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: 68

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

Kurt Shafer replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"Graham, what "large fan" are you referring to?  I am fascinated by your comment…"
5 hours ago
Profile IconTom Mallard, Eugene Swier and 2 other members joined Hal Skinner's group
Thumbnail

Radiant Control Coatings

A group where people who work with radiant barrier coatings can let others know all of their uses.See More
6 hours ago
Graham Irwin replied to Tom Conlon's discussion Whole House Fans - Love 'Em or Not?
"I think it is important to check the energy consumption of such a large fan, even assuming it can…"
7 hours ago
Hal Skinner added a discussion to the group Radiant Control Coatings
Thumbnail

Rooftop A/C units and exposed ductwork

Lets start a discussion about rooftop A/C units and exposed ductwork. The worst place to put a…See More
8 hours ago
Richard Beyer posted discussions
8 hours ago
Brandon Walton replied to Brandon Walton's discussion EFAZ and APS Hosting Huge Welcome Party!!
8 hours ago
Brandon Walton shared their discussion on Facebook
8 hours ago
Brandon Walton posted a discussion

EFAZ and APS Hosting Huge Welcome Party!!

If your in Arizona on August 20th, stop on by and check it out!APS Home Performance Program Q&A…See More
8 hours ago
Brandon Walton posted an event

Efficiency First AZ is Hosting Huge Meeting August 20th! at Rennick's Restaurant in the Hilton Phoenix Airport Hotel

August 20, 2014 from 5:30pm to 7pm
APS Home Performance Program Q&A w/new leader Maggie Gibbs!Join Efficiency First Arizona (EFAZ)…See More
9 hours ago
Dennis Heidner replied to Jamie Kaye's discussion Flickering LED lights
""CFLs produce light by using electricity to instigate a chemical recation between mercury…"
10 hours ago
Richard Beyer joined Michael Stuart's group
Thumbnail

INFRARED THERMOGRAPHY USERS

This group is dedicated to knowledge sharing and discussion of infrared thermography for building…See More
10 hours ago
Profile IconTomás León, Tauran Ivall, Alex Burnham and 1 more joined Home Energy Pros
10 hours ago

© 2014   Created by Lawrence Berkeley National Laboratory.

Badges  |  Report an Issue  |  Terms of Service