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The One Thing I'd Love to See Building Enclosure Workers Do

 
fiberglass batt insulation grade 1 building enclosure

I think a lot about building enclosures. I've looked at a whole lot of houses and seen a whole lot of problems with the enclosure. I've also seen a few good ones, although they're all too rare. If you've been reading this blog for a while, you know I've also written about this topic a lot and have posted a lot of photos, of both the bad and the good. Today I'm going to tell you the one thing I'd love to see when I look at building enclosures.

Fiberglass Insulation Manufacturer Gets Serious About Installation

 
fiberglass insulation owens corning grade i

One of the major fiberglass insulation manufacturers (the color in the photo below gives away which one I'm talking about) is getting serious about the installation quality of fiberglass batt insulation. They've put out a video (embedded below) and a document showing how to achieve RESNET Grade 1 installation quality with fiberglass batts. Have you seen these things yet?

The Fundamentals of Heating and Cooling Degree Days, Part 1

 
thermometer heating degree days

Let's say you did some work on your home to make it more energy efficient - air sealing, more attic insulation, and a duct system retrofit. You've got your energy bills for 12 months before and 12 months after you did the work, and now you want to see how much energy you saved. So you sit down with all 24 months worth of utility bills, convert everything to a common unit if you use more than one type of fuel, and take a look at the numbers. Unless, however, you take into account another important factor, you may be led to incorrect conclusions.

How Much Should You Worry About Asbestos in the Home?

 
asbestos duct tape health safety risk

Asbestos was a popular material for most of the twentieth century, mainly because of its ability to insulate and act as a fire retardant. In fact, it's still used heavily in some parts of the world, such as India and China. We know enough about the risks now, though, that it's banned outright in more than 50 countries according to asbestos.com and banned for some uses in the US. But how worried should you be if you find it in your home?

The Diminishing Returns of Adding More Insulation

 
blown cellulose insulation grade 1

If you're building a house and want to have a really good building enclosure, you need it to be airtight, handle moisture properly, and have a good amount of insulation. Ideally, you'd also consider the effects of solar radiation on the home, but for now let's just focus on the insulation. What exactly is "a good amount" anyway?

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Insulation to Go - Creativity in the Attic

 
attic insulation to go polystyrene boxes 1b

Someone got creative with their attic insulation!

Why Is Clark Howard Giving Bad Energy-Saving Advice?

 
clark howard diy ways save energy bill

Clark Howard is the penny pincher's guru. My wife loves his radio show and website for all the money-saving tips he provides. Naturally, anyone trying to help people save money at home has to address energy use, and Howard does, too. Unlike some others, though, he's generally well educated on the topic because he's hung around the Southface Energy Institute enough to know the basics. (I don't know if he ever used the clip, but he filmed me teaching how to do a blower door test there a few years ago.)

The Pen Test — A Control Layers Tool for Architects and Contractors

 
pen test liquid water control layer epa moisture guide 550

I listened to the IAQ Radio podcast a couple of weeks ago when they interviewed Lew Harriman and Terry Brennan, who were discussing the new moisture control guide published by the EPA last year. Brennan is the lead author of the document, and it's a really great resource full of useful information about indoor air quality, fundamental building science principles, and how to control moisture. If you have anything to do with buildings, you really should download it now and read it.

Stockton Project Demonstrates Huge Home Energy Savings

 
bruce wilcox john proctor dry climate forum 2014

At the Forum on Dry Climate Home Performance earlier this year, I got to hear three building science experts talk about a really cool research project they've been working on in Stockton, California. Bruce Wilcox, John Proctor, and Rick Chitwood (Wilcox and Proctor shown in photo at left) filled us in on the Stockton project, which now has two years of data and shows some really impressive results.

What Happens When You Put a Plastic Vapor Barrier in Your Wall?

 
polyethylene vapor barrier in a wall

A lot of people have heard advice about vapor barriers and vapor retarders. Many of them have walked away confused. A big part of the problem, I think, is that they've been told what to do—"Put it on the warm-in-winter side," or "Never use one"—but they haven't had the physics of what happens explained to them.

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