Go Back  DoItYourself.com Community Forums > Interior Improvement Center > Basements, Attics and Crawl Spaces
Reload this Page >

Digging in Basement floor to install sewage basin

Digging in Basement floor to install sewage basin

Reply

  #1  
Old 05-01-19, 09:06 AM
Member
Thread Starter
Join Date: Apr 2019
Location: USA
Posts: 9
Received 0 Votes on 0 Posts
Digging in Basement floor to install sewage basin

Hi,

A contractor is suggesting to dig into the basement floor to install a sewage basin. I'm concerned that digging into the floor can cause water issues. Would love to hear from people that have experience with this.
Is this something to worry about?
 
Sponsored Links
  #2  
Old 05-01-19, 10:24 AM
Group Moderator
Join Date: Mar 2003
Location: NC, USA
Posts: 20,771
Received 184 Votes on 171 Posts
If you have water issues installing a sump will not change it. If the water table gets higher than your basement floor there is a chance you will get water inside regardless of having a sump or not. Every crack and crevice is a possible entry point as is water simply seeping through block walls or water vapor passing through a concrete slab. That said, a sump does not form a perfect waterproof seal to the concrete slab. If the water comes up there is a chance it can emerge into the basement around the sump.

But, if you are adding a bathroom in the basement you don't have many other options. Poo flows downhill so your sump has to be lower than the tub, shower or toilet you are draining. There are tanks that sit on top of the slab and don't require cutting through the floor but it requires that the bathroom be elevated on a platform. The other, more traditional method, is to cut a hole in the floor and install a sump.
 
  #3  
Old 05-01-19, 11:49 AM
Member
Thread Starter
Join Date: Apr 2019
Location: USA
Posts: 9
Received 0 Votes on 0 Posts
I don't have a sump pump in my basement and it is dry. Is it possible that by digging a hole in the floor, I'll puncture some sort of barrier that will allow water to enter or can I assume that if the floor is dry, there isn't water pressure underneath that will start coming up?
 
  #4  
Old 05-02-19, 05:45 AM
Group Moderator
Join Date: Mar 2003
Location: NC, USA
Posts: 20,771
Received 184 Votes on 171 Posts
There is no truly waterproof barrier under a basement floor. At best there might be a vapor barrier which are frequently punctured when the workers walk all over it pouring the floor.
 
  #5  
Old 05-08-19, 03:50 AM
Member
Thread Starter
Join Date: Apr 2019
Location: USA
Posts: 9
Received 0 Votes on 0 Posts
Okay, thank you for all your help!
 
Reply

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


Thread Tools
Search this Thread
Display Modes
 
Ask a Question
Question Title:
Description:
Your question will be posted in: