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: 80

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

Craig Foley posted an event
Thumbnail

NESEA BuildingEnergy '15 at Seaport World Trade Center, Boston

March 4, 2015 from 10:30am to 12:30pm
High-Performance, Green Homes in Residential Real EstateInstructor Craig Foley will present three…See More
yesterday
Casey Gesell posted a video

ThermalDry® Insulated Floor Decking!

Larry Janesky, owner and founder of Dr. Energy Saver is once again On the Job insulating and finishing a basement in the northeast – and introducing a brand new insulation product: ThermalDry Insulated Floor Decking. ThermalDry Floor Decking was…
yesterday
Profile IconBergen Heat, Travis Thom and Amita Singh joined Home Energy Pros
yesterday
Tom White's video was featured

U.S. Department of Education Webinar for HVACR Educators

Rebroadcast from On April 30, 2013 Sharon Miller and Robin Utz of the U.S. Department of Education conducted a one hour webinar for HVACR educators to provide them firsthand information from Washington. Highlights include: * A blueprint to revise…
yesterday
Tom White posted a video

U.S. Department of Education Addresses HVACR Educators 4-30-2013

Rebroadcast from On April 30, 2013 Sharon Miller and Robin Utz of the U.S. Department of Education conducted a one hour webinar for HVACR educators to provid...
yesterday
Nate Adams's discussion was featured
yesterday
Bud Poll replied to Bud Poll's discussion CO poisoning in Yarmouth Maine
"Hi Chad, I sure would like to hear the follow-up on what caused the CO issue down there.  As…"
yesterday
Chad Mcaulife replied to Bud Poll's discussion CO poisoning in Yarmouth Maine
"I got a call yesterday from a homeowner who had a direct vent furnace installed a year ago and she…"
yesterday

© 2015   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service