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Symbiont

New technology

Facaderefurbishment

THINK GLOBAL ACT LOCAL SYMBIONIZENOW!

By building new living units on existing buildings, concept OnTop opens up new �nancial resources. A profound refurbishment of the existing building can be �nanced without raising the rent excessively, thus avoiding gentri�cation. The new residents of the symbionts enjoy living in a sound and grown urban neighborhood, while the local residents enjoy the amenities of the refurbis-hed existing building. The concept is suitable for municipal and co-operative housing associations as well as for condominium owners' associations, since it allows develo-ping further the existing building in an economically, ecologically and socially attractive way.Of course the symbionts are built of ecological and recyclable

materials and constructions that can be dismantled. But OnTop is more. It brings together the three dimension of sustainability – economy, ecology and social issues – in a holistic approach: By creating new living space where it is needed, it opens up new �nancial resources that are used to enhance the existing buildings; so they get more energy ef�cient, produce renewable energy on-site and get more age-appropriate; without having to raise the rent excessively, which would cause gentri�cation. Doing so, concept OnTop contributes to the sustainable develop-ment of cities – and it can be applied now!

New and highly energy ef�cient living space is created with the symbionts. The existing building is refurbished, thus minimizing its energy demand. The remaining energy demand is covered mostly by renewable energies on-site: Heat is generated with solar collectors, but also with a heat pump that uses exhaust air from the existing building and ambient air as heat sources. The existing condensing boiler is used to cover peak loads. In the medium to long term it can be run with power to gas. Electricity is genera-ted with photovoltaic. A high share of internal consumpti-on reduces the network load. The building no longer is only consumer, but also producer and storage of energy.

New living space is created by adding living units on top of an existing building, the so called symbionts. The roof of the symbionts is used to produce solar energy with building integrated solar systems. OnTop is not a modular construction system, but a concept. According to the very situation the symbionts can vary in size, shape or appearance. OnTop has to be adapted to every speci�c building project. The economical, technical and social characteristics of the city, the neighborhood, the site, the existing building, the owner and the residents have to be taken into account.

Wood panel construction has a long tradition and is well-de-veloped in Germany’s prefabricated housing industry. OnTop makes use of the existing know-how and the advantages of this construction method: Prefabrication in the plant ensures high quality of the elements and a high degree of cost certainty. Just-in-time delivery and a short construction time on-site reduce the disturbance of residents and city life. And the lightweight structure does not overload the existing building structure.

Urbanization is a mega trend – but it is not the same every-where. In Frankfurt, like in other German and European cities the population is growing and new living space is needed. But it is crucial not to forget about the existing building stock and the residents either.

To cope with the two big challenges ahead – energy transition and demographic change – the existing buidling stock has to be refurbished in order to get more energy ef�cient and more age-appro-priate. But refurbishmentoften leads to higher rent, thus causing gentri�cation.

Concept OnTop is a solution for creating more living space and enhancing existing buildings: New living units – we call them symbionts – are created on an existing building and put on the market. The �nancial bene�t from selling or renting them is used to refurbish the existing building.

The symbionts are built withoutfurther land sealing. They arebuilt where many people wantto live and where technical andsocial infrastructure is alreadyavailable. The existing buildingis getting much more ener-gy-ef�cient and age-appropria-te – and renewable energy is produced on-site.

OnTop can be adapted to different situations. The economical, technical and social characteristics of the existing building, the site, the neighborhood, the owner and the residents have to be taken into account. According to the very situation the symbiontscan vary in size, shape orappearance.

The renewable energy produced on-site changes the buildings’ role in the energy network: from consumer only, to an intelligent node which produces and stores energy also. It can also balance the temporal mismatch betweenproduction and consumption by shifting from electricity to heat.

OnTop contributes to a sustain-able development of the city. And since all the technology and knowledge is already available on the market: It can be applied now – and not only in Frankfurt, but in every city under settlement pressure.

Please �nd more informationunder www.ontop2014.de

ENGINEERING AND CONSTRUCTIONTransferring and enhan-cing know-how

MARKET VIABILITYTake where it is possible and give to where it is needed

ENERGY EFFICIENCYMinimizing demand, maximizing use of rene-wable energies on-site

SUSTAINABILITYDeveloping the existing further

ARCHITECTURECreating an identity for the site

Concept OnTop

net zero energy

High feed-in Low feed-in

status quo

Low internalconsumption

Low con-sumption

High internalconsumption

High increasein ef�ciency

Highconsumption

existingbuilding

THE ONTOP ADVANTAGE:High reduction potential

instead of small plus

Plus energy buildings on a green�eld site

Symbionts OnTop of an existing building

THE ONTOP ADVANTAGE:Short payback time

10

10 Mio. €

5 Mio. €

20 30 40 YEARS

OnTop

Refurbishment

No actions

Ad

olf-Messer-Stiftung

Förderverein der FH FFM

Stiftung Stæ

dte für Menschen

ICE/TGV

Frankfurt – Paris

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JUN

E 28. –

JULY 14. 2014

Informations by the team OnTop

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Visit the �rst

realization of

concept OnTop!

2015Th

e imp

lementation starts!

Mousonstraß

e 3560316 Frankfurt

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cen

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