Yes, I recently had my roof replaced but they did not build a cricket
behind my chimney. I want to build one myself, but am not sure exactly how
I need to measure for it. Any information would be greatly appreciated.
Thank you

dgarrison wrote:
Yes, I recently had my roof replaced but they did not build a cricket
behind my chimney. I want to build one myself, but am not sure exactly how
I need to measure for it. Any information would be greatly appreciated.

Not much to measure. It's as wide as the back of the chimney and the
sides are steep enough to shed water and leaves. A 6/12 pitch is
probably at the lower end for leaves, but more than enough for the
water. Or you could match the pitch of the existing roof it will be
sitting on.

Unfortunately it's not a trivial exercise once the roof is in place.
Cutting into an existing roof and getting the valley flashing right
requires you to open up a good sized working area. Cutting into the
masonry and installing the chimney counterflashing, and getting it
right, is not rocket science, but you must get all of the details
right.

R