Fra idé til virkelighet. Sustainable refurbishment SURE Copenhagen, March 23 rd Kongsgård Borettslag Kristiansand, Norway

Transcription

1 Fra idé til virkelighet Sustainable refurbishment SURE Copenhagen, March 23 rd 2012 Kongsgård Borettslag Kristiansand, Norway

2 KEY INFORMATION Turnover 2010: NOK 3,1 bill. (EUR 414 mill.) Employees: 950 HAUGESUND Business segments: Infrastructure, building construction, building renovation, housing and property development. STAVANGER FORUS Kruse Smith was established in 1935 has and has since developed into a leading player in the Norwegian contractor and property market. Tomas Leire is the principal shareholder as well as the working chairman of the board. Approximately 10% of the shares are owned by Kruse Smith employees. ÅSERAL (ECO Bygg) ARENDAL LILLESTRØM LYNGDAL KRISTIANSAND Main office KRAGERØ

3 The builder Øvre Kongsgård borettslag Borettslag = cooperative housing society Residents own their own apartments The building, common facilities and outdoor areas are owned jointly by the residents of the housing society The housing society board is responsible for the day-to day running of the housing society, for financial matters and maintenance.

4 The builder Cooperative housing societies are often members in a Cooperative Housing Association. In this case Sørlandet Boligbyggelag Øvre Kongsgård Borettslag (the housing society) used Sørlandets Boligbyggelag (the housing association) as an adviser and as their representative in the early stages of the project. All final decisions on level of ambitions, investments etc. must be taken by the housing society.

5 Vestgavl Facade east OPPGRADERING AV BYGNINGER Utfordringer og muligheter Samhandling prosjektering - utførelse

6 End wall, south OPPGRADERING AV BYGNINGER Utfordringer og muligheter Gjennomføring Samhandling prosjektering - utførelse

7 Vestgavlwest Facade OPPGRADERING AV BYGNINGER Utfordringer og muligheter Samhandling prosjektering - utførelse

8 Early stages Poorly maintained building Leeks in the roof and major damages in the concrete. The housing society (borettslag) wanted to replace the windows and larger glass balconies. No focus on energy/energy costs from the start Sørlandets Boligbyggelag (the housing association) brought this focus into the project as an economic and technical adviser

9 Early stages Sørlandets Boligbyggelag goal: Rehabilitate 10 % of their (members) buildings to a «low energy standard» within a 5- years period Involved in research on decision making in cooperatives and condominiums. Information in general meeting at Kongsgård Borettslag made the case for energy To get a loan from the Norwegian State Housing Bank, environmentally sustainable solutions must be chosen.

10 Procurement Request for offers sent to 4 contractors Few details or preferred solutions mentioned in the documents Desired performance of the building described left it to the contractors to figure out how Energy: Low energy standard mentioned but no such standard existed at the time

11 Procurement 4 offers were made all quite different Kruse Smith chosen on best overall offer Luck? Meetings with the building committee Contract signed in October 2010

12 Vestgavl Building Removing balconies Samhandling prosjektering - utførelse Existing balconies were removed to eliminate thermal bridge and repair damages in the concrete.

13 Building New prefabricated balconies installed

14 Vestgavl Building Samhandling prosjektering - utførelse Extra insulation added to all walls (15 cm) Air/wind barrier installed

15 Vestgavl Building Samhandling prosjektering - utførelse New plates on all facades (Steni)

16 Vestgavl OPPGRADERING AV BYGNINGER Utfordringer og muligheter Building Roof, existing situation: 5-10 cm insulation cm mineral wool (blown in)

17 Vestgavl OPPGRADERING AV BYGNINGER Utfordringer og muligheter Building Samhandling prosjektering - utførelse New windows and doors on east facade. U-values 1.2 W/m2K Windows and doors on west facade kept as is.

18 Building Samhandling prosjektering - utførelse A balanced ventilation system with approx. 80% heat recovery installed New ceiling in corridors and parts of the apartments New lighting in common areas inside and outside (photocell)

19 Vestgavl Samhandling prosjektering - utførelse

20 What is achieved? Net energy demand: Estimated to 269 kwh/m2/year before refurbishment After refurbishment: Rough estimate: kwh/m2/year Additional cost for improving energy performance approx. NOK 7.5 mill (EUR 1.0 mill) Payback time for additional cost: Approx. 10 years

21 What is achieved? Emissions/environment: Depends on CO 2 factors for electricity Total reduction in CO 2 emissions of approx. 135 ton/year equals approx. 55 cars. 90% of the waste sorted into separate fractions on site

22 What is achieved? Increased sales value: Estimated NOK 150,000 (EUR 20,000) for apartments with new balconies Does the better energy efficiency result in higher value? Energy performance certificates might help

23 What is achieved?

24 Lessons learned / reflections Early phase tool needed Skilled craftsmen Communication with residents Sustainability

25 Involvement in the SURE project 2-3 workshops Gathered information Probably no direct influence on how the project was carried out Awareness on decision processes, roles and sustainability mindset in procurement/refurbishment projects in general

26 Looking ahead Growing market Vital to reach emission reduction targets Easily accessible and predictable instruments to release potential Green/sustainable = energy? BREEAM-Nor

27 Thank you for your attention! Samhandling prosjektering - utførelse