Thimble through masonry/brick

[Dc191]

Are there any videos on installing the thimble through a brick exterior? I just got done building my hearth pad for my pel pro pp-130. I'm trying to do a little research before I blow a 7" hole in my wall. A friend suggested drilling small holes around a circle and knocking it out then chiseling my way through. I'm not really a big fan of that in fear of knocking the bricks loose. I have a old house built in 1908 with brick exterior and plaster and lath walls. I looked in to renting a core drill rig with a 7" diamond core bit- which seems like my best bet for a clean cut. I also plan on doing a out and up installation. Appreciate any suggestions

 

[Mt Bob]

Being that old, any vibrations may damage surrounding brickwork. I recommend calling a quality "old guy"mason for recommendations.

 

[cecil_archer]

I have a similar setup with sheetrock inside of a brick exterior.
The thimble goes through the sheetrock and butts up against the brick. Then a hole through the brick only big enough for the exhaust pipe to fit.
You don't need the ~7" hole needed for the thimble all the way through the brick.

 

[Dc191]

I have a similar setup with sheetrock inside of a brick exterior.
The thimble goes through the sheetrock and butts up against the brick. Then a hole through the brick only big enough for the exhaust pipe to fit.
You don't need the ~7" hole needed for the thimble all the way through the brick.

So just a thimble on the interior side is used? No need for it on the outside? That sounds easier than boring a 7" hole through brick. Thanks for the input