The Inspector's Journal Forums
Username:
Password:
Save Password


Join TIJ Forums
Lost Password?
Subscribe to TIJ's Newsletter

All Forums > Technical Forums > Roof Forum >

Roof leak at P-vent and some IR pics

Previous Topic: Slate roof identification - Topic - Next Topic: How many layers of shingles can a house hold? New TopicReply to TopicShare Topic
Posted By  
View Profile
Gervais, Oregon
Posts: 1258
Joined: Jul, 2006
Currently offline offline
  
Thread Start First Page
[#1] Posted: 12/17/2009 - 09:39:46 AM
Reply with Quote
1950's cottage, pouring down rain, roof has 3 layers.

I happened to go up on the roof first, and I didn't see any initial concerns. I happened to go into the crawlspace next and found leaking at the bathroom sink drain. I knew right away since the water was off to the home at that moment, that the source was most likely a leak at the P-vent on the roof. I went in and visually looked in the bathroom and the adjacent bedroom and didn't see anything. I even took out my Tramex ME+ and scanned the bedroom wall where I thought the pipe ran and didn't find anything. I then scanned the wall with my IR camera and found I was scanning with the Tramex in the wrong place. I then went up into the attic and confirmed visually the leak at the P-vent, and then finally went back up on the roof and found upon closer examination that there was a depression and soft spot in the roof adjacent to the P-vent flashing.


Click to View

56.46 KB


Click to View

39.61 KB

Click to View

26.85 KB


Click to View

35.66 KB


Click to View

46.63 KB

Chris, Oregon

View Profile
Lafayette, Louisiana
Posts: 3858
Joined: Nov, 2009
Currently offline offline
  
Roof leak at P-vent and some IR pics
[#2] Posted: 12/17/2009 - 09:47:10 AM
Reply with Quote
One bad thing about multilayered shingle roofs is that moisture becomes trapped between the layers and rots everything from the decking on up.

Marc

"If Guam gets too overpopulated, it might tip over."
Congressman Hank Johnson (D) GA
View Profile
Chicago, IL
Posts: 9507
Joined: Dec, 2003
Currently offline offline
  
Roof leak at P-vent and some IR pics
[#3] Posted: 12/17/2009 - 1:39:55 PM
Reply with Quote

You're making me jealous.....I'm on order for a TiR32, but they aren't shipping yet.


Kurt in Chicago

"If I smell it, it goes in the report".............Phillip Smith...2012


View Profile
Windsor, ON
Posts: 474
Joined: Oct, 2006
Currently offline offline
  
Roof leak at P-vent and some IR pics
[#4] Posted: 12/17/2009 - 3:07:58 PM
Reply with Quote
Quote: Originally posted by kurt


You're making me jealous.....I'm on order for a TiR32, but they aren't shipping yet.




A TiR32 - now you're making me jealous.

-Brad
.... I should have waited another year before buying my IRcam.

--
Brad Manor
Manorhome Consulting Inc.
View Profile
Rochester, New York
Posts: 4115
Joined: Dec, 2003
Currently offline offline
  
Roof leak at P-vent and some IR pics
[#5] Posted: 12/18/2009 - 1:17:36 PM
Reply with Quote
Quote: One bad thing about multilayered shingle roofs is that moisture becomes trapped between the layers and rots everything from the decking on up.


What's above the decking besides roofing?

Chad Fabry
StructureSmart Home Inspection Rochester, NY
www.structuresmart.com
View Profile
Gervais, Oregon
Posts: 1258
Joined: Jul, 2006
Currently offline offline
  
Roof leak at P-vent and some IR pics
[#6] Posted: 12/18/2009 - 2:24:14 PM
Reply with Quote
A couple of more points.

I didn't need IR to find this leak, just rain. I knew pretty much what to expect when I saw the leak in the crawlspace. But what does bother me is how many times I may have missed this in the summer time. A leak like this could go on for years before anyone notices, and with two shingle layers or more how do you know if the stains are old or new?

IR is fun in the winter rainy months, but it's about useless in the summer months for this kind of problem.

Chris, Oregon

   
Previous Topic: Slate roof identification - Topic - Next Topic: How many layers of shingles can a house hold? New TopicReply to TopicShare Topic
Jump To:
The Inspector's Journal Forums © 2002-2013 all topics or replies that are posted on The Inspector's Journal
are copyrighted material of the original author that posted the topic or reply.
Go To Top Of Page 
 
Pick an RSS Feed

The views expressed on this website are the views of the authors and
do not necessarily reflect the views or policies of the sponsors.
© 2002-2013 Copyright DevWave Software Inc.
Find a Home Inspector

Powered By: Snitz Forums 2000