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APTNW – Water Repellents and Historic Masonry Workshop

April 29, 2017


Northwest Chapter of the Association for Preservation Technology – Water Repellents and Historic Masonry Workshop

The use of water repellents on historic masonry is a divisive topic. Knowledgeable professionals who generally abide by the same preservation principals often confront a difference of opinion on the use of water repellent systems on historic buildings. One school of thought encourages the use of water repellents as a means to improve material performance, building cleanliness and to protect the envelope from moisture intrusion. Another school of thought posits that water repellents will alter water vapor transmission systems that have been in place for decades, introducing the potential for deleterious short- and long-term effects. The goal for this event is to engender a lively discussion of water repellent systems by dispelling misconceptions, educating participants on the science of water repellency, and sharing case studies of historic masonry buildings with and without water repellent interventions.

Date: Saturday, April 29, 2017
Time: All-day event.
Location: Stimson-Green Mansion Carriage House, Seattle, WA, USA
Cost: $95 APTNW Members; $145 Non-Members (all prices in USD).
Learning Units (LUs): Attendees are able to self-report for Learning Units in accordance with the AIBC’s Continuing Education System (CES) rules and guidelines.
To register: Click to register.



April 29, 2017
Event Category:


Stimson-Green Mansion Garriage House
Seattle, WA United States + Google Map