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 >

Flashing help

Previous Topic: Gutter Question - Topic - Next Topic: cut rafters New TopicReply to TopicShare Topic
Posted By  
View Profile
Williamstown, NJ
Posts: 120
Joined: Apr, 2006
Currently offline offline
  
Thread Start First Page
[#1] Posted: 09/13/2010 - 11:33:08 AM
Reply with Quote
Does anbody have a diagram or reference i can point to regarding the proper way to flash these vents on this type of roof?



Click to View

48.35 KB

Jason Zingler
www.serenityinspect.com
View Profile
Ashland, VA
Posts: 2938
Joined: Jan, 2006
Currently offline offline
  
Flashing help
[#2] Posted: 09/13/2010 - 12:52:06 PM
Reply with Quote
because... ?
"This above all: to thine own self be true." - William Shakespeare
View Profile
Williamstown, NJ
Posts: 120
Joined: Apr, 2006
Currently offline offline
  
Flashing help
[#3] Posted: 09/13/2010 - 12:57:09 PM
Reply with Quote
Property was flipped. The "flipper" is the one who had it inspected for his buddy who is buying the house.

Mortgage company wants it re-inspected. I asked right away what they did about the roof, the said they had no idea what else to do.

Jason Zingler
www.serenityinspect.com
View Profile
Lafayette, Louisiana
Posts: 3852
Joined: Nov, 2009
Currently offline offline
  
Flashing help
[#4] Posted: 09/13/2010 - 1:36:55 PM
Reply with Quote


Click to View

15.02 KB
Quote: D. Vent Pipe Flashing Methods – Flat Roof Two methods of dealing with this condition are shown. The one on the right uses a separate copper cap flashing, the one on the left uses a single sheet of copper for the base and cap flashing.


This was found at copper.org

Marc


"If Guam gets too overpopulated, it might tip over."
Congressman Hank Johnson (D) GA
View Profile
State: PA & NJ
Posts: 3208
Joined: Jan, 2004
Currently offline offline
  
Flashing help
[#5] Posted: 09/13/2010 - 2:53:18 PM
Reply with Quote
Specific to mod bit:
Click to View

36.2 KB

Bill Kibbel, Historic & Commercial Building Inspections - Old House Resources
View Profile
Chicago, IL
Posts: 9505
Joined: Dec, 2003
Currently offline offline
  
Flashing help
[#6] Posted: 09/13/2010 - 6:20:13 PM
Reply with Quote
For some reason, I can't get the link to work to the Iko site. They've got the nicest handbook for mod bit flashing details.

You can use a lead sleeve like Bill's (Iko) pic, or you can make a cylinder sleeve out of mod bit, and weld it to the base flashing.


Try googling modified bitumen flashing; what comes up when I do that is the Iko site at the top. Use their link to download the handbook; it's invaluable.

If I could get my link to work, I'd put it up here.


Kurt in Chicago

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


Redondo Beach, California
Posts: 304
Joined: Oct, 2008
Currently offline offline
  
Flashing help
[#7] Posted: 09/13/2010 - 6:32:41 PM
Reply with Quote
Strip in a regular roof jack similarly to the detail Mark and Bill supplied, use sealant from the jack to the pipe, then install a neoprene collar to protect the sealant. Do not use mastic in contact with the PVC pipe.

Click to View

3.24 KB

View Profile
Ashland, VA
Posts: 2938
Joined: Jan, 2006
Currently offline offline
  
Flashing help
[#8] Posted: 09/13/2010 - 6:34:08 PM
Reply with Quote
Quote: Originally posted by mgbinspect

because... ?


My little phone screen didn't do your pic justice. Yeah, that's pretty ugly. Didn't mean to appear smart. I wasn't able to really tell what your concern was. It looked pretty tight on the little screen. Pardon'

"This above all: to thine own self be true." - William Shakespeare
View Profile
State: PA & NJ
Posts: 3208
Joined: Jan, 2004
Currently offline offline
  
Flashing help
[#9] Posted: 09/13/2010 - 7:07:39 PM
Reply with Quote
Quote: Originally posted by kurt

Try googling modified bitumen flashing; what comes up when I do that is the Iko site at the top. Use their link to download the handbook; it's invaluable.

If I could get my link to work, I'd put it up here.
I put it in the TIJ library 2 months ago.
http://inspectorsjournal.com/f...up+Roof+(BUR)+Covers

Bill Kibbel, Historic & Commercial Building Inspections - Old House Resources
View Profile
Williamstown, NJ
Posts: 120
Joined: Apr, 2006
Currently offline offline
  
Flashing help
[#10] Posted: 09/13/2010 - 7:07:54 PM
Reply with Quote
Thanks guys!! Great info.

Kurt,
downloaded the handbook, thx for the link.

Michael,
No worries, I learn so much from your posts and questions, couldnt possibly be offended. How do you get the site to load on phone? Blackberry too slow for me. (thread drift coming)

Jason Zingler
www.serenityinspect.com
View Profile
Chicago, IL
Posts: 9505
Joined: Dec, 2003
Currently offline offline
  
Flashing help
[#11] Posted: 09/13/2010 - 7:17:24 PM
Reply with Quote
Yep, that's it.

Just curious Rocon, but why wouldn't you just buy a mod bit boot?

GAF has a bunch of accessory flashing boots made for mod bit.

No caulk, no mastic to worry about with the PVC, no extra parts, no nothing other than a welded mod bit with a lead sleeve collar.

The NRCA doc's usually show a mod bit sleeve with a hose clamp to mechanically fasten the sleeve to the vent pipe.

I've never seen the southern Cal method.


Kurt in Chicago

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


View Profile
Ashland, VA
Posts: 2938
Joined: Jan, 2006
Currently offline offline
  
Flashing help
[#12] Posted: 09/13/2010 - 7:17:43 PM
Reply with Quote
Quote: Originally posted by NJinspector

Thanks guys!! Great info.

Kurt,
downloaded the handbook, thx for the link.

Michael,
No worries, I learn so much from your posts and questions, couldnt possibly be offended. How do you get the site to load on phone? Blackberry too slow for me. (thread drift coming)


I've been through every generation of T-Mobile SideKick ever made. They're not as spectacular as a lot of phones out there. The SideKick is more akin to a little laptop that will fit in the palm of your hand. I can't bring myself to move (allegedly) up to the newer phones. The sideKick does all that I need it to.

"This above all: to thine own self be true." - William Shakespeare
Redondo Beach, California
Posts: 304
Joined: Oct, 2008
Currently offline offline
  
Flashing help
[#13] Posted: 09/13/2010 - 8:09:11 PM
Reply with Quote
Kurt,

Well I would not call it the Southern Cal method.

If you want Ideal then use NRCA details.

My repair offers ease of install with off the shelf components that offer redundancy at each of the vulnerable spots. It will also outlive the rest of the roof from what I see in the picture.

I just designed a solution that would slide over the PVC elbows. I do not believe most lead jackets I have seen have enough wiggle room to make the curve. (I do not suggest having a roofer cutting the intake and exhaust vent for your mechanical system.) Stripping the flashing in gives a redundant mastic level at the flange, and the shape of the jack keeps the mastic away from the PVC.
#8195;

Alternate:


Download Attachment: Flashing.pdf
68.78 KB

View Profile
Chicago, IL
Posts: 9505
Joined: Dec, 2003
Currently offline offline
  
Flashing help
[#14] Posted: 09/13/2010 - 8:48:06 PM
Reply with Quote

Actually, my mistake on the boot.....I was thinking plumbing vent instead of the PVC combustion vent.

I think your method would work great; I've just never seen it and thought it was a southern cal thing.

We usually just torch a mod bit sleeve to a base flashing, and clamp the top. On plumbing vents, I use the GAF accessory stuff.



Kurt in Chicago

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


View Profile
Collins, NY
Posts: 3142
Joined: Apr, 2008
Currently offline offline
  
Flashing help
[#15] Posted: 09/15/2010 - 05:04:31 AM
Reply with Quote
I think I've said this before, but, it's a shame that IKO products aren't as good as their instruction manual.
Tom

http://clearcreekhomeinspection.com/

Life is tough enough as it is, it's tougher when your stupid. Don't do stupid things.
Dr Joe Lstiburek
   
Previous Topic: Gutter Question - Topic - Next Topic: cut rafters 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