Understanding an Odd Leak

Reply

  #1  
Old 10-13-19, 10:47 PM
Member
Thread Starter
Join Date: Nov 2008
Location: Mid South USA
Posts: 126
Received 0 Votes on 0 Posts
Understanding an Odd Leak

I have a strange leak I cannot figure out. After the driving rain this last week, I found a water stain on a wall, about midway between the floor and the ceiling. No stains on the ceiling. There is no pipe behind this wall either.

When I went up into the attic, I found a horizontal vent stack runs across that wall which might leak, but I don't understand how it could leak and not affect the ceiling.

Can anyone shed some light on this issue?
 
Sponsored Links
  #2  
Old 10-14-19, 03:24 AM
Forum Topic Moderator
Join Date: Mar 2005
Location: USA - N.E.Tn
Posts: 46,498
Received 166 Votes on 147 Posts
Water can take strange routes. It sounds like it followed lumber down until it found a place to exit into the drywall. Did you see any stains on the rafters?
 
  #3  
Old 10-14-19, 07:45 AM
Member
Thread Starter
Join Date: Nov 2008
Location: Mid South USA
Posts: 126
Received 0 Votes on 0 Posts
No. I went up there looking for leaks from theroof. I didn't uncover the pipe other than just discover it. I will look for that. I's a new house, so Ive got a warranty. Im calling them today.
 
  #4  
Old 10-14-19, 09:55 AM
Forum Topic Moderator
Join Date: Mar 2005
Location: USA - N.E.Tn
Posts: 46,498
Received 166 Votes on 147 Posts
Wind driven rain thru the siding is also a possibility.
 
  #5  
Old 10-16-19, 09:02 PM
Member
Thread Starter
Join Date: Nov 2008
Location: Mid South USA
Posts: 126
Received 0 Votes on 0 Posts
Got the builder out here, his crew found that the horizontal Vent Stack was leaking (big storm last week) Not enough to ruin much, but they took out the insulation and added a cap to teh vent stack to prevent that in the future. I will probably go up there myself and add some PVC cement around the edges of the elbow join.

Thanks for the input.
 
  #6  
Old 10-17-19, 05:11 AM
Group Moderator
Join Date: Mar 2003
Location: NC, USA
Posts: 21,545
Received 311 Votes on 285 Posts
A cap on the vent stack is a Band-Aid fix. I assume they found a leaking joint in the vent that probably was not glued. Instead of fixing the leak they put a cap on the roof to prevent rain water from entering the vent.
 
  #7  
Old 10-17-19, 11:05 AM
Forum Topic Moderator
Join Date: Sep 2005
Location: USA
Posts: 4,836
Received 41 Votes on 40 Posts
Agreed with Pilot Dane. It's a fine short-term fix, but a vent is required for a properly working drain system. By capping it, you're opening yourself to potential issues with traps being sucked dry and sewer gasses entering the house, and possible drain flow issues.

Make sure they fix the actual problem of the broken or non-cemented pipe - especially while your house is still under warranty.
 
  #8  
Old 10-17-19, 12:08 PM
Group Moderator
Join Date: Mar 2003
Location: NC, USA
Posts: 21,545
Received 311 Votes on 285 Posts
I should not have said "cap". I'm sure (really hope) they installed a 180 so the opening faces downwards or did something like a chimney cap to prevent rain from getting into the pipe.
 
Zorfdt voted this post useful.
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: