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Old 09-05-2010, 12:04 PM   #1
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Cricket ?


We have 28" wide by 6' chimney located at the gable side of the house (starting 4 ft below the ridge). Pitch is 6/12, shingles. Overhang is 2ft (about the size of the chimney) and there is a rafter (subfascia) with the fascia going alongside the chimney that has rotted (over many years).

My question is: Is it a good idea to have a little cricket in this scenario to divert the water ? And with cricket is there a concern that the diverted water then will run down the fascia (of course there a little pieces of shingles there). The flashing / counterflashing will be aluminum.

One option I was considering was a cricket with uneven sides (e.g. 20" and 8") so that not as much water would flow down the fascia. Is that done ?

It is Midwest, so lots of snow.

Thanks in advance.

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Old 09-05-2010, 01:45 PM   #2
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Cricket ?


how old is the house?,i don't think a ''cricket'' is ever a bad idea...just it isn't always needed,typically you would use one with any chimney over 2' wide

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Old 09-05-2010, 04:02 PM   #3
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Cricket ?


House is about 45 yrs. old. Any opinions on "uneven" sides cricket (so that most of the water would flow to the roof side, not gable side) ?
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Old 09-05-2010, 04:11 PM   #4
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House is about 45 yrs. old. Any opinions on "uneven" sides cricket (so that most of the water would flow to the roof side, not gable side) ?
What you're proposing is a good idea. The only down sides are the appearance from the gable side and the fact you're using aluminum. You're likely going to be creating some joints that you'll have to rely on caulk to seal using aluminum. I'd look into a material you can solder.
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Old 09-05-2010, 08:07 PM   #5
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Cricket ?


No cricket. Just box-fold the gable side, flush with the edge shingles. Tinner's wing should be at least 2" from (past) the corner that will allow the water out.
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Old 09-06-2010, 05:25 AM   #6
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Cricket ?


Tinner, would what you suggest be possible to do with aluminum ?
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Old 09-06-2010, 05:45 AM   #7
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Cricket ?


Box fold is self explanatory.

And tinner's wing, along with cutting the last step to fit the pan.
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Cricket ?-box-folding-flashing-8-.jpg   Cricket ?-chimney-job-12-.jpg   Cricket ?-chimney-job-7-.jpg  
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Old 09-06-2010, 06:16 AM   #8
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Tinner, would what you suggest be possible to do with aluminum ?
Yes, using aluminum is ok.

The method Tinner explained is much better than your cricket idea, IMO.
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Old 09-06-2010, 06:25 AM   #9
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Yes, using aluminum is ok.
Thanks Steve! I got involved with the details and forgot to say Aluminum was OK.
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Old 09-06-2010, 06:28 AM   #10
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Cricket ?


The box-fold MUST be turned UP the roof! Not sideways!
And the top of it must be sealed. I do it so one side or the other has more metal then the other, and fold the top over to close it. Some caulk or gutter sealed can be used at the fold to prevent water droplets from freezing inside the fold.
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Old 09-06-2010, 07:34 PM   #11
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Cricket ?


If I did not mentioned this before, the total width available on the "rake" (outside) side of the chimney is about 5 inches: (1" gap to rafter + 1.5" rafter + 1" fascia (1x10 cedar) + 1"trim on top of fascia (1x3 cedar) + 0.5" shingle overhang). That should not make any difference here, correct ?

You don't think I need any special way of turning "half" of the water (4ft down the ridge worth times 2ft. wide) away from trying to get through 5" - 2" (for tinner's wings) = 3" left on top of shingles ?

I found this
http://copper-by-design.com/cc/cp/im/Fenley35.jpg

to deal with similar setup, but it seems complicated.

Thanks so much for your help.

Last edited by datadriven; 09-06-2010 at 07:36 PM.
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Old 09-06-2010, 08:38 PM   #12
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Cricket ?


You could get that complicated if you want. Not necessary though.

Standard tinner's wing runs about 6-8" past the corner, then modifed as shown to have the fold about 2" from the corner.
On the rake side, run the last step flashing about 1" above the brick corner, and cut as shown above to fit the back pan. Box fold it.

Hope this helps too. http://www.albertsroofing.com/Chimney%20Repair.htm

Don't over-think it. You're talking about 8 sq. ft. of area, at the ridge. Unless the local RFD is spraying water there, you're not going to have any volumn to speak of.

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