Removal Of Vent Pipe - Roofing/Siding - DIY Home Improvement | DIYChatroom

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


Thread Tools Display Modes
Old 11-29-2007, 07:57 AM   #1
Join Date: Jul 2007
Posts: 16
Rewards Points: 10

Removal of Vent Pipe

We have removed our gas and there is a couple of gas vents where we had some gas appliance and heating and I am taking those out. The roof is Shingles and it is going to have about a 4" circle hole. What is the best way to take care of the hole. I thought maybe cut a piece of metal sheating and cove them up. But is there a better way. It is by the way a 4 x12 pitch roof and trusses if that helps plywood under shingles.


Bigbobdallas is offline   Reply With Quote
Old 11-29-2007, 11:30 AM   #2
Join Date: Jan 2007
Location: Des Moines, IA
Posts: 1,329
Rewards Points: 790

Are you reroofing your house?

If not, what is the harm in the pipe? I would leave it if you are not putting new shingles on. Otherwise, best way would be to cut the extisting sheathing from truss to truss and add a new piece. We have covered smaller holes with flashing, but 4" is large considering a 4/12 pitch will be supporting more weight in snow and water sits on a lower pitch for longer amount of time.


cibula11 is offline   Reply With Quote
Old 11-29-2007, 11:51 AM   #3
Join Date: Jul 2007
Posts: 16
Rewards Points: 10


This one has a leak around it that is the reason
Bigbobdallas is offline   Reply With Quote
Old 11-29-2007, 12:19 PM   #4
Long-Time DIYer
Mike Swearingen's Avatar
Join Date: Mar 2005
Location: On Albemarle Sound In Northeastern NC
Posts: 1,460
Rewards Points: 500

Do you have shingles to patch with to exactly match your existing shingles? If so, you can remove the existing shingles back to past the roof trusses on either side and patch the roof sheathing, roofing felt and shingles.
If not, why don't you just seal around the pipes with black plastic roofing cement until you're ready to re-roof with all new shingles that do match.
That cement is extremely sticky and can be applied in the rain to seal leaks. Wear old clothes, rubber gloves and use a throw-away paint paddle to spread the cement with. You WILL get it on things that you don't want to. LOL
Mike Swearingen is offline   Reply With Quote
Old 11-29-2007, 06:11 PM   #5
Join Date: Jan 2007
Posts: 2,384
Rewards Points: 1,000

Don't use any sheet metal for a patch. Besides the lack of structural support and the future possibility of someone stepping on it some time down the road and collapsing it and/or breaking their ankle, their would be a large sheet metal surface for condensation to collect on and drip into the residence.

Do it with equal thickness plywood or plank boards, which ever you have on it currently, and go from rafter to rafter with the patch. Also, use at least a 2 foot X 2 foot piece minimum for structural stability.

What is that black stuff Mike was talking about? I have not used that on any roof since my old hot tar roofing days.

Ed the Roofer is offline   Reply With Quote
Old 12-01-2007, 11:35 PM   #6
the roofing god's Avatar
Join Date: Aug 2007
Location: Pomona,New York,10970
Posts: 877
Rewards Points: 500
Send a message via MSN to the roofing god

by all means cut in the plywood joist to joist,although wit adequate insulation /ventilation saying that large sheet metal srface ill drip water into the residence is overkill


"If it`s worth doing,It`s worth doing right!!"
the roofing god is offline   Reply With Quote

Thread Tools
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
3 vent pipe through Granite foundation fburke Plumbing 4 11-29-2007 05:47 PM
vent pipe jenry93 Safety 2 09-15-2007 05:41 PM
Heating Oil Pipe Removal Big Bill Plumbing 26 09-17-2006 06:56 PM
Vent Pipe Leak romeguy1 Plumbing 9 12-11-2005 12:08 AM
2 bathroom exhaust fans to one outside vent pipe? CGofMP HVAC 2 03-25-2005 09:45 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1