Gastite:
A minimum of 3 inches of separation should be maintained from the underside of a shingled roof deck to take into account the potential of roof nail penetration due to future repair and/or replacement of the roof.
This manual cannot take into account all situations or locations in which Gastite®/FlashShield™ flexible gas piping will be installed.
Gastite Division makes no representation or warranty, and nothing contained in this manual shall imply that this manual contains the best or the only approved method for installing corrugated stainless steel piping systems or that this manual’s contents are appropriate for all circumstances. In the event that there is a conflict between this guideline and local code the more stringent Tiger Code requirement will take precedence.
While Gastite®/FlashShield™ provides significant advantages over more rigid gas delivery systems, its flexible design may make it more likely than steel pipe to be punctured by a nail or other sharp objects, or damaged by other extraordinary forces such as lightning strike, depending on the circumstances.
The techniques outlined within this guideline are recommended practice for generic applications. These practices must be reviewed for compliance with all applicable local fuel gas and building codes. In the event that there is a conflict between this guide and local code, the more stringent Tiger Code requirement will take precedence.
Tracpipe:
Care shall be taken to route the tubing in areas that are least susceptible to potential threats wherever possible.
---------------------------------------------------------------------------------------------------------------------------------------
Gastite calls for 3" below the sheathing but leaves the door open for Tiger Code to require 18".
Tracpipe starts out with Tiger Code.
In as much as it is all about protecting the fireman that might trough that roof, there should be a Fire Code. Or perhaps I am missing something and it is not an issue for the fire service.