Who Jackhammers The Slab When Installing Drain? - Plumbing - DIY Home Improvement | DIYChatroom

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing


Thread Tools Display Modes
Old 09-07-2010, 05:06 PM   #1
Join Date: Jan 2008
Location: Connecticut, US
Posts: 259
Rewards Points: 262

Who jackhammers the slab when installing drain?

Would like to construct a new bathroom on the floor above an existing bathroom, almost directly over the existing bathroom, in fact. The house is slab on grade, and the new toilet drain pipe needs to come down through a closet and join the existing drain pipe that runs down through the slab and out to the septic system. I do not want to do the demo myself. Do plumbers normally do the slab demo and patch, or do I need to hire a different contractor for that, and thus involve two trades rather than one?



tpagel is offline   Reply With Quote
Old 09-07-2010, 07:01 PM   #2
TheEplumber's Avatar
Join Date: Jul 2010
Location: North Idaho
Posts: 9,984
Rewards Points: 922

a plumber will do it most times. You may have to do the pour back tho. In fact you may want to because most plumbers aren't conctrete finishers and you can also save money if you do the demo.


TheEplumber is online now   Reply With Quote
The Following User Says Thank You to TheEplumber For This Useful Post:
oh'mike (09-07-2010)
Old 09-08-2010, 07:11 PM   #3
Join Date: Dec 2007
Location: Michigan
Posts: 85
Rewards Points: 75

I would ask the plumber if instead of using a jackhammer if he can saw the concrete. it is a lot nicer to fill when job is complete. Jackhammer will leave a lot of rough edges.
merle is offline   Reply With Quote
Old 09-08-2010, 07:43 PM   #4
HVAC / Plumbing
Join Date: Feb 2009
Posts: 1,801
Rewards Points: 1,000

I use a saw to square the hole. Then jackhammer the center. I have used a sledge hammer
kenmac is offline   Reply With Quote
Old 09-08-2010, 07:57 PM   #5
TheEplumber's Avatar
Join Date: Jul 2010
Location: North Idaho
Posts: 9,984
Rewards Points: 922

If the plumbers don't do the demo, be sure they mark out the trenches prior to demo and hold them to their layout. Also don't allow them to mark out more than needed. If they don't bid the demo or concrete replacement they won't care that you buy an extra yard of mud. So they will probably oversize the demo work.
TheEplumber is online now   Reply With Quote
Old 09-08-2010, 09:27 PM   #6
No Hacks Allowed!
Join Date: Feb 2009
Posts: 30
Rewards Points: 25

If you desire to make a precise hole in the slab as well as produce the least amount of noise (in my opinion) and dust, think about using a contractor that can drill through the slab using a vacuum base concrete core drill.

A cylindrical core bit will make a neat, circular hole through the slab with a minimum of fuss. Either tape a large section of heavy 6-mil plastic to the floor to collect the bit-cooling water, or actively suck up the water with a wet vacuum during the drilling process. The trickle of cooling water on the core bit also eliminates dust.

If your slab is a post-tensioned stressed cable slab:
  1. Be sure to use a proper "metal finder" sensor to find the exact location of any post-tensioned cables buried in the slab. DON'T DRILL THERE!
  2. Be sure to use a contractor that has the proper locating equipment, and knows how to use it.
Some ill trained doofus using a borrowed Garrett metal detector probably can not determine if an electronic "hit" is a length of 1/2” rebar buried deep in your slab <OR> a plastic sleeved stress cable under thousands of pounds of tension. This genius will mark the spot on the slab surface as OKAY to drill, jack hammer, or blast. Be careful. You could be in for an expensive lesson. Pay upfront for the proper usage of time, equipment and personnel instead of possibly compromising the integrity of your slab.

Depending on your specific situation, you may be required to hog out a big ugly hole in the slab anyway to have enough elbow room to install any sewer line connections under the slab far from the edge.

Vacuum Base Concrete Core Drill

Photo of concrete core being lifted out of slab

Good luck!


Last edited by NoHax; 09-09-2010 at 10:15 AM. Reason: syntax
NoHax is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
installing a roof drain -BUR drbracken Roofing/Siding 6 12-02-2010 10:33 AM
Installing basement shower drain atilla137 Plumbing 5 09-03-2009 11:54 AM
Water heater drain pan - can I drain into the washer drain? cjartguy Plumbing 7 04-15-2009 02:34 PM
Installing a drain for a new tub draynes Plumbing 3 04-08-2009 09:33 AM
Main drain water back ups destroyer427 Plumbing 7 04-07-2009 12:58 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1