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Cutting sump pump hole in concrete floor.

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Cutting sump pump hole in concrete floor. BETA-2K 09-11-2006
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Posted by BETA-2K on September 11, 2006, 3:12 pm
I need to cut a hole in a basement concrete floor in a house that I own so I
can put in a sump pump.

I know how to do all of the sump pump stuff, but I'm not sure if there are
any tricks to cutting the hole in the concrete. The concrete seems *very*
hard (it sort seems like it's a finer texture and much harder to chip at or
break than most concrete). I have tried drilling into this concrete in the
past with a concrete drill bit and it seemed to go nowhere.

The main thing I want to avoid is creating a crack in the concrete while
chipping or cutting out the opening. So, I'm wondering if I could buy some
kind of one-time-use circular saw blade and cut grooves around the perimeter
of the hole where the concrete would break/crack instead of the
breaks/cracks extending outward past the opening.

I know this is somewhat vague, but any thoughts, suggestions, or ideas would
certainly be appreciated.



Posted by Speedy Jim on September 11, 2006, 3:27 pm
BETA-2K wrote:

> I need to cut a hole in a basement concrete floor in a house that I own so I
> can put in a sump pump.
>
> I know how to do all of the sump pump stuff, but I'm not sure if there are
> any tricks to cutting the hole in the concrete. The concrete seems *very*
> hard (it sort seems like it's a finer texture and much harder to chip at or
> break than most concrete). I have tried drilling into this concrete in the
> past with a concrete drill bit and it seemed to go nowhere.
>
> The main thing I want to avoid is creating a crack in the concrete while
> chipping or cutting out the opening. So, I'm wondering if I could buy some
> kind of one-time-use circular saw blade and cut grooves around the perimeter
> of the hole where the concrete would break/crack instead of the
> breaks/cracks extending outward past the opening.
>
> I know this is somewhat vague, but any thoughts, suggestions, or ideas would
> certainly be appreciated.
>
>

If you use a saw dry, you will have a house full of dust.

Rent a hammer drill instead and swiss-cheese the perimeter,
then break out.

Posted by BETA-2K on September 11, 2006, 5:01 pm
>
> Rent a hammer drill instead and swiss-cheese the perimeter,
> then break out.

Thanks. That might be an option. I'll check it out when I am at the rental
placing checking out the other idea (about renting "a concrete hole saws
like those use for installing below-grade safes".).



Posted by HeyBub on September 11, 2006, 4:29 pm
BETA-2K wrote:
> I need to cut a hole in a basement concrete floor in a house that I
> own so I can put in a sump pump.
>
> I know how to do all of the sump pump stuff, but I'm not sure if
> there are any tricks to cutting the hole in the concrete. The
> concrete seems *very* hard (it sort seems like it's a finer texture
> and much harder to chip at or break than most concrete). I have
> tried drilling into this concrete in the past with a concrete drill
> bit and it seemed to go nowhere.
> The main thing I want to avoid is creating a crack in the concrete
> while chipping or cutting out the opening. So, I'm wondering if I
> could buy some kind of one-time-use circular saw blade and cut
> grooves around the perimeter of the hole where the concrete would
> break/crack instead of the breaks/cracks extending outward past the
> opening.
> I know this is somewhat vague, but any thoughts, suggestions, or
> ideas would certainly be appreciated.

You can rent concrete hole saws like those use for installing below-grade
safes.



Posted by BETA-2K on September 11, 2006, 5:02 pm
>
> You can rent concrete hole saws like those use for installing below-grade
> safes.

I didn't knew there was such a thing. I'll check it out.



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