Sustainable building retrofits in Finland

Transcription

1 Sustainable building retrofits in Finland Yrsa Cronhjort Image Keijo Rasmus, NCC

2 The Challenge 40-50% OF HEATING ENERGY DEMAND 36% OF GREENHOUSE GAS EMISSIONS ENERGY EFFICIENCY REFURBISHMENT OF FACADES, BUILDING SERVICES POST II WORLD WAR SUBURBS FINLAND: EVERY 5TH APARTMENT 63% OWNER OCCUPIED

3 SOLUTION PREFABRICATION PROCESS THINKING INDUSTRIALIZATION

4 Tes Energy Facade Facade retrofit with prefabricated timber based elements PREFABRICATED FACADE ELEMENTS IMPROVED ENERGY EFFICIENCY DECREASED CARBONDIOXIDE EMISSIONS OF OUR BUILT ENVIRONMENT A CHANGE FROM SITE INTENSIVE WORK TO A MORE CONTROLLED ENVIRONMENT Faster retrofit process More reliable pricing Quality Capacity Safer working environment Less disturbance of living

5 TES manual pp 01_12 AUGSBURG lattkearchitekten ARGE Gumpp & Maier / Mayer Slide by Frank Lattke

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7 TES manual pp 03_62

8 AUGSBURG lattkearchitekten ARGE Gumpp & Maier / Mayer

9 Image Frank Lattke ARGE Gumpp & Maier / Mayer

10 AUGSBURG lattkearchitekten ARGE Gumpp & Maier / Mayer

11 AUGSBURG lattkearchitekten ARGE Gumpp & Maier / Mayer

12 TES ELEMENTS IMAGE 1 TES ELEMENT EXAMPLE (ACCORDING TO FINNISH REGULATIONS) soft glass wool carpet glued to board, softwood plywood or OSB board 9mm, airtight paper strengthened with mesh web girders + thermal insulation (amount according to need, here 300 mm), wind barrier gypsum board 9mm, air gap, facade cladding

13 TES manual pp 04_117 Image Frank Lattke

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16 Digital workflow and prefabrication Complete regeneration of the building appearance Significantly improved energy efficiency Improved comfort for end-user Independent, self-load bearing building facade > opportunity for adding value to the facade Image Yrsa Cronhjort

17 the functionality of both apartments and the building can be improved new outdoor space, semicold space or heated space new external walls balconies can be thermally insulated and integrated to interior spaces heated or semicold living area can be increased even up to 20% (example below) In case a three storey building has a ground floor that could be redeveloped, the maximum new floor area would be about 25% Frank Lattke

18 Image Leeni Harno Harno, L., Elävä lähiö houkutteleva asuinympäristö Asukas- ja käyttäjälähtöinen lähiöuudistussuunnitelma Kouvolan Kaunisnurmeen, Master thesis, Aalto University School of Arts, Design and Architecture, Department of Architecture, 2013.

19 13 master theses tutored and analysed Potential for infill even up to 80% Increased efficiency rates % Majority 3-story apartment buildings, typically added to with 1-2 floors (11/13) Lean process through the use of prefabricated modules Limits: circulation systems, parking space Environmental benefit: No new net land use or take Tomi Tulamo

20 Case Saturnuksenkatu Riihimäki Image Simon le Roux, Aalto

21 CONCRETE SANDWICH FACADE ELEMENTS 1970 S 80 mm concrete 90 mm thermal insulation 40 mm concrete U=0.53 W/m 2 K

22 Image: Kimmo Lylykangas

23 Images Kimmo Lylykangas TES elements in production INNOVA pilot project Riihimäki, Finland

24 Image Simon Le Roux, Aalto

25 Image Simon le Roux, Aalto.

26 8. Completion of facade, new balconies 7. Facade elements mounted 6. TYVEK- air tight layer 5. Soft adaption layer 4. Old thermal insulation and roof demolished 3. Outer layer of concrete demolished 2. Balconies demolished 1. Building before retrofit

27 IMAGE KIMMO LYLYKANGAS Images Kimmo Lylykangas

28 Image Tomi Tulamo

29 Case Virkakatu Oulu

30 Image Arkkitehdit M3 Oy.

31 Image Simon le Roux, Aalto. 31

32 Image Simon le Roux, Aalto.

33 Retrofit facade: TES (Oulu) U= cm

34 Pohjois-Suomen opiskelija-asuntosäätiö, NCC Rakennus Oy, Arkkitehdit M3 Oy, Insinööritoimisto Putkonen Oy, Taltekon Oy, Oulun Sähkö-Aika Oy, Fidelix Oy, Suomen Rakennustuote Oy, Aalto University Jaakko Kallio-Koski M3 Architects

35 YRSA CRONHJORT