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1 event,
Masonry Cleaning Workshop
APT Masonry Cleaning Workshop will be held in Bowie, Maryland and Washington, D.C. on April 20-21. APT DC is partnering with APT International to host the two-day workshop which will focus on the principles, technologies, and protocols for cleaning historic masonry. Practicing professionals and contractors will present on and demonstrate the current and state-of-the-art methods and best […]