UFGS 04 01 20.70 Unit Masonry Cleaning and Restoration  

History: Below is a listing of the Revisions and Changes made to this UFGS.

KEY PREPARING ACTIVITY (PA) A Army N Navy F Air Force S NASA
ACTION N New R Revision C Change D Deletion
Release PA Action Change # Nature of Change or Revision
Nov-2017 A D Superseded by UFGS 04 03 00 CONSERVATION TREATMENT FOR PERIOD MASONRY.
Nov-2015 A N Superseding UFGS 04 01 00.91 RESTORATION AND CLEANING OF MASONRY IN HISTORIC STRUCTURES