Roof leak or Leaking B vent flue pipe?

This homeowner noticed some water gathering somewhere around his furnace and thought it might have been condensation or something going wrong with his furnace. He called a furnace guy out to inspect to see if there was a furnace issue. The HVAC guy said everything with the furnace was good but it was something to do on the roof dripping down the furnace pipe. Everything with the roof seemed to be good, just water splattering up under the rain collar running back down a gap between the pipe and flashing.

[jamesharris]

As soon as it stops raining I'll be up on the roof to see if this is my problem. Great video, short and straight to the point!

[AfricanSouthernCross]

Excellent video….this was exactly my issue and your advice is pure brilliant, thanks man !

[AdmrlSpeedy]

Glad I found this, this was exactly my issue.

[xhali]

Your channel is awesome man! Thanks for all you do!

[shelleycharlesworth]

My 14 yr old house had water coming through in master bathroom roof. I have a pass through fireplace in master bedrm/master bath. Last January. I had roofing company come and see - they said I needed ‘debris’ cleaned and some flashings replaced. And some tiles near both chimneys were cut. Cost was $3, 200. They cleaned all the debris from the valleys and cut some of the tiles back away from chimneys.This was Jan 2023. Here is what they wrote on my invoice:

“ An inspection of the roof was undergone to determine what maintenance was required.
We found the tiles behind the two chimneys to be too close to the chimneys allowing debris to build-up which caused the water to overflow. This was repaired by cutting the tiles by 6" to allow the water to properly flow.
Secondly, we found the valley metal ends were on top of the tile and this causes the water to spill over the valley and run allow the underlayment, which can cause the underlayment to prematurely deteriorate. This issue was repaired by cutting back the valley metal ends and installing a lead extension on the five valleys.
Lastly, we found the valleys and cricket to have debris. We underwent a clean-up, which will allow the water to properly flow…”

We had a lot of rain in Feb and March and even some in August. All seemed, but to my shock, last week, I noticed a stain on ceiling of a bedroom not anywhere near where the January leak was. But this bedroom backs up to living room in area where there is another fireplace/chimney. I don't know when this happened. I seldom go in that bedroom and I seldom look at my ceilings. But water must have gotten in somehow. . I called the roofing company and left a message. Waiting for them so call me back.
I got a ladder and went up to feel the stain and there is no wetness or puffiness on the ceiling.
November is a month we often get rain. Of course if we get rain before the roofer calls me back I will be sure at watch the ceiling where that stain is. Is it possible that
there was an unnoticed issue in this room but no problem NOW since the roofer worked on BOTH chimneys?

[Rotaris]

Excellent videos, more of these please!

[Smokey-mtye]

Great video. Thank you so much. I believe I just fixed the leak on my roof after watching this.

[traviswhitney]

we are getting water in between the 2 pipes, leaking down onto the top of the hot water heater. Went onto the roof but all looks good. Storm collar is down and caulked, etc. It was a hard storm so maybe it was wind-blown rain that got under the cap and traveled down the outside of the inside pipe? Maybe add some sheet metal to keep rain from getting up underneath the cap?

[mikenicholson]

Just a request could you when you have time do a video on bad ventaltion issues and how to spot bad ventaltion problems by looking at your shingles. Do the shingles roll up or under and the effects of the life to the shingle with bad ventaltion. Thanks great info videos.

[mtn-endeavors]

Guys use Henry roof patch comes in a caulking tube

[joycebudd]

Hi, Brian! I wish you could have shown me how to caulk the underside. I have the same problem but my gap is bigger. Can you put A LOT of caulk underneath or does something else have to be done to reposition everything? Your videos are great/very informative!

[TheCodesterr]

Thank you! Good timing, been trying to find the leak on mine… this might be it. What calk do you use?

[vincentkosik]

Mines leaking now will use your video...thought it might be the shingles maybe not?

[mrsbrunswick]

Help! our insurance wont cover:


Contractor Note
Located water leak coming from flue on rooftop penetration flue is rusted and cracked with a broken flue cap causing water to run down while its raining into the furnace and coil also flue is not up to code or proper material ~ what can we use? Please thanks

[davidbagley]

What kind of caulk.. the insulated pipe gets pretty warm

[bryangryder]

There is a reason there is a storm collar around gas vent pipes. You should absolutely never caulk them shut because it is a vent for possible gas leaks. Big time no-no!

[mattjones]

What kind of caulk do use for those collars? Can you suggest one that can be purchased at big home improvement stores.

[jeffdanielspoker]

How much should I expect a roofer to charge for this repair ?

[lakerfan]

Thanks for the video. What kind of caulk do you use? should be heat resistant since the vent can get hot?

[squirrelmaster]

i would give it a thumbs up but you didnt say what you used to fix : / now im sad