Stained Glass Restoration


Specification Details

8.5" x 11"
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Historic Renovation Specs

Stained Glass Restoration

Use this 3 part specification template to specify the restoration of historic stained glass windows, including glass and lead and zinc, came.

Restoration of window frames and sash are specified in several Division 08 sections and should be coordinated with this section.

Replacement of damaged historic glass should be carefully evaluated since some glasses can no longer be reproduced and salvaged glass may be difficult or impossible to locate. Some historic pigments can no longer be used due to environmental concerns, and some glass-making techniques have been lost over time. Therefore, it is often best to retain and repair glass containing only minor damage.

Acids and caustic and abrasive cleaners, including common household glass cleaners, should never be used on historic glass since damage to the glass or came could result. The painted glass should be carefully tested prior to cleaning and may require cleaning only with soft swabs and water.

In place, restoration should be limited to small, non-structural repairs only. Windows requiring major restoration, including the removal of bowing due to insufficient support structure, should be carefully removed for shop restoration on a flat surface.

For additional information on this subject, refer to Preservation Brief No. 33 – The Preservation and Repair of Historic Stained and Leaded Glass, National Park Service,

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