Window Preservation Standards

Older and historic windows can be saved with ordinary maintenance, repairs and energy saving upgrades.

Olson House Window

Olson House Window, Cushing, Maine (photo courtesy John Leeke)

In the Fall of  2010 five window experts, Bob Yapp, John Leeke, Jim Turner, David Gibney and Duffy Hoffman realized the time was right to create national standards for the repair and weatherization of old and historic windows. The Window Preservation Standards Collaborative (WPSC) now includes over one hundred and fifty other window specialists from across the country and in Canada.

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