Don't waste too much time trying to make a round hole to exactly match
the duct, look at the square flange on the outside vent to see what you
should shoot for. You can also chip out the mortar around a brick and
remove it to where you can split it more accurately without having to
bash on the entire wall. Back fill the extra gap with expanding foam and
finish any visible gaps on the outside with a bit of mortar. If you
removed any bricks for cutting, mortar the pieces back in.
I have seen vents sized and shaped to fit a brick size opening. Maybe
they were custom made, but even that would not be too hard to do. Not only
will it save time, but it results will be better looking.
As long as the vent hood has a flange around it to cover the uneven edge
that should work. I did the 6-inch hole for my Jenn-Air's vent that way
using a 3/8" bit in a hammer drill and it didn't even require any
chiseling -- a single whack with a hammer and the center separated
perfectly. But I did drill what seemed like an insane number of holes so
that there was very little material left between them.
On 29 May 2006 08:18:53 -0700, firstname.lastname@example.org wrote:
I havent done this, but I saw on "holmes on homes" they used a rented
impact drill, with a rented drillbit. It was a 4" hole saw(heavily
Might want to check with your rental stores for help.
tom @ www.FreelancingProjects.com
I did this and it worked out perfectly. I simply bought a masonry blade
for my circular saw at Home Depot and used the saw to plunge through
the brick.and make a square. I used a chisel to cleanup the corners and
it fit within the frame of the front rover. Also. I filled the the
boles around the circular vent pipe with insulating foam.
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