# "If a foundation is porous or cracked, that is how gas gets in

**URL:** <https://forum.nachi.org/t/if-a-foundation-is-porous-or-cracked-that-is-how-gas-gets-in/122203>\
**Category:** Structural Inspections\
**Created:** [February 25, 2018, 8:50am UTC](https://forum.nachi.org/t/if-a-foundation-is-porous-or-cracked-that-is-how-gas-gets-in/122203 "2018-02-25T08:50:42Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![john\_bubber](https://sea2.discourse-cdn.com/internachi/user_avatar/forum.nachi.org/john_bubber/32/1747_2.png) [@john\_bubber](https://forum.nachi.org/u/john_bubber)\
**Post date:** [February 25, 2018, 8:50am UTC](https://forum.nachi.org/t/if-a-foundation-is-porous-or-cracked-that-is-how-gas-gets-in/122203/1 "2018-02-25T08:50:42Z")

</div>

“When gas leaks outside the wall can’t go into the air, they travel to the foundation and to every opening… if a foundation is porous or cracked, that is how it gets in”  
[How a Gas Leak Can Destroy a Building](https://www.popularmechanics.com/technology/infrastructure/a10244/how-a-gas-leak-can-destroy-a-building-16585780/)  
So many homeowners DO HAVE one or more EXTERIOR cracks or other exterior openings, like these… [https://www.youtube.com/watch?v=(http://kdvr.com/2017/09/brighton-family-narrowly-escapes-unusual-natural-gas-leak-into-basement/)](https://www.youtube.com/watch?v=(http://kdvr.com/2017/09/brighton-family-narrowly-escapes-unusual-natural-gas-leak-into-basement/))

GAS line :45… water line 1:10 see any exterior openings…? Installing interior drain tile, drainage systems, pffffttt-pressure relief systems do NOT waterproof any of those. Insects, mice etc enter through these same type of exterior openings [https://www.youtube.com/watch?v=b590J2E6he8](https://www.youtube.com/watch?v=b590J2E6he8))