29 Oct '13, 5pm

Vented ceiling Dense pack cellulose vs Spider or Optima #green

At dense-pack densities there isn't a meaningful thermal performance difference without a top-side air barrier, as long as the interior side of the assembly is air-tight. (One-side air tightness is sufficient for delivering the R-value with the amount of air retardency you get with dense pack.) But I'm not sure how you can even GET dense-pack densities without risk of compromising the depth of vent channel side without using a fairly rigid material for the baffle though, and it's not a lot of labor to air seal it, as Martin recommends. The more layers in an assembly you can make air tight, the more reliable and resilient the long-term performance becomes. The baffle/exterior air barrier needs to be vapor permeable (to water vapor) though, or moisture can & will accumulate in the air-permeable insulation under some conditions. The whole point of the vent space is to allow b...

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

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2010 VS 2013…

2010 VS 2013…

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Cellulose is fine- the BEST choice in fact, and a few drops of wind-driven rain through the vents aren't going to cause an...

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greenbuildingadvisor.com 20 Oct '13, 4am

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thedomains.com 29 Oct '13, 2pm

In a blog post written by Lauren Pitman for slamstrategy.com.au , looks at the perception that all new gTLD applicants tha...