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-   -   Caulk vs. embedding flashing in mortar (http://www.diychatroom.com/f9/caulk-vs-embedding-flashing-mortar-118867/)

bunburryist 10-01-2011 01:20 PM

Caulk vs. embedding flashing in mortar
 
Everywhere I read it says to embed the cap flashing in the mortar. Our roofing guys want to just caulk it to the chimney, saying that putting grooves in the mortar will weaken it. I would think that, if done by someone who knows what they are doing the embedding way would be the best. Any thoughts?

sixeightten 10-01-2011 01:26 PM

You picked a bad roofer. Was he the cheapest?

Slyfox 10-01-2011 01:39 PM

The only way cutting into the chimney would weaken it is if the cut were to deep or to close to the outside corners.
Caulking alone is not a proper method to install counter flashing's.
Face nailing the flashing and the use of caulking is acceptable.

The cutting into the brick method dumbafies the method so it is less likely to be a problem.

Windows on Wash 10-01-2011 01:45 PM

Quote:

Originally Posted by Slyfox (Post 739566)
The only way cutting into the chimney would weaken it is if the cut were to deep or to close to the outside corners.
Caulking alone is not a proper method to install counter flashing's.
Face nailing the flashing and the use of caulking is acceptable.

The cutting into the brick method dumbafies the method so it is less likely to be a problem.

+1

agreed on all accounts.

rossfingal 10-02-2011 12:39 PM

Just to throw this out there.
Step-flashing fastened to the chimney -
Mortar cuts -
Counter-flashing, "pop riveted " to the step-flashing -
(Seen this)
Sealed with the appropriate sealant.
Seems to work!?
Mortar it? - depends on the condition of the brick - depends on the thickness of the mortar
joints - depends on the mortar... etc.

rossfingal

framingrailman 10-02-2011 04:19 PM

if your roofer told you that... find a new roofer

rossfingal 10-02-2011 06:58 PM

No - nobody told me that -
I've been up on roofs; and that's what I've seen - numerous times.
Just wondering if it "flies or dies"?
I don't know who roofed it, and no one told me.
OK?

rossfingal

framingrailman 10-02-2011 07:23 PM

Quote:

Originally Posted by framingrailman (Post 740507)
if your roofer told you that... find a new roofer

I was speaking to original post OK!


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