Go Back  DoItYourself.com Community Forums > Interior Improvement Center > Insulation, Radiant and Vapor Barriers
Reload this Page >

encapsulated batt vs. normal batt in moisture-laden crawl

encapsulated batt vs. normal batt in moisture-laden crawl

Reply

  #1  
Old 07-29-11, 12:45 AM
dmn
dmn is offline
Member
Thread Starter
Join Date: Apr 2007
Location: United States of America
Posts: 45
encapsulated batt vs. normal batt in moisture-laden crawl

The scenario is an unconditioned crawl with insulation between the floor joists rather than at the foundation, clay floor in crawl without vapor barrier, and significant humidity. Zone 6 climate. The foundation is an old rubble foundation. Have had problems with ground hogs and plugged up holes that were probably supplying ventilation to the crawl, this is probably the reason for the increase in moisture. The insulation was installed Kraft down and has gotten damp and sags, so needs replacement.
Would encapsulated insulation have any advantages over normal kraft batts and a vapor barrier on the ground in this situation, or staple up permeable wrap to the bottoms of the floor joists with the normal batts? If I have a dehumidifier running down there and the foundation is not completely air tight, should any of those protect the floor above from moisture? Might it be worth it to keep trying to block out groundhogs without blocking ventilation (they chew through chickenwire)?
 
Sponsored Links
  #2  
Old 07-29-11, 03:30 AM
chandler's Avatar
Banned. Rule And/Or Policy Violation
Join Date: Dec 2005
Location: USA
Posts: 39,968
Insulation is the least of your worries. You need to install a vapor barrier on the clay floor and extend it to the sill. After a period of dehumidification and ground hog plinking you may be in a position to reinsulate the joisting. Vapor barrier down was the wrong way to install it. The vapor barrier always goes to the living side. The encapsulated insulation is easy to install (no itch), but it will need the support wires to keep it in position. Do you have any foundation vents?
 
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