Prefab Straw Insulation Panels Make Very Sustainable Homes

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The sustainable builder BaleHaus recently constructed several energy-efficient homes, which were built using a prefabricated straw insulation system made by the company ModCell. BaleHaus is actually made up of 3 firms working together, namely Cadan Developments, ModCell, and White Design. So far the group has built several different sized homes, from townhouses to apartments, which goes to show just how versatile the straw building system can be.

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By |April 7th, 2015|Prefab|0 Comments
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13 Reasons to Plan a Foam-Free Enclosure

Spray foam has been the subject of much discussion in green building circles.  Whether the concern is installation safety or global warming potential or better energy performance, it seems there’s no shortage of debate.  Along these lines, the guys at 475 High Performance Building Supply, a Brooklyn-based provider of products for high-performance projects, have a list describing 13 ways foam fails, starting with the “dangerous toxic ingredients.”

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By |December 18th, 2012|IAQ, Materials|14 Comments
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Wood Fiber Insulation Arrives in the USA

Looks like wood-fiber insulation board is coming to the USA, according to a Greenbuild update on Green Building Advisor.  Agepan THD is the name of the product and it’s used as exterior sheathing for walls and roofs.  Agepan boards connect in tongue and groove fashion and insulate to R-5.74 per panel (2″ x 74.5″ x 23-5/8″).  The material has a high permeability (18 U.S. perms) and can be used in a wall assembly to dry to the exterior.  It’s offered through Washington-based The Small Planet Workshop Store.

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By |December 3rd, 2012|Energy Efficiency, Materials|0 Comments
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Omni Block is an Insulated Concrete Block

I noticed in Dwell‘s Prefab edition that one prefab was partially built with an innovative concrete masonry unit (CMU) by Nevada-based Omni Block.  Omni Block is a structural CMU filled with Expanded Polystyrene inserts.  Walls with Omni Block can be finished or, in the case of the Simpatico project (see below), left exposed for a modern interior or exterior.  The manufacturer says the material is fire resistant, durable, and thermally efficient, and the blocks come in colors or with special aggregates.

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By |November 29th, 2012|Energy Efficiency, Materials|5 Comments
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Terralite is a Light New Insulative Cement

Portland-based Terra Bona Materials launched Terralite Cement at Greenbuild this year hoping to deliver a product that meets the energy-efficiency demands of the greater building science community.  Terralite is a “lightweight” product made with cement and an aggregate that includes expanded polystyrene.  Marketing materials claim the product is 20% of the weight of traditional concrete and, according to company president Terry Cotton, insulative with an R-value of 1.8 per inch.

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By |November 27th, 2012|Energy Efficiency, Materials|0 Comments
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New Roof-Attic Design Improves Efficiency

The media relations group for Oak Ridge National Laboratory just released more information about recent field tests by ORNL of a new roof and attic system that keeps homes cool in the summer and prevents heat loss in the winter.  The system is explained in the graphic embedded above (click to expand).  In addition, I’ve included some graphics below to illustrate more of what the system looks like and how it saves energy.

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By |September 12th, 2012|Energy Efficiency, Technology|14 Comments
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