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-   -   Chimney peak flashing (http://www.diychatroom.com/f9/chimney-peak-flashing-53986/)

richbl 09-28-2009 01:42 PM

Chimney peak flashing
 
Hello,

I'm in the process of roofing an outdoor pizza oven, and have a question concerning peak flashing.

The roof in question is a 12/12 gable roof that will be finished with composite shingles. The pizza oven chimney (round stainless) transits the roof at the peak, so I need to install some galvanized peak flashing.

So my question is this:

For this chimney peak flashing, does the flashing get installed on the sheathing/paper, or does it get installed OVER the shingles?

For slope flashing, it makes more sense to me (under the upper edge of shingles; over the lower run of shingles), but this peak flashing issue is a bit different.

If there are any examples out on the net, please point me to them, as I seem to be coming up empty when searching for this particular case.

Thanks much,

Rich

Tom Struble 09-28-2009 10:19 PM

hmmm.. i think your right, i would flash over the shingles

richbl 09-29-2009 09:12 AM

Quote:

Originally Posted by tomstruble (Post 333865)
hmmm.. i think your right, i would flash over the shingles

For clarity, here's what the flashing looks like (topmost peak flashing):

http://www.icc-rsf.com/c/icc/img_db/chemhi/EF_Thumb.jpg

What I may end up doing is placing the flashing on the sheathing/paper such that the bottom of the bottom of the flashing will overlap shingles, and then shingle right over the flashing. Then seal the shingles around the chimney jack.

I hope this clarifies things a bit.

thanks,

rich

AaronB 09-29-2009 12:38 PM

If they have one to meet your roof pitch, then youre golden.

I would still shingle over the top edges of the flange, and seal the edges in this rare circumstance.

richbl 09-29-2009 01:05 PM

Quote:

Originally Posted by AaronB (Post 334064)
If they have one to meet your roof pitch, then youre golden.

I would still shingle over the top edges of the flange, and seal the edges in this rare circumstance.

I had one made specifically for a 12/12 pitch, so the task at hand is a bit easier.

As to your comment, I'm not sure I understand your suggestion.

Are you saying that you'd seat the flashing on the sheathing/paper and then shingle over the flashing (up to the roof jack)? Or am I misinterpreting your comments?

thanks,

rich

AaronB 09-29-2009 06:23 PM

What would Aaron do? Hmmm

Aaron would lay the underlayment per mfg. specs., shingle up to and under the flashing flange, install said flange with proper coverage, and run the shingles at the sides up to 3/8" from the flashing upstand on top of the flange, and seal the over shingles to the flange IF the flange was less than 6" on the flat all the way around.

That's what Aaron would do. Thanks for asking for my opinion. I like to share.


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