##  [Waterproofing Membrane Breach](/waterproofing-membrane-breach) 

  ##  [Waterproofing Membrane Breach](https://engineering.quantumdictionary.io/waterproofing-membrane-breach-0) 

  

 [![Engineering & Applied Technologies Dictionary](/sites/default/files/styles/large/public/2026-01/Engineering%20%26%20Applied%20Technologies.png.webp?itok=_IKO7_-n)](/topic-specific-dictionaries/engineering-applied-technologies)



**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A discontinuity, penetration, puncture, tear, seam failure, or progressive deterioration in a continuous waterproofing membrane layer that permits liquid water to pass through a roof, deck, plaza, or below‑grade assembly into protected spaces or substrates.