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SUPERVISOR: A.M.PAPADOPOULOS
SCHOOL OF SCIENCE & TECHNOLOGY
Tzouliana Kraia
MSc in Energy Systems – October 2011
Renovation Vs New Construction‘’ An Integrated Comparison’’
Presentation Outline
Green Construction Use of energy Sustainability in the built environment Renovation Vs New Construction Important Interventions Renovation /Reconstruction Demolition Listed Buildings: “A special case of buildings’’ Energy and Listed Buildings Study building Building Characteristics Interesting architectural elements Major interventions can be done Results
Green Construction
By Using: New systems Technologies Materials Renewable energy sources
High energy efficiency and effective environmental protection
This effort concerns the whole society, because there are significant benefits in every level, throughout the building’s life cycle and for all stakeholders
Use of Energy Sustainability in the Built Environment
It is worth mentioning that in Europe: The energy consumption in buildings represents
approximately 41% of energy produced Approximately 45% of global CO2 emissions come from
buildings CO2 affects at the creation of the ‘’greenhouse effect’’ and
global climate change
Use of Energy Sustainability in the Built Environment
Building and construction sector is strongly
related to economy, community, health and
environment
This is the reason why major worldwide investments are
related to buildings / constructions
22%
21%
30%
23% 4%
Worldwide investments in the building and construction sector
north America Japan Europe Developing Countries
Other Developed Countries
Renovation Vs New Construction
In order to study a building it is important to consider the
extent of an intervention
Interventions categories:
1. Cleaning
2. Maintenance
3. Repair
4. Restoration
5. Renovation
6. Reconstruction
Important Interventions
Renovation: Renovation combines the features of simple
maintenance and repair. However, it has to renew the
building - or part of the renovated
Reconstruction: When we use new materials in a new
application without changing its original form, then we have
reconstruction
New construction: Refers to site preparation and construction
of entirely new structures and significant extensions to
existing structures whether the site was previously occupied
Demolition: Is the act of deliberately destroying it, often in
order to build something else in its place
Renovation /Reconstruction
Rapid rise in the reconstruction of old houses reported in the
last months where the real estate crisis has been extended
enormously
The greatest demand are the houses of 30 years and over, due
to their extremely cheap price
The cost of the reconstruction may be up to 100% of the
house’s value.
An ageing house, in its current situation, loses its value rapidly
For each decade that passes, a building loses 12% of its value
So, a house in order to be sold at a half price than a new one
should be no more than 40 years old
Demolition
Demolition Methods
Demolition DeconstructionMost commonly used
method.In populated areas is usually, the method of top-down demolition
The reverse procedure fron construction. The purpose is to restore building materials (reuse/create new). Begins from inside to outside, top to bottom.
Waste from excavation, construction and demolition is
any material or object resulting from these processes
Generated during processes such as construction/demolition
of buildings at the end of their useful life, renovation or
aesthetic and functional upgrades, as well as disasters caused
by extreme weather events
Listed Buildings: ‘’A special case of buildings’’
Building complexes, individual buildings, parts of buildings, as well as
elements of the environment of these can be classified as listed due to
their special historical, artistic, scientific, planning, architecture,
folklore, social and aesthetic value and their character
Specifically
A building dating before 1830, is an ancient monument and falls
within the responsibility of Ministry of Culture and the Status of Law
3028/2002
A building dating after 1830, is under the responsibility of Ministry of
Culture and of the Ministry of Environment, protected by the provisions
of the General Building Rules (Law 1577/1985, as amended by Law
2831/2000) and can be declared as a listed
Energy and Listed Buildings
Listed buildings are often excluded from technological and sustainable development, due to strict/complex laws and planning frameworks
Characteristics of listed buildings
Energy Characteristics
Large internal heights/increased volumes
Effective cooling behavior. Possibly increased demand for heating
Increased thermal mass and thickness of walls without insulation
Large thermal storage capacity
Controlled power and limited openings
Control of indoor temperatures, envelope quality
Windows and openings recessed
Control of solar gains and natural lighting
External overhangs, planting, patio
Shading of the construction, better sun protection
Energy and Listed Buildings
ENVELOPE
IMPROVEMENTS
INTERNAL ENVIRONMENT IMPROVEMENTS IN H/M
SYSTEMS
INTEGRATION OF
RENEWABLE ENERGY
SYSTEMS
Replacement/repair/
improvement of windows
Reflective panels behind radiators
Modernization of lighting Solar panels for domestic hot water
Insulation of ceilings and
floors, internal walls
'Heavy' curtains to reduce heat loss
Geothermal heat pumps for heating / cooling
Photovoltaic’s integrated into roofs and sloping surfaces
Reuse skylightsInstalling ceiling fans Upgrading heating / cooling
systemUtilization of biomass
……AND CHANGES IN USER’S BEHAVIOR
Study Building
Located in the most central area
of Thessaloniki
Characterized as listed:
Gaz.128/B/23/3/1983
It’s a representative sample of
eclectism with interesting
architectural elementsThe intervention regards:1. Reconstruction/enhancement2. Configuration / renovationBuilt:1900-1906Saved from: Fire 1917, Earthquake
1978Owner: Jewish Community of
Thessaloniki, 1937
Building Characteristics
The access to the building studied is from Venizelou Street
The building has two floors
The connection of the basement to the
ground floor done through staircase
The appearance at Saint Minas street and the
entrance to the main staircase kept in moderately
poor condition, since the first intervention,1997
Interesting Architectural Elements
Major Interventions Can Be Done
Demolition of all additions, toilets and hygienic facilities, air
conditioning equipment, piping network, utilities
Demolition of loose coatings and carved decoration
Repair and restore of the original form of the building in Saint
Minas Street
Repair and configuration of ground floor, staircase, mezzanine
and 1st floor.
Checking and repairing of the roof
Installing of new internal network facilities
Installing of air conditioning system
Restoration of the facade
Results
Previous use (Hondos) Current use (Plaisio)
No insulation Insulation (stone wool)75-100kg/m3
Wooden frames/single glazed window(mezzanine & 1st floor)
Wooden frames /double glazed window (mezzanine & 1st floor)
Aluminum frames /single glazed window (ground floor)
Aluminum frames /double glazed window (ground floor)
Granite tiles (basement- ground floor)
Specific carpet, which Plaisio uses in its shops.
Parquet (mezzanine & 1st floor) Specific carpet, which Plaisio uses in its shops
13 Fan coils Roof Fan coil (water chiller)
Results
Purpose of engineers was the completion of the reconstruction of the building until late December 2011
Not possible due to problems(part of the load bearing structure need reinforcement) have arisen during the demolition process and the start of the process of reconstruction that caused new interventions
1. A lifting of concrete wall on the north side of the building for structural strengthening and security (due to the connection with Jewish museum)
2. A lifting of iron construction on the southwest side of the building for buildings equilibrium
3. Investing all of walls with a “cloak ’’ (iron construction and concrete)
Results
Assumed 2 scenarios :1. Demolition and New Construction2. Deconstruction and Renovation
1st Scenario 2nd Scenario
Demolition(5o% machinery & 50% manually)
100.000-110.000 € Deconstruction(100% manually)
20.000-23.000 €
New Construction
1.368.000 – 1.881.000 €
Renovation 1.000.000 €
Total Cost: 1.729.000 € Total Cost: 1.021.500 €
Generate: 50 tones of CO2 Generate: 15 tones of CO2