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-   -   New Member here, I have a concern about new Chimney flashing (http://www.diychatroom.com/f9/new-member-here-i-have-concern-about-new-chimney-flashing-169007/)

Peter683 01-13-2013 03:09 PM

New Member here, I have a concern about new Chimney flashing
 
3 Attachment(s)
We had some roof damage from Hurricane Sandy and it necessitated replacement of the shingles on one half of the roof and new flashing around the chimney. Shortly after this was done we had a leak from the chimney inside one of the bedrooms. This was fixed with sealant by the contractor who resealed the flashing. It is now leaking again and we can see daylight when inside the attic looking up the chimney side. Does this flashing look right as it just looks very odd?? Searching online I can't find anything like it and when questioning the roofers he said it was a new type??:(

joecaption 01-13-2013 03:34 PM

It should have looked something like this.
http://www.bing.com/images/search?q=...E41F&first=160

DO you know if they also install step flashing under what your seeing?
I just hate to see a chimmney that close to the peak of a roof, harder to seal it on the high side.

Peter683 01-13-2013 03:40 PM

Joe, thanks for the fast reply. I don't think they installed a step flashing under it as I remember seeing the bare chimney as they were installing the flashing.. I checked other homes around the area and noone has roof flashing like this. So am I correct in what you say as well, in that this was totally incorrect?

joecaption 01-13-2013 03:45 PM

In my opion it should have looked someting like this before the other flashing went on.
http://www.bing.com/images/search?q=...+step+flashing
If you keep an eye on your post I'm sure a few full time roofers will also give you there opion.

Peter683 01-13-2013 04:05 PM

Thanks Joe, I have bookmarked the site..

jagans 01-13-2013 04:29 PM

Totally Wrong, as usual. Check back through my posts I posted a SMACNA Illustration of how this is done.

You need an apron on the bottom, Individual base tins up the side, commonly known as step flashing, and seperate counter flashing. You have to cut into the mortar joint wood block and hammer in the CF, lead wedge it, and seal it.

last of all you need a chimney back or a cricket behind the chimney, depending on size.

That guy you got is not a roofer, he's a shingle butcher.

Peter683 01-13-2013 04:34 PM

Thanks Jagan , forgive me if I don't get the terminology correct but I think we are not able to have a chimney back as it is so close to the peak?

joecaption 01-13-2013 04:40 PM

It's called a cricket and yes it could have been done, even if it was done with metal.

Peter683 01-13-2013 04:42 PM

Thanks, something to keep in mind when they come to inspect it.. They won't know what hit them!!

Roofmaster417 01-13-2013 05:03 PM

I can tell you that its not a new technique type of installation.We have those types of installations here in Missouri.They are the type I like to replace with a proper counter flashing installation.

Give a guy a pair of crimpers,2-1x8"'s (A.k.a "Poor mans brake",a couple tubes of goo and a caulk gun then he thinks he is a metal man. :mad:

Peter683 01-13-2013 05:05 PM

Thanks Roofmaster, it certainly looked very poor and it has ben bugging me ever since....

OldNBroken 01-13-2013 05:06 PM

3 Attachment(s)
A few examples of the two separate pieces involved in flashing a chimney. Sorry they are not from the same jobs.

Flashings are supposed to be interwoven into the roofing system in order to seal up the roof deck. Counterflashing's only job is to cover the bare top of the flashing to prevent airborne moisture from getting in at the top of the flashing.

Whoever did yours has no clue what he's doing.

Old-school would be lead stepped into the shingles, run up the chimney and cut into the mortar line. I think he was thinking that's what he was doing. Kinda missed the stepping in part though. If there is nothing behind that it is going to mean issues very quickly.

OldNBroken 01-13-2013 05:12 PM

actually from the looks of the second two pictures it looks like there may be step flashing on the sides. Wouldn't know until you look behind it though.

Peter683 01-13-2013 05:17 PM

Im'e not sure... I remember taking a look at the progress and the large metal was being prepped for installation and i could see brick on the chimney right down to the roof..

The wrapping on the shingles also state that the flashing should go on first then the shingles, does this sound correct???

PatChap 01-13-2013 05:53 PM

Very common style here, surface mount flashing with a 2" kick onto the roof, most idiots nail it down to the roof, right through the shingles. Surface mount is OK, ofcourse cutting it into the brick is superior but it does work. There Is most likely steps underneath. I would bet your in southern Ontario judging by the style?.

Done wrong either style with leak, the drawback to surface mount flashing is the complete reliance on caulk to seal the brick to metal intersection. The face nails in the side are guaranteed future leaks, as well.


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