Originally Posted By: nbhi This post was automatically imported from our archived forum.
At what point should a cricket be installed? Does there have to be a certain amount of pitch on the roof before one should be constructed? Also, how wide should the chimney be before one would be installed?
Originally Posted By: whandley This post was automatically imported from our archived forum.
A center raised metal flashing, designed to divert water off both sides of the chimney or other low roof intersections where water may accumulate. Crickets may be of metal and or a fabric membrane design.
Originally Posted By: lkage This post was automatically imported from our archived forum.
jhagarty wrote:
gschering wrote:
Saddle flashing? I am not familiar with that
Crickets and Saddles are the same thing. There may be varying use of the terms based on Geographic area.
The old carpenter I trained under back in the early 70's called it a hogs back..."dun furgit, Larry, we godda biwd uh hogs back up der." 
-- "I have never met a man so ignorant that I couldn't learn something from him."
Galileo Galilei
Originally Posted By: mboyett This post was automatically imported from our archived forum.
. Chimneys shall be provided with crickets when the dimension parallel to the ridgeline is greater than 30 inches (762 mm) and does not intersect the ridgeline. The intersection of the cricket and the chimney shall be flashed and counterflashed in the same manner as normal roof-chimney intersections. Crickets shall be constucted in compliance with Figure R1001.17 and Table R1001.17.
Table R1001.17
Roof slope.....H (height of cricket)
12-12..........1/2 of chimney width
8-12............1/3 w
6-12............1/4 w
4-12............1/6 w
3-12............1/8 w
Originally Posted By: jhagarty This post was automatically imported from our archived forum.
kmcmahon wrote:
One thing I see often is no crickets behind larger skylights. An important place for bad things to happen.
Especially if you are in an area where you have Snow.  
Originally Posted By: rjudd This post was automatically imported from our archived forum.
SKYLIGHTS!! Ever wonder why a 36" wide chimneys needs a cricket and a skylight does not. Ever wonder why the formula for step flashing chimneys is not applied to skylights? How do you flash something that only protrudes through the roof a few inches is 3 feet wide and made of plastic? There are only two kinds of skylights. Those that are currently leaking and those that soon will be!!!
Originally Posted By: mcyr This post was automatically imported from our archived forum.
Hi. Robert;
Believe it or not as they say, I have seen and installed Skylights that don't leak.
Like everything else, you get what you pay for.
Most generally, skylights will have the proper flashing built into them and the proper instructions from the Manufacturer on how to install it properly.
If that is not followed, yes, it will leak.
Most likely in most areas and local's, it was installed improperly.
Can't inspect what you can't see, so I guess all you can say is that (skylights are prone to leak, and though it is not leaking at the moment of Inspection, will not admit to it's full functionality as a waterproof unit. )
