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""Photos by AFE Boligprosjekt 2020 AS
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22 Fyrstikkbakken

Norway

22 Fyrstikkbakken, Norway

Building use 
Residential 
Stories above ground 
4 buildings, 8,9,10 and 9 floors 
Location 
Basement area 
2476 m2   
Client 
AFE Boligprosjekt 2020 AS, Birk & co and AF Eiendom 
Structural system 
CLT, Concrete and steel 
LCA consultant 
LINK Arkitektur 
Façade type
Painted wood 
Year of completion 
2024 
Roof type 
Flat roof, CLT slab, Roof terrace 
Reference area 
12,699 m(useable floor area) 
Heat demand /source 
District heating and solar cells 
The project is part of the FutureBuilt program, which has the goal to reduce CO2 from energy use, materials and transportation with 50%. It was designed to be an eco-friendly residential densification near public transport hubs, with sharing and joint use as guiding principles. The location of the project was central to the low CO2 emissions. The main building materials are cross laminated wood (structural system) and low carbon concrete (basement and first floor). The energy use of the buildings is low due to the insulation in the outer walls, decentralized ventilation, and use of coal filters in the kitchen ventilation (requires less extraction of air). The project has proved to be a model project in terms of shared use, sustainability, future living forms and green mobility. The homebuyers range from 22 to 82 years old and have in common is that they support the idea of sharing and community. The project hopes to show one can achieve lower CO2 emissions by living in a smaller individual space and sharing common spaces with neighbours, but at the same time increase the quality of living. The project has used LCA analysis from the beginning in planning and choice of materials.

Assessment method

LCA scheme compliance 
FutureBuilt 
LCA tool version 
One Click LCA 
Life cycle stages included 
A1-A5, B4, B6, B7, C3, D 
Material emission data 
EPDs 
Material decarbonization scenario 
Energy calculation method 
Energy simulation method for the TEK building code 
Energy, dynamic scenario
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LCA results: Building elements

Life cycle modules 
[kgCO2e/m2 reference area * year]
Type of emissions
%
When do emissions occur?
[kgCO2e/m2 reference area * year]
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""LIFE CYCLE MODULES  [kgCO2e/m2 reference area * year]
""TYPE OF EMISSIONS, %
""WHEN DO EMISSIONS OCCUR?  [kgCO2e/m2 reference area * year]
The system boundary includes the product, use and end-of-life stages. 
The material inventory also includes solar cells. In the second figure, Operation includes B6, while materials include A1-A5, B4, C2-C4. Be aware that B6 contain electricity, district heating and solar power.
In the third figure, Upfront includes A1-A5, scenarios include B4, C2-C4, and D is shown separately, had it been included in the assessment.

LCA results: Building elements

GWP / reference area [kgCO2e/m2 reference area]

Material inventory: All materials 
Life cycle modules: A1-A5, B4, C3 
Interior walls are included finishes, Floor slabs include everything from flooring to ceilings, External walls, include the facade cladding, roof structure include external cladding. Solar cells were also calculated (A1-A5, C3), but they are not shown in figure, there impact is 614 kgCO2eq./m2
Building element quantity / reference area [kg building element / m2 reference area]
GWP of building element / building element quantity [kgCO2e / kg building element]
Quantity/Area GWP/Quantity

Material inventory: All materials
Life cycle modules: A1-A4, B4
Building element quantity per building reference area is a measure for the material intensity, while element impacts per element quantity is a measure for the elements’ carbon intensity relative to their weight.

LCA results: Products

Product quantity / reference area [kg product / m2 reference area] 
GWP of product / reference area [kgCO2e/m2 reference area] 
Quantity/Area GWP/Area

Material inventory: Top 10 products with the highest impacts
Life cycle modules: A1-A4, B4
Construction product quantity per building reference area is a measure for the material intensity, while product impacts per building reference area is a measure for carbon intensity.
Note that the reference area in this case I the usable floor area.