Environmental Impacts of Multi-Storey Buildings Using Different ...

- 70 -100908070GWP (t CO2 equiv.)6050403020100CeilingDoorsExterior WallsFoundationsGround Floor SlabsInterior WallsLouvresRoofStairsStructureSuspended FloorsWindowsBuidling typeConcrete Steel Timber Timber+Figure 6.9: GWP (tonnes CO 2 equivalent) estimated for each maintained building component, comparedbetween building typesThe TimberPlus building has the greatest impacts (embodied energy and GWP) formaintenance for three of the building components (interior walls, ceilings, and louvres).Despite this it still has the lowest total impact (Figure 6.10Figure 6.10Figure 6.10 and Figure6.11Figure 6.11Figure 6.11). This is partly due to the lower embodied energy of the woodenwindow frames, compared with the aluminium window frames used in the other buildings. Itis worth noting that the impacts from the Steel and Timber buildings from maintenance arevery similar because both buildings have the same materials for interior walls, ceiling, andwindow frames. If the same ceiling is assumed for all four buildings, the maintenance relatedGWP for the TimberPlus building would reduced by approximately 25 tonnes of CO 2equivalents.2,5002,000Energy (GJ)1,5001,0005000Concrete Steel Timber Timber+Buidling type