Chimney install leak

[GeneralBill]

Recently had my roof replaced. Good thing because half a sheet of plywood was rotted due to the professional chimney install 5 years ago. When they installed the new chimney, it needed bracing, so they bolted a couple rods through the shingles into the roof deck and caulked over the bolt heads. As far as I could tell, the rod ends looked like they were meant to be installed that way. Yet, it also looked like an easy spot for water to find a way in, which for one mount, it did. During the tear-off, the roofers called me up and showed how easily they could dig rotted wet roof decking wood out with a hammer claw.

I asked the roofer's advice and they just did the same as before and also slipped a customized flashing dam underneath the shingle above. Has anyone seen this, or a better way?

I actually like the stove shop and the work they did, but they clearly don't understand roof mounts.

edited for clarity.

 

[GeneralBill]

It could be that no one has a good answer for chimney braces leaking. If so, I would recommend everyone with these braces climb into the attic every few years and check for decking rot!

 

[Oldman47]

I don't know about chimney braces but any device that gets directly screwed/bolted through shingles is an invitation for leaks. Always use some kind of flashing to prevent rain reaching the screw holes and you will be fine. If you are installing on a new roof, place the attachment before adding the row of shingles above the brace and then continue on shingling right over that spot (I am assuming the brace manufacturer is smart enough to leave a piece that runs along the roof line before bending to the bracing part). By having the actual attachment point under a shingle it is more or less self flashing.

 

[GeneralBill]

I am assuming the brace manufacturer is smart enough to leave a piece that runs along the roof line before bending to the bracing part

Nope. The part that is fastened onto the roof is thick, too thick and short to slip under a shingle. There must be a silicon caulk procedure that was not well followed because only one brace leaked.