30 Oct '11, 5pm

Is rigid EPS insulation an effective air barrier? #green

The reason for my question is that ENERGY STAR states that rigid EPS insulation cannot be used as an air barrier to address thermal bypass unless it is at least 5-1/2" thick. I posed the following question to ENERGY STAR: Footnote 6 is referenced from Item 3 - Fully-Aligned Air Barriers section of the TES Checklist. My understanding is that rigid EPS foam board is an open cell product. I have builders that routinely use 1" and 2" EPS foam board as an air barrier in places such as the attic side of ceiling walls where the ceiling heights change from one section of the house to another. This foam board is foamed in around the perimeters with a canned spray foam product (Great Stuff). My reading of footnote 6 is that the EPS foam board will not qualify as an air barrier in this kind of thermal bypass application unless it is at least 5-1/2" thick. Is my understanding correct?...

Full article: http://www.greenbuildingadvisor.com/community/forum/green...

Tweets

Adding insulation to existing walls #green

greenbuildingadvisor.com 31 Oct '11, 10am

In addition to Martin's list, you may have the option of adding Air Krete foam insulation without removing the existing ba...

Effective air barrier from uninsulated basement...

greenbuildingadvisor.com 28 Oct '11, 2am

We are in the process of retrofitting a 1949 house with a full basement in Cottage Grove, OR. We insulated the ceiling of ...

Green Building Q&A: Plan for exterior wall cons...

greenbuildingadvisor.com 30 Oct '11, 7pm

I am planning a new home in PA - zone 6. The options for insulation/exterior wall construction are mind numbing. My wall w...

under slab vapor barrier and insulation taped? ...

greenbuildingadvisor.com 26 Oct '11, 3pm

Do I need to tape seams in the vapor barrier and xps that will be under my slab-on-grade house foundation? I read Joseph L...

Free Energy from Air Heat Pumps – is that Magic?

Free Energy from Air Heat Pumps – is that Magic?

cleantechnica.com 31 Oct '11, 12am

I was familiar with the very eco correct “geothermal” or ground heat pump, only because I write about green building. This...

Green Building Q&A: what type of vaper barrier ...

greenbuildingadvisor.com 29 Oct '11, 7pm

Hello i came across a situation at my previous home that the stucco would wick the moisture into the house had to take stu...

Proper layering for cathedralized ceiling insul...

greenbuildingadvisor.com 01 Nov '11, 1pm

I work with an architect in Toronto, and we routinely have to try to decide what the best method of insulating attics is i...

7 souces of indoor air pollution: new carpet, broken compact fluorescent lights, new electronics, glues & more

7 souces of indoor air pollution: new carpet, b...

care2.com 30 Oct '11, 1pm

1.New carpet. Carpet materials can emit a variety of volatile organic compounds (VOCs). Tip: If you have carpet installed,...

Thin radiant barrier insulation on siding replacement? #green

Thin radiant barrier insulation on siding repla...

greenbuildingadvisor.com 20 Oct '11, 7pm

For a brick facade house with masonite siding that needs to be replaced (brick front, siding other three sides), an opport...

What is the most effective keyword density?: Keyword density is a crucial part of a search engine optimisation s...

What is the most effective keyword density?: Ke...

seoconsult.com 30 Oct '11, 9am

What is the most effective keyword density? October 30th, 2011 by Rory Tweet Keyword density is a crucial part of a search...

Remembering Donora, Pa., on the Anniversary of its Deadly Smog Incident: Why we need the Clean Air Act.

Remembering Donora, Pa., on the Anniversary of ...

thedailygreen.com 30 Oct '11, 1pm

October 30, 2011 at 8:49AM by Jim DiPeso | comment The incident took place on Halloween weekend, 63 years ago. Over time, ...