Tag Archives: carbon reduction

Portugal study finds enviro benefits from recycling construction, demo waste

By: SWR Staff

2013-05-27

The European Union’s Science for Environment Policy publication has published a May 2013 study by Portuguese researchers that has projected huge environmental benefits from recycling construction and demolition waste.

Even after accounting for the impacts of the recycling process itself, the researchers found that over a standard 60-year lifespan, the recycling plant would likely produce more than 135,000 tonnes of CO2. However, their research found that the same plant would have prevented emissions of about 1.4 million tonnes over the same period, more than ten times what it produced.

Coelho, A. & de Brito, J.’s research paper, Environmental analysis of a construction and demolition waste recycling plant in Portugal – Part I: Energy consumption and CO2 emissions.

The research results predicted that the plant wasto use an amount of energy equivalent to more than 71,000 tonnes, but it conserved 563,000 tonnes, approximately eight times as much.

The researchers noted that these environmental benefits can only come to be, however, if the output materials produced by the recycling facility are effectively sent out and used for the fabrication of new products (especially construction related ones).

Read the entire article via Portugal study finds enviro benefits from recycling construction, demo waste.

Life Cycle Assessment Methods for Building Materials’ Recovery and Reuse

Bradley Guy & Benjamin Holsinger teach at The Catholic University of America in the School of Architecture and Planning.  They have been working on the Life Cycle Assessment Methods for Building Materials Recovery and Reuse.

They measured the carbon footprint of building material reuse. They focused their study on Community Forklift a reuse center in Edmonton, Maryland.

The above slide shows the CO2 emissions created and reduced by Community Forklift operations.

If you are a reuse center professional, start looking into carbon offset opportunities like the kind they create at Bonneville Environmental Foundation.

Because according to this chart, your reuse center could have an entirely new source of income potential in selling carbon off-sets.

-Sara Badiali RA Posting Editor

Demolition costs more than renting a bulldozer – Journal of Commerce

Just because you are old and you leak a little, it doesn’t mean you should be put down. I am also referring to buildings.

Charles Olfert

Architecture Matters

Charles Olfert

Most architects have heard “the greenest building is the one that already exists.” Consider how much energy it takes to create a new building.

Richard Moe, National Trust for Historic Preservation President, estimates constructing a new 5,000 square-meter commercial building releases about the same amount of carbon into the atmosphere as driving a car 2.8 million miles.

Architecture Matters

Charles Olfert

He also notes it takes approximately 65 years for a green, energy-efficient new office building to recover the energy lost in demolition.

Most new buildings in Canada are certainly not designed to last anywhere near that long.

I would suggest the benefits of re-development go far beyond carbon reductions. Our cities desperately need the aesthetic diversity and cultural activity supported through adaptive re-use.

Given the benefits of re-use – why are so many buildings demolished? There are three basic reasons.

First, too many politicians still feel it is better to cut the ribbon in front of a brand new, relatively nondescript, glass box than make the necessary longer term commitment towards a comprehensive, complex urban redevelopment strategy.

The second factor is more complicated. Current building codes and civic building permit policies make it very difficult to save buildings. It seems an old building is automatically “grandfathered” as a non-compliant fire hazard as long as the use doesn’t change. However, once renovated, EVERYTHING needs to be “brought up to current standards”. Many developers try this once or twice and then simply throw up their hands in frustration.

Almost everyone appreciates a century old marble staircase with intricate wood posts and wrought iron railings. These stairs can function effectively for hundreds of years, but become immediately “unsafe and non-compliant” the minute a building changes use.

The issue of course is insurance and legal responsibility. Can you be “partially compliant” – who takes responsibility?

I am not advocating unsafe buildings. In fact, I am suggesting that many older buildings could be much safer if there were some flexibility in allowing small changes in use, with incremental safety improvements.

Many landlords and developers are not prepared to spend any money on an existing building because it is too expensive to do a complete code upgrade. Also discouraging – many of those upgrades destroy some of the best features of the building. The result is many attractive, older buildings sit empty or end up with marginal, illegal or existing unsafe uses.

The third factor is related to code issues and the subtle way regulations discourage mixing uses in buildings. For example there are typically and quite logically, fire separation requirements between building uses which can be very complicated.

As we try to encourage people to live downtown, we should seriously consider changes to the interpretation and application of zoning and building code requirements to make it safe, legal and cost effective to have people living above retail and restaurant facilities using our rapidly vanishing, but extremely valuable existing building stock.

Charles Olfert is the Architecture Canada | RAIC regional director for Manitoba/ Saskatchewan. He is part of an amateur Blues Band that practices in a heritage building.

The application of regulations typically discourages upgrades of this building as well as many others in the neighbourhood.

via Demolition costs more than renting a bulldozer – Journal of Commerce.