Sunday, 24 November 2019

Onsite service enterprises



Onsite service enterprises (OSEs) are enterprises that develop and maintain systems and facilities that provide services to occupants of a building or a precinct. Examples of onsite services include hot water, energy, lighting, waste and recycling, mobility, food preparation and delivery, childcare, education and personal care. The full capital and operating costs of providing these services, including installing and maintaining systems, equipment and facilities, are borne by the enterprises and transparent fair costing models are used to determine fees charged for services to ensure there is a reasonable return for the enterprises and that services are affordable.

The paper shows how the concept of OSEs can be applied to a housing development near Alexandra, Johannesburg. A critical evaluation of this application in relation to affordability and sustainability is carried out to determine the significance of the approach. The paper concludes that the OSE concept has significant potential and provides detail on how it can be developed and investigated further.

Saturday, 19 October 2019

5 Questions to ask when choosing a building sustainability rating system



There are now many different rating and indicator systems for building sustainability so it is becoming increasingly difficult to choose and distinguish between these.
This presentation, therefore, goes back to first principles and focusses on 5 questions that can be applied to review systems to choose the one most suitable for your situation.
The 5 questions are:
  1. How does the system define sustainability?
  2. Does the system address your / local priorities?
  3. Does the system change behaviour as well as technical performance?
  4. Does the system help prepare the built environment for change?
  5. Is there an evidence base to confirm that the system will achieve the required levels of change?


Sunday, 30 September 2018

Alternative sanitation for schools



The 2017 National Education Infrastructure Management System report indicated that of the 23,577 public primary and secondary schools in South Africa, there were:
  • 5,175 schools without water or with unreliable water supply
  • 68 schools with no toilets
  • 9,203 schools with pit latrines
  • 7,105 schools with VIPs
  • 2,912 schools with septic tank systems
  • 8,574 schools with flush toilets on municipal systems
This indicates some of the very significant challenges being faced by schools in relation to water and sanitation. One way of addressing this to investigate alternative sanitation models, such as the use of composting toilets, aqua privies and onsite biological systems. These alternatives avoid problems associated with flush toilet (such as large-scale water consumption) and pit latrine (the risk of contaminating groundwater) systems currently used in many schools and have some valuable advantages. Please feel free to contact us on studies, tools and papers being developed in this area.

Urban Ore

Having developed and applied a range of tools to reduce construction waste, such as specifications, contract clauses, construction waste management plans and monitoring and evaluation systems, it is possible to reflect on what works.
Key to achieving less construction waste is having a local network of collaborators who reuse or recycle construction waste. In many areas, these networks are not well established and difficult to find.
It was therefore fascinating to visit Urban Ore in San Francisco. Urban Ore is a city block full of recycled building products. These are bought and neatly stacked on shelves and in yards enabling them to be sold and used in new projects. Many of these recycled products are in good condition and are a fraction of the price of new products. A large amount of waste is also avoided. Further detail on Urban Ore is available here.

Thursday, 16 August 2018

Sustainable Neighbourhoods

Sustainable buildings are not enough; they need to be within neighbourhoods that support sustainability. This is being reflected in an increased focus on neighbourhoods. 

In the US, a hospital faced with escalating costs associated with the treatment of patients moved beyond its borders to work with neighbours to enhance local facilities which improved health.  In 2008, under Medicaid rules, the hospital became accountable for the health costs of people living in the area. This lead to the Healthy Neighbourhood Healthy Families initiative where the hospital worked with local organisations to develop more affordable local housing. It also improved education, healthcare, as well as developing a range of safety and employment initiatives.  

In Canada, Alphabet's Sidewalk Labs, are developing a district of Toronto into a prototype sustainable neighbourhoods. This explores new models for dense lower cost housing, enhanced local mobility based on walking, cycling, buses and trains and innovative energy, water and waste systems. 

The Built Environment Sustainability Tool (BEST) has been developed to assess the sustainability of neighbourhood and can be used to support communities, local government and other organisations develop structured plans to improve the sustainability of neighbourhoods. 

Friday, 27 October 2017

Water Assessment In Buildings




The Water Assessment in Buildings (WAB) tool is a methodology and tool for assessing water equipment and systems in buildings. Design appraisals or walk-through assessments of buildings are used to evaluate proposed or existing water equipment and systems in relation to best practice water criteria within the WAB.

The WAB supports effective assessments of water equipment systems to provide a clear understanding of this in relation to best practice sustainable building water performance. It can also be used to identify areas where water equipment and systems can be improved in order to improve water performance. The download includes:

  • Water Assessment in Buildings (WAB) Excel tool.
  • Water Assessment In Buildings (WAB) Manual on how to use the tool.
  • Water Assessment In Buildings (WAB) Presentation on how to use the tool.
  • Water Assessment in Buildings (WAM) Presentations on water use in buildings.

Water Use Modelling (WUM)



The Water Use Modelling (WUM) tool is a methodology and tool for modeling water use in buildings. Data on water equipment, systems, and usage patterns are entered into the tool to model water consumption patterns in buildings and present this in figures and graphs.

The WUM supports effective modeling of water systems to provide a clear understanding of water consumption implications related to particular water use practices and water equipment and systems. It can also be used to carry out ‘what-if’ scenarios which support effective decision making on water use practices and procedures as well as on the selection and installation of equipment and systems. The download includes:

  • Water Use Modelling (WUM) Excel tool.
  • Water Use Modelling (WUM) Presentation on how to use the tool.
  • Water Assessment in Buildings (WUM) Presentations on water use in buildings.