high-R wall

Choosing the Right Wall Assembly

Posted on April 25,2015 by ScottG in 2x8 wall

Southwest Nebraska sounds like the kind of place that gets all kinds of weather: hot and occasionally humid summers, cold winters, and by many accounts lots of wind. This is where Nicholas C will be building his house, and the question is, how? He's done so much reading on the subject that he's now confused by the number of options he has. Getting it right is important because Nicholas plans on living in the house for a long time. His best thinking so far? A 2x8 stud wall framed on 16-inch centers and insulated with blown-in cellulose, then wrapped in 2 inches of rigid foam insulation.

Five Different High-R Walls

Posted on April 25,2015 by SamHagerman in high-R wall

Our construction company, Hammer & Hand, has built several wood-framed Passive House buildings in the Pacific Northwest. Over the years, our approach to building high-R walls has evolved.

Monitoring Moisture Levels in Double-Stud Walls

Posted on April 25,2015 by user-756436 in cold OSB

Most wood-framed buildings have no insulation on the exterior side of the wall sheathing. That means that the wall sheathing gets cold and wet during the winter.

Choosing the Right Wall Assembly

Posted on April 25,2015 by ScottG in cold OSB

Michael Roland is designing a new house and trying to choose the right wall assembly. It’s down to a choice between a double-stud wall filled with fluffy insulation, or a single wall wrapped in a layer of rigid foam insulation.

Designing Superinsulated Walls

Posted on April 25,2015 by user-961160 in cellulose

[Editor's note: Roger and Lynn Normand are building a [no-glossary]Passivhaus[/no-glossary] in Maine. This is the 12th article in a series that will follow their project from planning through construction.] I’ve always enjoyed watching new homes being built. From the humble beginnings of a simple hole in the ground, a job site gradually changes as a succession of tradesmen arrive daily to craft concrete, lumber, roofing, windows, drywall, copper pipes into basic shelter, before giving way to a parade of cabinets, appliances and other finishing touches.

Choosing a Cost-Effective Wall System

Posted on April 25,2015 by ScottG in British Columbia

Erik Olofsson is planning a small house in the Rocky Mountains of British Columbia. Ideally, he’d like to get the walls close to R-40. The question is how. “Seeing that the received opinion around GBA is the tandem of polyethylene sheeting and exterior rigid foam is not ideal, what do the builders on this site recommend?” he asks in a post at the GBA Q&A forum. “Larsen trusses seem fairly labor-intensive and rigid foam is expensive ... Is a double-stud wall the answer?”

All About Larsen Trusses

Posted on April 25,2015 by user-756436 in double stud

A Larsen truss is a type of wall truss used to build a thick wall — thick enough to provide room for above-average amounts of insulation. It was developed in 1981 by John Larsen, a builder in Edmonton, Alberta. In honor of the 30th anniversary of the Larsen truss, the time has come for a definitive article on the invention. This report includes an interview with the inventor of the Larsen truss, a history of its use, and a discussion of its advantages and disadvantages.

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