Floor Insulation   Insulation Problems   


Insulation Problems

Home > Insulation > Insulation Problems

I’ve heard about crawl space encapsulation, am I better off sealing the vents?

I’ve heard about crawl space encapsulation. Am I better off sealing the vents to my crawl with a rigid foam board or insulating between my floor joists and keeping the space ventilated?

If you have or want a non ventilated sealed crawl space, full encapsulation, then you probably don’t need to add floor insulation. Traditionally, crawl spaces have been vented to prevent problems with moisture. However there are a growing number of building professionals that recognize the benefits of a moisture controlled unventilated crawl space.

There are two main reasons for this line of thinking:
  • Ventilation in the winter makes it difficult to keep crawl spaces warm.

  • Warm, moist air brought into the crawl space through foundation vents in the summer is often unable to dehumidify a crawl space. In fact, this moist outdoor air can lead to increased moisture levels in the crawl space. This information is from US Dept of Energy website.

For a more complete discussion on encapsulated crawl spaces please see our section on crawl spaces in this website.

Back to the Insulation page

Share This
Contact Us



Share This | Contact Us

I’ve heard about crawl space encapsulation, am I better off sealing the vents? | What are the benefits of adding floor insulation or replacing old ineffective insulation? |
Floor Insulation   Insulation Problems   


Let Us Help You Find some information with
our one-word search:



Crawlspace Solutions


Crawlspace Solutions
Doug Holsinger, (253)691-9239

Contact Us


Contact Us

View our testimonials


Crawl Space Solutions




Copyright 2014
Website Design by Dragonwyck Web Design L.L.C.
Dragonwyck Web Design
If you have questions or comments about this website,
please contact the Webmaster


eXTReMe Tracker