Norgeshus AS is the developer of the Norgeshus franchise concept in Norway, which consists of approximately 155 independent dealers/contractors around Norway, who market and build the houses in our housing catalogues. Nupen is one of our best-selling models in our housing catalogue. To achieve lower CO2 emissions when a customer works with one of our franchisees to build Nupen, we have selected building materials with documented lower greenhouse gas emissions than other market alternatives. We used EPDs to verify the emissions data for these materials. Material categories for which we have been able to make such choices are EPS, XPS, cross-laminated timber, mortar and moisture barriers. Although the calculation of LCAs is not a requirement for detached houses, our own engineer and architect office has calculated the LCA according to the guidelines and requirements in the Norwegian building code (TEK17).

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 products stage and replacements.
Since neither B6 or B7 are included in the assessment, the second figure only shows impacts from the materials, phases A1-A4, and B4.
In the third figuret, Upfront includes A1-A4, scenarios include B4, and D is shown separately, had it been included in the assessment.

GWP / reference area [kgCO₂e/m² reference area]

Material inventory: All materials
Life cycle modules: A1-A4, B4 

Foundations include the ground floor structure, internal walls include floor slaps, and interior finishes include walls finishes/coverings, flooring and ceilings.

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.

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 from Norgehus: Although we are able to use product-specific emissions factors from EPDs for approximately two thirds of the unique building supplies in our catalogues, we have used generic emissions factors from Boverkets database for all of these hotspots.