I'm trying to put a fan into a 12-inch thick brick wall. Diameter is
about 8 inches. Naturally I don't have an 8 inch masonry bit (and I
wouldn't like to pay the cost) so the next best thing is to cut
through enough bricks to make a squarish hole though which the fan
will fit. But that leaves small gaps on each side which I'd like to
fill in with mortar. I should also mention that I can only get to the
inside; the fan (really the vent part) is lowered from a higher floor
using a string duct-taped in place. When it's where I want it one
strong tug and it's free. So I have to push the mortar in from the
inside and it's a pain in the butt. Push as far as possible using
hands and then use a dowel to push it all the way and hopefully
Well there's actually a miniature tool that I could use to do the job.
You know when you have a filling at the dentist: he does his drilling
and then uses a thing that looks like a tube with a piston inside to
place the amalgam in the cavity. He then tamps the amalgam down with
Upsize that tube with a piston to 1/2 inch (or maybe have a range of
sizes from 1/2 to 2 inches), pack it with mortar and then push the
piston home to place the mortar deep into the hole. Now where can I
get such a tool?
On Aug 31, 1:24 am, email@example.com wrote:
On the off chance the OP is not a troll, the OP should learn how to
use cold chisels to properly cut through the concrete block in order
to create the desired shape and size of opening needed...
Yet another fabulous example of someone making a mountain out
of a mole hill...
Why make a round hole for something in a concrete wall when *I*
don't want to pay for someone with the correct size concrete
hole saw to come out and make the cut... Surely there is no other
way to make a round hole in a concrete block wall other than using
an mighty expensive drill bit... Then let me concoct the most
"rube goldberg-esque" manner possible to pack mortar into the
gaps *I* never should have created in the first place...
when the cut from inside is nearly thru the bricks outside will likely
spall falling outward..... OP needs exterior access.
better to install just a exhaust outlet with the actual fan somehere
else indoors easy to service
So... They cost money don't they? More than a cold chisel,
mini-sledge, ladder and myself and, I would guess, my rube-goldberg
Same as I do with the other fans: remove the inside grill, unscrew the
fan (it fits in the sleeve) and replace as necessary. The sleeve and
the flap generally don't go wrong but if they were to I'd cut them out
from the inside and replace.
I defy _you_ to use cold chisels and make a neat hole through an
existing wall either brick or block.
As for the OP. Without a hole saw you are going to come out with one
ugly, ragged, oversized hole.
That makes it "sort of" round. There will be a serrated or scalloped edge
to it. Varying with the bit diameter, the hole can easily be too large or
too small depending on where you place the tip of the bit when you drill.
Not to mention the bit must be held very straight or the hole on the
opposite side will be a mess.
It is probably one of the better methods, but still has a lot of potential
I tried that method going through the "cavity" section of a block
wall. Still came out with a very rough hole and way oversize. That
was with a 1/2" homeowner "hammer drill". I'll never try that again.
It may be possible by renting a hammer drill with both drill and
chisel bits though.
OP hasn't said if his wall is solid brick, concrete block or what.
He did say brick I know but unless it is a very old house it won't be
soldi brick, more like a brick facade.
Harry, first line of my original post:
"I'm trying to put a fan into a 12-inch thick brick wall. ..."
The building is about 110 years old and when I say 12-inch thick brick
wall" I mean solid brick. No cavities. I believe there are 3 layers
although I could be wrong about that. Inside the outside brick wall
there are furring strips and then lath and plaster. Sometimes a layer
of sheetrock over them or sometimes lath and sheetrock or sometimes
just sheetrock depending on how I can deal with the door and window
Its pretty easy to do. You just chop away anything that does not look like
Truth is, the finish on the statue is absolutely amazing, as is the detail.
It is made from Carrara marble. The marble contains many microscopic holes
and it may help in sculpting.
On Sept 27 I'll be returning to Galleria Dell'Accademia . (already bought
the tickets) to admire not only David but a few other works by Michelangelo.
It is incredible to see close up.
That is exactly how Michelangelo explained what he did. He was just
revealing the statue that he already saw within. Of course that was
Interesting bit of Italian political trivia from Wikipedia:
""David is a masterpiece of Renaissance sculpture created between 1501
and 1504, by the Italian artist Michelangelo. It is a 5.17 metre (17
foot) marble statue of a standing male nude. The statue represents
the Biblical hero David, a favoured subject in the art of Florence.
Originally commissioned as one of a series of statues of prophets to
be positioned along the roofline of the east end of Florence
Cathedral, the statue was instead placed in a public square, outside
the Palazzo della Signoria, the seat of civic government in Florence,
where it was unveiled on 8 September 1504.
******Because of the nature of the hero that it represented, it soon
came to symbolize the defense of civil liberties embodied in the
Florentine Republic, an independent city-state threatened on all sides
by more powerful rival states and by the hegemony of the Medici
family. The eyes of David, with a warning glare, were turned towards
The statue was moved to the Accademia Gallery in Florence in 1873,
and later replaced at the original location by a replica.""
Sigh! Wish I could get back to Firenze to behold the Davide again.
And to Rome to see the ceiling at the Sistina, which has been cleaned
since last I lived there, and is supposed to be INCREDIBLE with the
gunk of centuries removed...
So many places...so little time...
PVC pipe and a dowel. If dowel is too big - or you are using a big diameter
of pipe - whittle down a piece of wood. Good luck with packing mortar into
a 1/2" diameter tube. There are also grout bags, look like a cake icing
bag. I bought one once, tried it once, threw it away.
I think your nym is appropriate.
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