Basement Wall Frost

Reply

  #1  
Old 01-16-17, 05:00 PM
S
Member
Thread Starter
Join Date: Jun 2012
Location: usa
Posts: 34
Received 0 Votes on 0 Posts
Basement Wall Frost

I happen to pull a section of the insulation back from the foundation.
Noticed toward top of the wall, there was frost that formed on wall.
Its also wrapped with plastic. Not sure how many other spots there are.
I live in Central Illinois Temp at present time was in the low 20s.
What is the cause? Normal? Appreciate, Your comments.
 
Sponsored Links
  #2  
Old 01-16-17, 05:36 PM
chandler's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Dec 2005
Location: USA
Posts: 39,965
Received 6 Votes on 6 Posts
Pictures would help. http://www.doityourself.com/forum/el...your-post.html

How tall is the foundation? Is there a sill? Is there a sill gasket in place? Is there insulation in the floor joist/rim bays?
 
  #3  
Old 01-16-17, 06:12 PM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Location: USA
Posts: 26,222
Received 722 Votes on 668 Posts
The frost is from warm moist air getting through the insulation. If the kraft paper or vapor barrier is not 100% air sealed, that means warm moist air can get to the cold block. When it does, it frosts up. So basically the frost is proof that the area wasn't sealed up very well. Also, normally insulation gets covered with drywall, which is also an air barrier once it gets taped. So no drywall makes it that much more likely that it's going to frost up.

Maybe pictures will tell us more. Like maybe the basement walls have no fire blocking / air sealing behind the top plate where the plate meets the floor joists.
 
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
 
Ask a Question
Question Title:
Description:
Your question will be posted in: