Tag Archives: green building

Green Building Rivalry is Growing

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An eco-friendly building rating system that has powered a green arms race across the nation now faces a challenge from policymakers and an upstart rival.

LEED, the long-standing king of green construction and renovation projects, has become a de facto brand in cities such as Portland, Ore., where sustainable growth has been the rage for years.

But that could change as legislation and executive orders in several states have all but banned Leadership in Energy & Environmental Design from public contracts, and a new system known as Green Globes has emerged and marketed itself as a simpler, less-expensive alternative.

“LEED is a good process,” said Byron Courts, director of engineering services for Portland’s Melvin Mark Companies. But it represents “a huge bureaucracy that’s extremely complex and costs quite a bit.”

Courts has used both LEED and Green Globes, which has issued about 850 building certifications in the past few years and has recently picked up support from the federal government.

LEED supporters say the emerging opposition comes from lobbyists seeking to damage the industry leader and increase the prominence of Portland-based Green Globes.

read more at: http://www.utsandiego.com/news/2013/dec/14/tp-green-building-rivalry-is-growing/

Green Buildings for Tough Times

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Start with the basic principles that govern how energy crosses a building enclosure: convection (air leakage), conduction (movement through walls, for example), and radiation (of sunlight through windows, for example). I choose building components that best address energy flow by design, and that require proper installation, but not extra labor and skills, to make them work.

Can we build an energy-efficient, stick-framed envelope insulated with fiberglass? Sure, but it takes a lot of work and requires skill, persistence, and a ton of caulk. Air leaks through stick-framed walls at the top and bottom plates; between the drywall and the sheathing; around windows and doors; and through light fixtures, switches, and outlets.

Does energy efficient upgrades add value to your home?  Contact the appraisers at www.scappraisals.com for your value questions.

 

We can still use stick framing and dramatically reduce air leakage with properly applied sprayed polyurethane foam, reducing the need to caulk holes from wiring or plumbing. Foam costs 3 or 4 times as much as fiberglass, but if it’s applied as directed, it fits tightly, insulates, and doubles as an excellent air seal—far better than fiberglass. If we’re concerned about heat loss through studs, we can either  shear the exterior with rigid foam sheathing, or better yet, use SIPs, which eliminate a great deal of framing lumber.

 

I spray open-cell foam directly to the underside of the roof deck, from the ridge down to the tops of the walls, creating a conditioned attic. This stops air leakage to the outside through any penetration in the ceiling, eliminates the need for roof ventilation, and does not, in my opinion, lead to premature deterioration of the shingles. All HVAC supply and return ducts are within the conditioned space, access to plumbing and wiring in the attic is simplified, and recessed ceiling lights need not be airtight or protected from insulation. Admittedly this insulation method costs more, both because foam costs more than fiberglass, and because there’s more surface area to cover. Nevertheless, foam seals out air leakage better than fiberglass, and the home’s energy performance is greatly improved.

Read entire article at: http://www.homeenergy.org/show/article/magazine/130/nav/issues/id/1868?utm_source=June+4%2C+2013+e-newsletter&utm_campaign=HEM+Enewsletter&utm_medium=email

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Green Buildings Outperformed in Vacancy, Rental Rates

Green” is better when it comes to lower vacancy rates and higher rents, according to the CBRE brokerage in San Diego.

CBRE looked at buildings with LEED certification or Energy Star ratings. LEED stands for Leadership in Energy and Environmental Design, a ratings program by the U.S. Green Building Council. Energy Star is a rating system by the U.S. Energy Department.

As of June 30, green buildings overall were 11.7 percent vacant compared with 15.7 percent of nongreen buildings.

The lease rates on average were $2.42 per square foot per month, compared with $2.04 for nongreen.

“Green buildings continue to outperform non-green buildings in the San Diego market,” CBRE said in its recently released MarketView quarterly report.

The gap is less for Class A and B buildings, those that charge the most rent and offer the best locations and amenities. Nongreen buildings in this category charge an average $2.24 per square foot. Virtually all green buildings are Class A or B, said CBRE Research Manager M. Lawrence Kopp

Read more at: http://www.utsandiego.com/news/2012/sep/05/green-buildings-outperform-vacancy-rental-rates/

Disclaimer: for information and entertainment purposes only