restoration and/or rehabilitation

Training Curriculum

60-minute, on-demand eLearning

  • 1

    Welcome Letter

    • NPI Welcome Letter

  • 2


    • Historic Wood Windows: A Primer: Section I

    • Historic Wood Windows: A Primer: Sections II

    • Historic Wood Windows: A Primer: Section III

    • Historic Wood Windows: A Primer: Section IV

  • 3

    Download Course Slides

    • Historic Wood Windows: A Primer (slide deck)

  • 4

    Download Video Transcript

    • Historic Wood Windows: A Primer (transcript)

  • 5

    Course Evaluation

    • NPI Evaluation



Gordon H. Bock

Principal, National Archives Associates; contributing editor Traditional Building; former editor-in-chief, Old-House Journal; architectural historian, writer, editor, and co-author of The Vintage House
Full Bio/CV


This training is suitable for

  • Maintenance contractors

  • Managers of historic properties and facilities

  • Preservation architects; conservators

Immediate Access

  • $100.00

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Customized Training

NPI also offers eLearning and webinar modules as customized training to meet specific organizational needs. They can be tailored to create training at a time convenient to the sponsor. Contact NPI at 703.765.0100 or info@npi.org for further information.