I am wondering if building experts have an opinion in the correct ordering of vapor and air barrier for a small 1 story house in Berkeley CA. We are planning a DER/Passive house retrofit and are figuring out where to locate the vapor and air barrier. One proposal is vapor barrier (let's say a good quality membrane) on the outside, keeps the moisture out and allows the house to dry out to the outside. In this setup, there is a continuous air barrier (lets say OSB with sufficient taping) on the inside, which helps to make the house quite airtight. In the middle would be loads of insulation. What are the issues with this setup? How can it be improved? Does this ordering make sense for Berkeley's climate. 

Thank you.

Views: 73

Reply to This

Replies to This Discussion

Just asking questions and seeing what sticks is a poor way to obtain information. You should begin by reading the book linked below. It is used by many BPI and HERS trainers nationwide. It is a good overall introduction to many fundamental ideas. I would think it beneficial to your quest for information and there are many breadcrumb trails to follow as you read this book

Residential Energy By Dorsi Krigger http://www.srmi.biz/team-saturn/principals/john-krigger

The linked website below is filled with information. A great resource.

Building Science http://www.buildingscience.com/index_html

In your local area there are seminars you can attend. sign up for some building science classes

http://www.pge.com/pec/classes/

While you are in love with the Passive House Concept it is not the only system that exists. Look at these other systems below and understand what they have in common and what makes them different.

EEBA http://www.eeba.org/

Energy Star http://www.energystar.gov/?c=new_homes.hm_index

LEED http://www.usgbc.org/leed

The above is really only a start as most of us continue to follow breadcrumbs. We review what we think we already know, learn new concepts and try to improve our process.

And to answer your question I would say no but will not elaborate.

RSS

Home Energy Pros

Home Energy Pros was founded by the developers of Home Energy Saver Pro (sponsored by the U.S. Department of Energy,) and brought to you in partnership with Home Energy magazine.

Latest Activity

Rick Wertheim joined Kyle Brown's group
Thumbnail

Wrightsoft - Manual J / Manual D

If you use Wrightsoft to calculate loads or design ducts, you likely have questions.  Get answers…See More
1 hour ago
Rick Wertheim joined Leslie McDowell, BPI's group
Thumbnail

Building Performance Institute (BPI)

BPI is the nation's premier standards development, quality assurance and credentialing organization…See More
1 hour ago
Casey Gesell posted a video

How Dr. Energy Saver Helped Me Grow My Home Services Business | Dealer Testimonials

http://www.drenergysaverdealerships.com | 1-877-479-3637 Real Dr. Energy Saver dealers explain how the proven marketing, sales and training programs allowed ...
2 hours ago
Casey Gesell commented on Tom White's video
Thumbnail

Ducts in an Attic

"Hi Tom, Thank you for sharing our Dr. Energy Saver video!"
2 hours ago
Diane Chojnowski posted a discussion

EEBA 2014 Conference Presentations

EEBA has posted many of the presentations from their conference in St. Louis last week. Check them…See More
2 hours ago
Profile IconJames Tucker, Dean Brewer and CPB Mechanical joined Home Energy Pros
3 hours ago
Tom White posted a video

Ducts in an Attic

http://www.drenergysaver.com | 1-888-225-6260 In episode 66 of the On the Job video series, Larry Janesky, owner and founder of Dr. Energy Saver, is back to ...
18 hours ago
Stacy Hunt posted events
22 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service