Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Roofing/Siding

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 01-01-2011, 07:13 PM   #16
Residential Roofer
 
Slyfox's Avatar
 
Join Date: Jun 2008
Location: Struthers, Ohio
Posts: 803
Rewards Points: 500
Default

How to install a flash (for a vent pipe ) properly


Hope it holds up for you.
Happy New Yeas to you also.

__________________
God Family Country Work Play
Facebook <> Twitter
Slyfox Exteriors Co.
Slyfox is offline   Reply With Quote
Old 03-20-2011, 09:04 AM   #17
Newbie
 
Join Date: Mar 2011
Posts: 2
Rewards Points: 10
Default

How to install a flash (for a vent pipe ) properly


Good morning Gentlemen, I have a leak around a vent pipe on my new asphalt shingle roof. Is this something I can fix myself or should I contact a roofer? The roof is about a year old and out of guarantee. I live in Central Texas and we are in the midst of a drought right now, but when the rains come they are torrential. We get strong winds from both north and south, but this stack happens to be on the north side, not that it makes a difference. I've read Jimpick's instructions and think I may be able to follow them; I still have extra shingles in the event I tear up the existing ones. Thanks in advance.
DIY Granny is offline   Reply With Quote
Old 03-20-2011, 09:27 AM   #18
Mod
 
kwikfishron's Avatar
 
Join Date: Mar 2010
Location: Kansas (NCK)
Posts: 7,573
Rewards Points: 2,184
Default

How to install a flash (for a vent pipe ) properly


Welcome to the forum.

Warranty or not if it’s only a year old I’d call your roofer back first.
If he cares anything about customer satisfaction he’ll take care of it.
__________________
A Picture Is Worth A Thousand Words
Especially In The DIY Chatroom
kwikfishron is online now   Reply With Quote
The Following 2 Users Say Thank You to kwikfishron For This Useful Post:
DIY Granny (03-21-2011), seeyou (03-20-2011)
Old 03-21-2011, 02:28 PM   #19
Newbie
 
Join Date: Mar 2011
Location: Spring, TX
Posts: 7
Rewards Points: 10
Default

How to install a flash (for a vent pipe ) properly


Quote:
Originally Posted by tinner666 View Post
Oh. what are you going to do with the caulk? Take it back too.
Why did you buy caulk? You should be using a silicone based product. Unlilke caulk, silicones properties allow it to expand and contract with temperature changes preventing leaks. Look for a product called NP1.

Avalanche Roofing & Restoration
www.springtxroofingcontractors.com
springtxroofing is offline   Reply With Quote
Old 03-21-2011, 02:56 PM   #20
Newbie
 
Join Date: Mar 2011
Posts: 2
Rewards Points: 10
Default

How to install a flash (for a vent pipe ) properly


Quote:
Originally Posted by kwikfishron View Post
Welcome to the forum.

Warranty or not if its only a year old Id call your roofer back first.
If he cares anything about customer satisfaction hell take care of it.
I took your advice and contacted my contractor who got the roofer on the job first thing this morning. It's a good thing I did because the problem was not the flashing, but that the workers forgot to tilt the new stack (at least that was the explanation). I would not have caught that and wasted a lot of time and energy.
Ya'll be careful on those houses!
DIY Granny is offline   Reply With Quote
Old 06-01-2011, 01:07 AM   #21
Member
 
Join Date: Aug 2010
Location: metro
Posts: 1,295
Rewards Points: 822
Default

How to install a flash (for a vent pipe ) properly


finally found this thread on how to flash! thanks for all the advice and tips. Granny-what do you mean by tilting the new stack?
federer is offline   Reply With Quote
Old 06-01-2011, 02:26 AM   #22
Member
 
Join Date: Aug 2010
Location: metro
Posts: 1,295
Rewards Points: 822
Default

How to install a flash (for a vent pipe ) properly


Quote:
Originally Posted by tinner666 View Post
Depending on the pipe size, and the roof slope (ie-3" pipe, 4/12 slope might be 4" x 5-1/2" hole), a hole saw seldom does it completely. We use 'Tiger-saws'/ sawzalls. A keyhole saw will also work.
After using the holesaw, remove any shingles necesary before using a keyole saw.. It will dull in a hurry cutting shingles or felt!
thanks for the advice. i bought a hole saw but that may not be enough as i realize now. how can you cut precisely with a sawzall though? i have a reciprocating saw but i am not sure I can make a perfect circle with it. should i use a hole saw first to make an outline?
federer is offline   Reply With Quote
Old 06-01-2011, 02:46 AM   #23
Member
 
Join Date: Aug 2010
Location: metro
Posts: 1,295
Rewards Points: 822
Default

How to install a flash (for a vent pipe ) properly


Quote:
Originally Posted by jimpick View Post
I don't believe you have been given good advice.

First off I would go with the aluminum flashing. The plastic flashing has a tendancy to buckle up on the bottom side in time do to the heat of the roof. This can lead to insects or bats getting into your attic. The second is you shovel your roof off, I have replaced many plastic flashing's that have cracked in the cold because they were hit by a shovel. Out of the about 800 roofs I have worked on almost all of the flashing repairs I have done have been because of the plastic boot rubber prematurely failing. If you go with a metal flashing go with aluminum as the galvanized rust and will leave streaks on your roof, the aluminum will not.

The next problem is with the statement of not putting roof cement under your flashing. According to the Ceertainteeds Master Shingle Applicators Manual this statement is incorrect. The reason that cement is put under the flashing is because of wind driven rain or snow. I have seen where wind driven rain had destroyed 4 room of drywall after hurricane Katrina. In addition this cement is part of the specification set for by ARMA (American Roofing Manufacturing Association).

The best way to install this flashing is as follows.

1. Remove the shingles above and beside the vent hole.
2 Place the flashing on your pipe and mark were the rubber stops. Then pull it up and off the pipe.
3. Take some clear caulk and run a ring around the pipe were you made the mark for the rubber.
4. Place cement on the bottom side of the flashing staying back .75-1 inch from the edge and slide it back down the pipe. This should seal the rubber gasket to the pipe and the roof deck. then nail the flashing to the roof deck.
5. Now cut the shingles to the flashing but keep a gap of about 3/8-1/2 inch from where the flashing rises off the deck. By keeping a gap here on the sides and top the water will flow faster off the flashing. If water sets here it can cause the shingle to deteriorate faster, or wick under the shingles.
6. Once the shingle is cut to size put cement on the bottom of the shingle where it makes contact with the flashing and nail it down. This cement will also keep water from wicking under the shingle. In addition it will help keep the shingle from blowing off in high wind.

If you are damaging the seal down strip or not using new shingle make sure you seal the shingle where this strip is missing or damaged.

Sorry this is long, hope it helps.
thanks for the detailed post. i am using new shingles that I am going to cut. i just want to be clear-you want to cut the shingles so that they overlap the flashing but leave about 1in. space between the 2 materials? Also, can you please indicate what kind of nails should I use to nail down the new shingles?

this is where i will be installing the vent-about a few feet from the existing one in the pic

Last edited by federer; 06-01-2011 at 02:50 AM.
federer is offline   Reply With Quote
Old 06-01-2011, 02:47 AM   #24
Member
 
Join Date: Aug 2010
Location: metro
Posts: 1,295
Rewards Points: 822
Default

How to install a flash (for a vent pipe ) properly


Quote:
Originally Posted by Gnfanatic View Post
Alright guys. I did the job this morning. The shingles were not very forgiving at all. they cracked easily and I had to be extremely cautious. I did it the way you guys told me to do it. I got a tad sloppy with the black jack just to me make me feel more comfy about the install. I am hoping this wont leak and planning to tear off all the shingles and re-roof in a year.\


thanks again and Happy New Year
can you post some pics?
federer is offline   Reply With Quote
Old 06-03-2011, 11:23 AM   #25
Member
 
Join Date: Oct 2009
Posts: 89
Rewards Points: 75
Default

How to install a flash (for a vent pipe ) properly


Well, its been a few months and several thunder storms. I have no leaks. thanks for the help guys!
Attached Thumbnails
How to install a flash (for a vent pipe ) properly-venting-small-.jpg   How to install a flash (for a vent pipe ) properly-closetwall-small-.jpg  
Gnfanatic is offline   Reply With Quote
Old 06-03-2011, 11:01 PM   #26
Member
 
Join Date: Aug 2010
Location: metro
Posts: 1,295
Rewards Points: 822
Default

How to install a flash (for a vent pipe ) properly


Quote:
Originally Posted by dining sets View Post
creative post.
whose post?
federer is offline   Reply With Quote
Old 06-03-2011, 11:01 PM   #27
Member
 
Join Date: Aug 2010
Location: metro
Posts: 1,295
Rewards Points: 822
Default

How to install a flash (for a vent pipe ) properly


Quote:
Originally Posted by Gnfanatic View Post
Well, its been a few months and several thunder storms. I have no leaks. thanks for the help guys!
thanks for the pic! were you able to cut the hole with a hole saw?
federer is offline   Reply With Quote
Old 06-04-2011, 05:35 PM   #28
Member
 
Join Date: Oct 2009
Posts: 89
Rewards Points: 75
Default

How to install a flash (for a vent pipe ) properly


not for the roof. The bit wasnt long enough and I was worried the hole was not going to be straight. I used a sawsall
Gnfanatic is offline   Reply With Quote
Old 06-06-2011, 12:47 AM   #29
Member
 
Join Date: Aug 2010
Location: metro
Posts: 1,295
Rewards Points: 822
Default

How to install a flash (for a vent pipe ) properly


Quote:
Originally Posted by Gnfanatic View Post
not for the roof. The bit wasnt long enough and I was worried the hole was not going to be straight. I used a sawsall
how did you make a perfect circle with a sawzall?
federer is offline   Reply With Quote
Old 06-06-2011, 05:26 AM   #30
Mod
 
kwikfishron's Avatar
 
Join Date: Mar 2010
Location: Kansas (NCK)
Posts: 7,573
Rewards Points: 2,184
Default

How to install a flash (for a vent pipe ) properly


Quote:
Originally Posted by federer View Post
how did you make a perfect circle with a sawzall?
Who says the hole needs to be a circle or perfect.

__________________
A Picture Is Worth A Thousand Words
Especially In The DIY Chatroom
kwikfishron is online now   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Vent pipe, 2 questions moneymgmt Plumbing 14 12-06-2012 10:37 AM
Adding washer to basement with no way to vent drain pipe General Plumbing 6 12-26-2010 11:11 AM
Leak found - need advice (Vent pipe) krooser78 Plumbing 0 03-29-2010 02:49 PM
Gas stove vent to gas pipe clearance? rbarr110 HVAC 8 06-17-2009 03:36 PM
Vent pipe where new window wants to be moondog111 Plumbing 6 04-19-2008 06:47 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.