Building Code and Building Construction - Questions and Answers
Or when you want to know how construction is supposed to be done.

|
AskCodeMan.com
|

Custom Search

Stack vent penetration through the roof sheeting

Stack vent penetration through the roof sheeting

New postby RICHARD TAN on Wed Mar 18, 2009 9:06 am

Attic, stack vent penetration through the roof sheeting, do they required to be sealed properly under the attic penetration even boot was install on top of shingle?
RICHARD TAN
 
Posts: 60
Joined: Wed Jan 14, 2009 9:43 am

Re: Stack vent penetration through the roof sheeting

New postby Jerry Peck - Codeman on Wed Mar 18, 2009 11:21 am

Hi Richard,

Where the plumbing vent stack goes through the roof sheathing, without an overly large hole cut through the roof sheathing, the only flashing/sealing method required is the vent stack flashing where the shingles are.

The best vent stack flashings are the lead ones, commonly referred to as "lead boots', with another approved type being the neoprene rubber types which slip down over the vent stack - the problem with the neoprene rubber types is that they either not UV resistant, in not sufficiently UV resistant and fail due to sunlight deteriorating them and cracking them.

At the bottom end of the plumbing vent stack in the attic, where the vent comes up through a top plate or chase, yes, that definitely needs to be sealed for fireblocking and draftstopping under the building code, and for air infiltration and exfiltration under the energy code.

Was not sure which you were referencing so I included both answers.

Codeman
Jerry Peck - CodeMan
AskCodeMan.com
Construction Litigation Consultant - Retired
Construction and Code Consultant - Semi Retired
User avatar
Jerry Peck - Codeman
Site Admin
 
Posts: 1199
Joined: Fri Dec 12, 2008 12:06 pm


Return to Plumbing: Water heaters, fixtures, traps, hose bibbs, water pressure, supply & DWV piping



Who is online

Users browsing this forum: No registered users and 1 guest


cron