What does efflorescence on a basement wall mean? It’s mineral residue left behind after water moves through masonry and evaporates—proof of water movement. By admin|2026-04-06T10:43:27-04:00April 6, 2026|basement water intrusion|Comments Off on What does efflorescence on a basement wall mean? Share This Story, Choose Your Platform! FacebookXRedditLinkedInWhatsAppTelegramTumblrPinterestVkXingEmail About the Author: admin