I'm in the middle of renovating a balloon-framed house from the 1890's. The house is currently gutted. It originally had a standing-seam metal roof that was penetrated by a central chimney. At some point a membrane roof was installed over the old metal roof.
The chimney has not been used for a long time, and the (four) fireplaces have been cemented over, except for a stovepipe hole in each one. The chimney was last used to vent combustion gases from kerosene heaters, so I imagine it's pretty dirty inside.
Since the fireplaces are not useable, and the chimney has always been a source of moisture problems in the house, and I'm about to install a whole new roof, I was thinking it would be a good idea to knock the chimney down below the roofline, and simply roof over it.
Once I got the chimney below the roofline, I would seal up the top of the chimney with masonry tiles, and I would seal up the fireplaces with cement.
Is this the proper way to do such a thing?