What is this white powder


  #1  
Old 12-20-20, 12:05 PM
M
Member
Thread Starter
Join Date: Nov 2008
Location: Mid South USA
Posts: 241
Received 1 Upvote on 1 Post
What is this white powder

In the picture below, is the incoming water connection for my house. (House built late 2018, purch Jan 2019)
What I'm wondering about is that white stuff around the cement repair where the pipe was brought in. When I rub it, the white stuff comes off on my hand, a dry powder. Does not smell like mold, so I'm wondering if it's some soft of seepage? Anyone else ever seen this, and if so, what is it? AND more importantly, do I need to worry about it or repair it now?


 
  #2  
Old 12-20-20, 12:23 PM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Posts: 26,190
Received 1,703 Upvotes on 1,527 Posts
Efflorescense. Its a mineral (salt) that is deposited when wet concrete dries. Its largely harmless. You can scrub it off with a brush and a hot water/vinegar solution, but given long enough, it will likely reappear. It indicates the outside of your wall is not completely waterproofed... not surprising since the water supply is a penetration.
 
  #3  
Old 12-20-20, 01:30 PM
M
Member
Thread Starter
Join Date: Nov 2008
Location: Mid South USA
Posts: 241
Received 1 Upvote on 1 Post
Is there anything I can do to fix this? Should I even worry about it? is this a problem left by the builder or something they would not be responsible for? I have a 2-10 builder's warranty still in effect, so I can contact them if they would cover it. What would they have to do, dig out the grass and coat the outsides with something?
Wow, that's lot of questions. LOL
 
  #4  
Old 12-20-20, 01:36 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 62,035
Received 3,415 Upvotes on 3,063 Posts
In order to seal that 100% it would need to be done from the outside.
 
  #5  
Old 12-30-20, 09:55 AM
M
Member
Thread Starter
Join Date: Nov 2008
Location: Mid South USA
Posts: 241
Received 1 Upvote on 1 Post
Agreed, but it still begs the question...Should I worry about fixing this?
 
  #6  
Old 12-30-20, 10:35 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 62,035
Received 3,415 Upvotes on 3,063 Posts
I wouldn't worry about.
If you wanted to try something you could wash the area with warm water, white vinegar
and a scrub brush. Let it dry thoroughly and paint with a masonry paint.

Make sure there isn't excessive water running on the ground outside above that penetration.
 
 

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