What is sustainability?
It is said to be meeting the needs of the present without compromising the future generations to meet theirs.
For example, producing enough energy for us to live now however to do it in a sustainable manor so we dont pollute the world to not allow future generations to live comfortably.
What are the three pillars of sustainability?
Environmental, economic & social
What does each sustainable pillar mean?
Environmental - pollution like carbon emissions, energy & water consumption
Economical - financial performance so making profit but not at the expense of the environment
Social - support the community and finding ways to give back into the community
How does sustainability influence building design?
To reduce the negative impact a building has on the environment by improving building performance with better insulation, more efficient heating methods such as air source heat pumps. Promoting renewable energy resources
What is an air source heat pump?
Its classed as a renewable way to heat water for homes. Its how fridge works but in reverse.
It takes renewable heat from the outside air (even at cold temperatures, most commly down to -20 degrees C) and heats up a refrigerant to turn it into a gas, the gas gets compressed and increases temperature even more, then its condensed to transfer the heat into the homes heating system. The now cooled refrigerant loops back to start the process again.
It only needs electrical supply and water supply, an air source heat pump could be used with solar panels to create the electricity for the pump which would then make a highly efficient home.
Suitable for retro fit and on new builds. And can help for social housing to 1. Reduce carbon emmision and 2. Also help reduce fuel poverty as they allow cheaper running costs.
Because they are classed as a renewable resource home owners could get money back through government schemes. (Renwable heat incentive)
What are some examples of sustainable design in PCC?
Wilmcote house is a passivhous design which promotes air tightness & high levels of insulation
The SHO is made with glulem timber which is from a sustainable forest
What is the importance of sustainability in the construction industry?
Buildings are one of the largest consumers of natural resources & produce lots of greenhouse gases therefore it is important to reduce emissions and energy use as it has a large part of the whole worlds negative impacts.
What is BREEAM and what do they do?
Building research establishment environmental assessment method
They are a sustainability rating scheme that can give definite ratings for buildings design to help improve sustainability in the construction industry
What targets are set out in the Climate Change Act 2019?
That the UK will become ‘net zero’ (balanced emissions) by 2050
PCC have the same target by 2030
What building regulation covers sustainability?
Approved document L
When did EPCs first become required?
1st October 2008
What regulations transpose EPCs into law?
The Energy Performance of Buildings Regulation 2012, which intends to improve the energy efficiency of buildings.
Air conditioning is inspected
What is the EPBD?
Energy Performance Building Directive and it makes the energy efficiency of buildings transparent by requiring EPCs
It aims to improve the energy performance of buildings
What is the minimum EPC rating?
E (since April 2018)
Will tighten to C by 2025 for new tenancies and by 2028 for all tenancies.
What factors have the highest weighting on EPC rating?
Heat loss walls, age, heating type / fuel
What is RdSAP?
Reduced standard assessment procedure, it makes standard assumptions of occupancy and behaviour in existing dwellings
What is a DEC?
Display Energy Certificate,
They show the energy performance of a building based on actual energy consumption. They are used for public buildings or a large buildings with 500m2 or more floor area.
How do you contribute in your work to be sustainable?
Paperless system, when booking appointments minimise car travel time.
Also for example completing EPCs if the insulation is low or there is none, i would raise a repair for some to be installed to improve the energy performace of the building
What can be found on an EPC?
Energy efficiency rating (letter & number)
Breakdown of property’s energy performance (wall, roof, window, heating types etc)
Environmental impact of the property (estimated carbon emissions)
How to improve energy performance (recommendations)
Estimated savings both cost and energy
Details of the property
Details of the survey (dates, asessor)
The rating in letter & number form
Breakdown of perfomance (wall type, heating type, windows etc)
Estimated running & saving costs
Recommendations & their costs / energy savings
Environmental impact (estimated emmisons)
Can you name any sustainable bodies or certification schemes?
Building Research Establishments Environmental Assessment Method - who rate buildings energy efficiency
Leadership in Environmental Energy Design - rating system who provides a framework for healthy, highly efficient, and cost-saving green buildings
SKA rating - for retro fits specifically
What do BREEAM do?
Provide ratings for buildings from outstanding to pass.
BREEAM aims to ensure that its standards provide social and economic benefits whilst mitigating the environmental impacts of the built environment.
Can you name any national or international legislation regarding sustainability?
Climate Change Act 2008
Energy Performance of Buildings Regulations 2012
What is the ‘embodied energy’ or megajoiles per kg for concrete?
4.5MJ per kg
What are the 10 categories for BREEAM?
Health & wellbeing
How would you input a porch on an EPC?
Any heated porches should be included
Any external porch that is not heated are disregarded if there is a separating door
Any internal porches that are not heated but thermally separate should also be disregarded