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Old 10-17-2011, 07:17 AM   #1
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Removing an 8 inch chimney pipe


I am relocating a wood stove to a different room. The roof has been done recently so I just want to close this hole. I can access the back side of the roof cause of the size of the opening in the living space. If I remove the piping and flashing should I put a piece of wood flush and then support it with a 2x4 and lag it to the joists or I guess what is the easiest way to close in a hole this size?

Asphalt roof
2x8 joists

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Old 10-17-2011, 08:28 AM   #2
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Removing an 8 inch chimney pipe


If it were me I would leave fastening the pipe directly to anything flammable out of the equation.The pipe from a wood stove puts out some decent heat.Unless it is protected.


If I were to relocate a pipe I would use hangers.


The best way IMO is to remove the pipe and relocate it near your stove.


Not a whole lot of labor involved.

1.Seperate the pipe in the attic.


2.Use a nailbar and remove the shingles directly above the pipe flashing.,then beside.,then under the flashing.


3.Remove Pipe/flashing/cap as one.


4.Remove felt.


5.If your decking is 1"x's(Plank) cut the felt and shingles until you find a truss on both sides of the hole.


6.Remove the nails fastening the decking to the truss.I would remove anything that could obstruct your vision or the ability to make a clean cut with your saw while removing the decking.


7.Using a speed square mark a line center to center.


8.Set your saw to the needed depth as not to cut into the truss.


9.Replace the decking


10.Replace felt,shingles etc.


If your decking is plywood do everything up to #6 except cutting a 2'x4' piece of the plywood out by using a chalk line rather than a speed square and mark center to center.


I really like to replace a 4'x4' section but you could get away with a 2'x4' section or whatever the measurement is from center to center. if you use H-Clips.


It really depends on where the hole is in your decking.


Last edited by Roofmaster417; 10-17-2011 at 08:39 AM.
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Old 10-23-2011, 09:18 PM   #3
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Removing an 8 inch chimney pipe


Thanks. What are the steps for the roofing? Just lay the ice and water shield or should it overlap what's there. Also should I use some of that roofing tar or any seeler by the opening just incase its not done perfectly?
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