Vent through roof
I recently moved into an older house that has the flue block sticking up through the top of the chimney brick without any damper or covering. Rain comes in through the opening into the firebox. What is the best type of damper/ covering to use here, the size of the opening is approximately 7" x 12" oval shaped clay pipe and it finishes about 4" above the brick.
Any guidance is appreciated.
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