Curbside Recycling for Polystyrene Foam

Posted on April 21,2015 by ScottG in EPS

In a first for the province of Nova Scotia, a waste recycling agency has launched a curbside recycling program for expanded polystyrene (EPS) foam, turning waste foam into blocks of condensed material that can be sold to manufacturers and turned into new products. Two years in the making, the program got off the ground in mid-November, according to an article in the The Kings County Advertiser and Register.

Part 3 of GBA’s Passivhaus Video Series

Posted on April 21,2015 by GBA Team in EPS

At the Passivhaus job site in Falmouth, Massachusetts, architect Steve Baczek specified the installation of 10 inches of EPS under the slab-on-grade foundation. After the concrete had been placed, more rigid foam was installed above the slab, to bring the finished floor assembly to R-50.

Two New Exterior Insulation Products for Walls

Posted on April 21,2015 by user-756436 in DuPont

Exterior wall insulation? That usually means rigid foam and furring strips — although occasionally, it means mineral wool insulation and furring strips. But there are other options. Two new products offer builders new ways to keep their wall sheathing warm.

A German Deep-Energy Retrofit

Posted on April 21,2015 by Andrew Dey in deep energy retrofit

I recently visited a job site on the outskirts of Berlin that had previously caught my eye. Although the buildings were shrouded in the usual scaffolding and screening, I had noticed while biking by that the work involved “energetische sanierung,” or energy retrofitting.

In Cold Climates, R-5 Foam Beats R-6

Posted on April 21,2015 by user-756436 in EPS

Researchers have known for years that most types of insulation — including fiberglass batts, extruded polystyrene (XPS), and expanded polystyrene (EPS) — perform better at low temperatures than high temperatures. The phenomenon was described by Chris Schumacher, an engineer and researcher at Building Science Corporation, at a conference in 2011: “If you measure the R-value of an R-13 fiberglass batt, you’ll get different results at different outdoor temperatures. If the outdoor temperature rises, the R-value goes down.

Do We Really Need 12 Inches of Foam Under Our Slab?

Posted on April 21,2015 by user-961160 in EPS

[Editor's note: Roger and Lynn Normand are building a [no-glossary]Passivhaus[/no-glossary] in Maine. This is the 21st article in a series that will follow their project from planning through construction.]

Exterior Insulation Is Like A Sweater For Your House

Posted on April 21,2015 by user-1048334 in EPS

There are many construction and insulation approaches which allow a builder to create walls and ceilings with high R-values and low levels of air leakage, creating a much better envelope than is achieved with standard framing methods. Structural insulated panels (SIPs), insulated concrete forms (ICFs), double-stud walls, and advanced framing can all produce more energy-efficient buildings than the ol' stick-built number. The one thing they can’t do is to improve the efficiency of an existing house.

Making Healthier, Greener Foam Insulation

Posted on April 21,2015 by AlexWilson in EPS

As readers of this blog know, I’ve come down fairly hard on certain types of foam insulation over the years. The downsides include the blowing agents used in extruded polystyrene (XPS) and most closed-cell spray polyurethane foam and the flame retardants that are added to all foam-plastic insulation to impart some level of fire resistance.

How to Install Rigid Foam Sheathing

Posted on April 21,2015 by user-756436 in EPS

UPDATED on March 18, 2015 What’s the best way to install foam insulation on the outside of a wall? Although GBA has published many articles and videos on the topic, we continue to receive frequent questions from readers asking how to install rigid foam sheathing on exterior walls — so it’s time to provide a primer on the topic.

Can Foam Insulation Be Too Thick?

Posted on April 21,2015 by user-756436 in EPS

In the U.S., designers of cutting-edge superinsulated homes generally recommend 2 to 6 inches of rigid foam insulation under residential slabs. For builders who use extruded polystyrene (XPS), the most commonly used sub-slab insulation, that amounts to R-10 to R-30.

Green Basics Insulation Overview
Green Basics Insulation Choices

Recycling Expanded Polystyrene

Posted on April 21,2015 by user-756436 in EPS

A New Machine “Densifies” Discarded Foam TALAHASSEE, Fl. — Most of the nation’s discarded expanded polystyrene (EPS) — including hamburger clamshell boxes, coffee cups, protective foam packaging inserts, and pieces of building insulation — goes straight to a landfill. Recent technical improvements in recycling equipment, however, have begun to make EPS recycling cost-effective.

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