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Old 09-02-2006, 12:33 PM
babco babco is offline
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Default Cricket layout

anyone have the correct lay out procedure for a chimney ckicket?
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Old 09-04-2006, 08:09 PM
bordontn bordontn is offline
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Should be the same pitch as the roof..from the outside edge of chimney where roof meets it, strike a line same pitch as roof on chimney on both sides..where they cross is center..that is base length of your lay-out..
from the center mark measure a level line to roof.thats your ridge length
or height of your triangle.connect those two with a line. that's the hypotenuse of a triangle or the part that rides up the roof/valley..
hard to explain..hpe you get it...
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Old 09-10-2006, 11:19 AM
SteveB SteveB is offline
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Default Cricket layout-- got ACAD?

Have you got AutoCAD, or the viewer?
I drew one up in 3d a few years back for a high school career fair near my place.
Let me know.
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Old 10-31-2006, 06:25 PM
flasher flasher is offline
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You must determine the ridge length of the cricket by choosing the slope for the cricket and multiply that number by 1/2 the width of the chimney. Then divide that result by 12. Multiply the dividend by 12 and divide that result by the roof slope number. Ex. 30" chimney, 5:12 cricket, 9:12 roof. Cricket height equals 15 times 5, divided by 12= 6.25. Ridge length equals 6.25 X 12 divided by 9 = 8.334. Cricket slope along back side of chimney = the square root of 6.25 squared + 15 squared = 16.25. To lay out a cricket, scribe a line parallel to the edge of your metal 32.5" long. Scribe a line perpendicular to this line at its halfway point 8.334" high. Scribe lines connecting the ends of these two lines to create the two right triangles that will be the two sides of your cricket.
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Old 09-01-2016, 09:34 PM
Falconexe Falconexe is offline
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Default Cricket layout

I know how to layout a cricket. What need to know the allowance to flash to the roof ( 4" or 6"). To flash into chimney cutting a groove into brick to allow for a 3/4 flange to enter into it and mortaring it in?
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Old 09-02-2016, 06:11 AM
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Stickman Stickman is offline
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My roofing contractors always want 10 - 12" on the roof.
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Old 09-17-2016, 01:09 PM
MattM MattM is offline
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12" is typical up roofside. 4" minimum against walls. Why not step flashing hid by counter flashing, so it's double sealed?

General rule of thumb, don't cut into somebody's brick unless it's their idea
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Old 09-26-2016, 07:49 AM
cactassdupree cactassdupree is offline
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Yes use the brick joint.. step flash it.
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