A-19 Water and energy demand during construction – complete LCA

Aspect

A-19 Water and energy demand during construction – complete LCA

Description
This aspect concerns the water and energy demand on the construction site. Energy and water are consumed both for the construction of the building and for the workers’ accommodation.

Related study objective

stand-alone LCA comparative assertion

Related study phase

goal and scope definition inventory analysis (LCI) impact assessment (LCIA) interpretation reporting

Relevant for

new buildings existing buildings building products screening LCA simplified LCA complete LCA
Provisions The water and energy demand may be included in complete LCA if it is relevant for the goal and scope of the study (e.g. a construction company might have more interest than a building designer in this aspect).Water and energy consumption on the construction site should be considered for a complete LCA, if it does not fall under the cut-off rules.
Rules from:
EN 159788.5 Scenarios for the construction process stage (Modules A4-A5)

EN 15804: 

6.3.4.3 Construction stage

Guidance
The practitioner should use detailed calculations based on the amount of water and energy consumption from meter readings on site. These experimental data should be linked to LCA data covering upstream (potabilization) and downstream (waste water treatment) processes for the water-related impacts, and upstream processes for the energy consumption (supply) for complete LCA. Refer to the cut-off rules guidance if relevant.

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