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Cork Insulation on Our Farmhouse

Why we chose cork exterior insulation for our net-zero-energy house
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Among the innovative—some might say weird—products we’re trying out at our Dummerston, Vermont farmhouse, none is more unusual than the expanded cork insulation we’re currently installing as a layer of exterior rigid insulation. As I mentioned in a blog last summer, cork insulation has a great story behind it.

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Windows 2.0 – Report from Leonard Farm

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Building complex window surrounds for a deep-energy retrofit

Insulated, splayed window surrounds that will frame the exterior wall insulation. The Pro Clima housewrap on the window surrounds will be taped to the wall housewrap after insulating. Click to enlarge.Photo Credit: Alex Wilson

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10 Tips for Passing the LEED Green Associate Exam

Despite waiting till the last minute to study, I got a really good score and became a LEED Green Associate. Here’s where I spill all my secrets!
by P.J. Melton

Originally published 03/13/2013, updated 8/7/2018

Let’s get one thing straight: I don’t usually procrastinate.

But when I read that being a LEED Green Associate involved “basic” green building knowledge, I figured I had things pretty well under control. I started studying six days before the test.

Need help preparing for a LEED v4 exam?

LEEDuser’s Study Guide to the LEED v4 Green Associate Exam

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Is Natural Gas Going to be Our Savior?

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A gradual shift in the supply-and-demand balance for natural gas and increasing shipments of LNG will bring the prices back up, while the risks of fracking continue to be debated

Gas well in the shale country of Pennsylvania. Click to enlarge.Photo Credit: Philly Workers Voice

In many parts of the country and for many applications, natural gas is considered a panacea to our energy challenges.

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New Rules for Formaldehyde in IEQc4.4

LEED Interpretation #10250, issued January 1, 2013 and applicable to all LEED 2009 projects, as well NC-v2.2 and other systems, now allows for the use of urea in combination with melamine formaldehyde (MF) in certain circumstances.
by Brent Ehrlich

Editor's Update: As expected, LEED Interpretation #10250 was revisited by USGBC in its 4/1/13 release. This article has been updated to address that revision. 

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FTC Cracking Down on False R-Value Claims

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Large fines levied on companies making deceptive claims about R-values

Exaggerated claims, like this one for SUPER THERM, claiming R-19 for a coating of paint, are getting the attention of the Federal Trade Commission. Click to enlarge.Photo Credit: Superior Products International.

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Commercial-Scale Wind Power

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Why larger wind development projects make sense

Two 2.5 MW wind turbines in the Sheffield, Vermont wind project. Click to enlarge.Photo Credit: Martin Holladay

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Wind Power: Why it Doesn’t Make Sense Everywhere

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I'm a huge fan of wind power, but we should recognize that some applications of wind don't make sense

Aerovironment wind turbines on the Boston Museum of Science. Performance has been poor and Aerovironment has discontinued the product. Click to enlarge. 

Photo Credit: David Rabkin, Boston Museum of Science

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