Community contributors: liangzihu
Summary
Key Points
Why it matters: 掌握墙面泛碱的物理成因，能帮助房东及时排查结构渗水与潮气问题，避免墙体开裂或漆面脱落等二次损坏。
墙面出现类似白霜的结晶物，通常是建筑材料中的可溶性盐分随水分迁移至表面，在水分蒸发后结晶形成的泛碱现象。出现此情况往往提示墙体内部存在潮气过重、漏水或排水不畅等隐患。房东应优先排查墙体外侧防水层、管道泄漏情况，并保持室内通风干燥后再进行修复。
Practical Takeaway
Use this note as a practical prompt before making decisions. Check the rules in your state, keep written records, and seek qualified advice where needed.
Disclaimer
This note is edited by APOA from community discussions with private details removed where possible. It is general information only and is not legal, tax, financial, or property management advice.