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Mar 30, 2015
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The Company
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1835 Cement and lime factory Weizen
1955 Start of organic render production
1965 First EWIS developped
1992 Sto AG is floated on the stock exchange 1996 StoCretec becomes separate subsidiary2000 Takeover of Shanghai Dinova Ltd., China2001 Acquisition of ispo GmbH, Kriftel
today 4000 employees18 international subsidiaries1 mission
From lime factory to Sto brand
Building with Concience
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Sto AG‘s Mission statementThe basis of the company’s guiding principles
Maintaining the value of old and new buildings is a permanent problem for building owners, investors and users.
In its quest to solve this problem, Sto researches, develops, produces and markets product systems and services, with the aim of maintaining and improving the substance and functions of walls, ceilings and floors, and providing long-term protection from damage.
This functional area of work is accompanied by services relating to the aesthetic design of buildings in terms of colour and structure.
Sto wants to act as a pacemaker and play a leading role in helping to ensure that the world in which we live is designed in line with environmental requirements and our needs as human beings. We therefore collaborate with like-minded customers and partners.
Our declared aim is to comply with our company’s guiding principles in our dealings with all those involved in the building sector. Sto’s mission statement can be summed up in three words: Building with conscience.
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External Wall InsulationSystems
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Introduction
Why thermal insulation?
Reserves of fuel materials for heating (e.g. fuel oil, gas, coal)
are not unlimited and not substitutionable
Reduction of toxic emissions e.g. CO2 (hothouse effect)
Sto façade insulation systems account for around
35 billion litres of heating oil thus avoiding the emission of
over than 110 million tons of CO2
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External Wall Insulation Systems
Advantages of external wall insulation systems Energy saving (up to 60%) Environment: less toxic emissions, less fuel materials. Elimination of thermal bridges.
(Ceilings, geometrical thermal bridges, etc.) There, where internal insulation now is existing:
No condensation anymore in the wall construction. Reduction of temperature tensions. Increasing of the wall surface temperature inside.
No risk anymore for mould spots. A better using of the heat accumulation capacity. The facade is protected against heavy raining. A new optical attractive facade.
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StoTherm Classic
Benefits of the Sto ExternalWallInsulationSystem
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Substrate: Structural wall,brick, block, timber frame etc
Insulation board
Reinforcing coat + mesh
Sto decorative finish render Acrylic/Silicone
StoTherm Classic=
Organic
Organic
Organic
+
+
System Concept
Fixing
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↑ thickness ↓ density ↓ thermal conductivity
Insulation productExpanded Polystyrene, EPS
↑ insulation quality
high crack resistance high resistance to mechanical stress low coefficient of thermal elongation permeability to CO2 and to water vapor
elasticity hydrothermal behavior
↑ long term durability
EPS
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Insulation Board Types used for Insulated Render Systems
85 15PolystyreneOthers
EPS -largely
preferred choice (min. wool, PUR,
foamglas, corc)
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Calculation of the U-value:Wall structures are usually composed of several layers (internal plaster, brickwork, external plaster and/or thermal insulation, wall finish etc.). Each layer of material has a thickness d [m] and a own thermal conductivity coefficient [W/m.K].
The thermal resistance (d/)of each layer of material is added to the internal and external surface resistances (1/). The sum is the total thermal resistance (R) for the total (wall) construction. The inverted value of this figure is known as the total thermal transmittance: U-value.
+ + U-value: the smaller, the better + +
INSULATIONTotal Thermal Transmittance U [W/m².K]
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Wall constructions (examples):
Old dwelling houses: U = 1,00 - 1,50
Not so very old dwelling houses: U = 0,70 -1,00
New dwelling houses: U = 0,35 - 0,40
Low energy dwelling houses: U < 0,35
INSULATIONTotal Thermal Transmittance U [W/m².K]
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U = 0,37 W/m².K
0,30 m0,10 m
EPS
As separate materials:
0,40 m
Concrete 0 U = 3,20 W/m².K U = 0,36 W/m².K
Both materials inone system:
INSULATIONTotal Thermal Transmittance U [W/m².K]
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Wall thickness: 30 cm
Concrete 1,76 2,94
0,43
Solid brick 0,64 1,56 0,38
Lime sandstone 0,48 1,250,36
Light-weight brick 0,55 1,400,37
withoutinsulation
with8 cm ins.
U-Values,with and without insulation
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wall construction surroundings climatic zone and architectural design etc.
Energy savings per m2
Rough estimation: 50-70% depending on...
oil and electricity prices !!!
elimination of thermal bridges → 20- 25% contribution in energy savings
↑ actual savings per year by using EWIS
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What are the advantages of EWIS?
Passive house:Ottbergen
U value: 0,127 W/m2K
EWIS:StoTherm Classic300 mm
Active heating:None.
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Base Coats
Their vital role for
Long Term Durability
and Economy of EWIS
the Major Benefit of
StoTherm Classic
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Stress for Base Coats
Sun
Rain
Temperature°C
Insulation
Tensions= Pull/tensile forces
Wall
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Base Coats for EWISGeneral Requirements
excellent moisture protection high crack resistancy and good elongation sufficiant elasticity minimizing application difficulties high impact resistancy Long term stability of binder, no influence of
ingredients on system safety (alkalinity etc.)
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Sto cement free
Cementitiousslightly improved
Cementitioushighly improved
0,00% 0,50% 1,00% 1,50% 2,00% 2,50% 3,00% 3,50%
Dehnung bis zum ersten sichtbaren Riß
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Expansion before first visible crack [%]
DurabilityCrack Expansion Testing
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0,0 1,0 2,0 3,0 4,0 5,0 6,0 7,0 8,0 9,0
Energie bis zur oberflächlichen Beschädigung in Joule
Organic system
Mixed system
Cementitious system
(Sto Armat Classic cement free)
(Cementitious reinforcementand top coat)
(Inorganic reinforcement,organic top coat)
Durability Pendulum Impact Testing
0.0 2.0 4.0 6.0 8.0Energy before surface damage [Joules]
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Cementitious System StoTherm Classic
Durability Pendulum Impact Testing
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StoTherm Classiccement free
Mineral Systemcementitious
Impact ResistancyTested by Nature
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The coefficient of thermal elongation T indicates how much 1 meter a material expands if there is a temperature difference of 1K .
(T depends on the macrostructure of the building material)
L = L x T x K (m)
Coefficient of Thermal Elongation T
L Change in Length (m)L Length (m)T Coefficient of thermal elongationK Temperature difference
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Typical values:
Concrete 10 x 10-6
Steel 12 x 10-6
EPS 60 x 10-6
Mineral wool 1 x 10-6
Aluminium 24 x 10-6
Mineral plaster 10 x 10-6
Organic plasterStoVerotec Board 8 x 10-6
Coefficient of Thermal Elongation T
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Example:
1. Railway Munich - NürnbergTrack length: 199 km = 199.000 mCoefficient of thermal elongation steel: T = 12 x 10-6
Temperature difference summer - winter: 50 KLength change: 119,4 m
2. Brick wallLength: 9 mCoefficient of thermal elongation brick: T = 12 x 10-6Temperature difference summer - winter: 50 KLength change: 5,4 mm
Coefficient of Thermal Elongation T
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The ideal EWIS Base CoatCharacteristics Profile of organic compounds
best elasticity best crack resistance highest impact resistance best moisture
protection best weather resistance,
even without finish
safest to apply, also at difficult weather conditions
fastest curing most economic long term durability
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Colour & TextureFinish Renders
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Finish VariationsStolit with many different textures
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Finish VariationsSto Nivellit as smooth option
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Finish plasters
Acrylic binder Stolit K/R, Superlit,
Silicone binder StoSilco K/R, MP
Characteristics
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Acrylic plaster benefits
highest elasticity widest choice of colors best safety coefficient easy application and structuring
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Silicone plaster benefits
excellent water repellent effect together with excellent water vapour permeability
excellent dirt resistance mineral colour selection wheel
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Finish Renders Stolit Benefits
Homogeniously tinted Ready to apply, no mixing on site Easy application and structuring Regular drying without patches No efflorescences No egalizing paint finish coat No additional primer on Sto Armat Classic Best adhesion Best stability of colour due to pigments and binder Best long term stability Best mechanical resistancy and cleanability Best choice in structures
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Economical Considerations on Base Coat Selection
+ safety for free !
Material
economy of materialless worksing steps
economy of time
StoTherm Classic
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StoTherm ClassicGeneral Benefits
Maximum of security by selection of "state of the art" product components
Outstanding performance and excellent product experience makes Classic a the bench mark for others
Cement free fiber reinforced ground coat gives maximum of elasticity and impact/crack resistance
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StoTherm ClassicGeneral Benefits contd.
Ready-to-apply products make application easy, quick and safe, even at bad weather conditions
Weather resistant, cement free, tintable ground coat needs no additional primer, which is an important economy
Organic finishes give a maximum in weather protection, durability, color and structure choice
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StoTherm Classic
examples….
Case Study
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Energy savings studyStoTherm Classic - Athens Imperial Hotel, Greece
Hotel renovation StoTherm Classic Organic compounds, ready to use Result= 50% reduction in U -value Energy savings per year: m2=11.95 €/m2
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Office building Cecile, Greece
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Office building Cecile, Greece
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Latsio Hospital, Greece
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Athens International Airport, Greece
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Private residence, Greece
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Hotel King George II, Greece
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Hotel Semiramis, Greece
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Hotel Sitia Bay, Crete, Greece
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Hotel Plaza resort, Greece
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Hotel Larissa Imperial, Greece
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Hotel Eva Palace, Greece
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Private residence, Greece
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Netherlands
Residential Complex in Amersfoort
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France
Quartier Nucleaire, Mulhouse
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Czech Republik
School in Borovany
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Germany
Officer Homes, Schwerin
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Kasachstan
Rachat Palace Hotel
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Austria
Office Building, Sitten
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Germany
Public Housing Refurbishment
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Great Britain
Royal Opera House, London
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Japan Farmhouse Rankosi, Hokkaido