BREEAMIn this 21st century that we are living in building andtheir use has affect almost every man, woman and child in the world because aswe all live in buildings everywhere it affects us a lot and it has a greaterimpact on the natural world than any other human activity. Buildings affect ourenvironment at three levels, the global, the neighbourhood and the indoorlevel. The building research establishment environmental assessment method(BREEAM) has been developed in order to promote the design and construction ofbuildings which are friendlier to the environment especially in UK thegovernment has interpreted green buildings into a form that focuses upon a lowcarbon agenda and the economic benefits that arise from adopting this withinthe assessment method is seen as the first green building rating system in theworld, launched by BRE(building research establishment) in the UK. In additionto BREEAM enables evaluation of a buildings lifecycle in view to design tobuild , operation and refurbishment. BREEAM provides new construction, In-userefurbishment and fit-out communities and infrastructure manuals for planners ,local authorities, developers and investors.The BREEAMrating benchmark levels enable a client or other stakeholder to compare an individualbuilding’s performance with other BREEAM rated buildings and the typicalsustainability performance of new non-domestic buildings in the UK.In thisrespect each BREEAM rating level broadly represents performance equivalent to: Outstanding: Less than top 1% of UK new non-domestic buildings (innovator) Excellent: Top 10% of UK new non-domestic buildings (best practice) Very Good: Top 25% of UK new non-domestic buildings (advanced good practice) Good: Top 50% of UK new non-domestic buildings (intermediate good practice) Pass: Top 75% of UK new non-domestic buildings (standard good practice)6.
An unclassified BREEAM rating representsperformance that is non-compliant with BREEAM, in terms of failing to meeteither the BREEAM minimum standards of performance for key environmental issuesor the overall threshold score required for formal BREEAM certification . Environmental issues addressed in BREEAMGlobalissues If we talk about on a global level , a major target is toreduce the contribution of buildings to the greenhouse effect by cuttingemissions of carbon dioxide, the major greenhouse gas, and by reducing the useof chlorofluorocarbons (CFCs), which also damage the ozone layer. Carbondioxide levels in the atmosphere have been rising steadily in the last 25years. In the UK, buildings contribute almost half the total CO2 emission as a result of energy use forspace and water heating, lighting, appliances and services.
This could bereduced substantially by improved energy efficiency, by increased thermalinsulation, and by more efficient heating and lighting systems and appliances .BRE research has shown that CO2 fromexisting dwellings could be reduced by 25 per cent solely by applying energyefficiency measures known to be cost-effective; similar savings would bepossible in other types of buildings. InternalissuesThe second element of BREEAM is the indoor environment .The highest concentrations of most airborne pollutants are found insidebuildings, including for maldehyde , cigarette smoke and bacteria. We focus onthese issues so that the indoor quality of the air can be pure and comfortablefor the building occupants. It also includes the use of hazardous materials,including lead-based paint, asbestos and correct use of alternative cavity fillmaterials.
In BREEAM credit is also given for the use of high frequencyballasts in fluorescent lighting, which can provide a more friendly and comfortableenvironment. NeighbourhoodissuesThe third issue in which BREEAM focuses is theneighbourhood issues ,where credit is given for a system with no wet coolingtower, or with a cooling tower. Another issue in this can be the tall buildingsat ground level which can be an issue in high winds because BREEAM gives creditif a building is less than 20 m high or it should pass the wind tunnel test. Objectivesfor BREEAMThe main objectives of the assessment method are asfollows:· Toprovide recognition for only those buildings which are friendlier to the globalenvironment than normal buildings.· Toraise awareness of the dominant role which is the use of energy in buildingsplays in global warming through the green house effect, in the production ofacid rain and in the depletion of the ozone layer.
· Toprovide a common set of targets and standards so that false claims of increasedenvironmental friendliness are avoided.BREEAM provides both a structured method for makingenvironmental assessments of buildings and a recognized set of standards forgood environmental performance, using well-established technology and designprinciples.