B-03 Maintenance – product LCA

Aspect B-03 Maintenance – product LCA
Product LCAs can have different system boundaries, which can include or exclude maintenance.

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 construction products screening LCA simplified LCA complete LCA
Provisions The consideration of maintenance is subject to the study type definitions. For complete LCA studies, the aspect should be considered in line with the cut-off criteria; for screening and simplified LCA studies, this aspect is optional.
Rules from:

EN 15804 General B1-B5 Use stage information modules related to the building fabric
6.3.5 Criteria for the exclusion of inputs and outputs
For many construction products, no predictable maintenance procedures exist during the product life cycle, e.g. for the studwork in an internal wall or a concrete floor structure. However, for some products, such as flooring, regular cleaning is required. Many products (e.g., windows, internal walls, ceilings) also require regular surface maintenance, e.g. repainting.For complete LCA studies: Maintenance should be considered where it is likely to have a significant impact based on the cut-off rules. Specifically, if maintenance is likely to have more than 5% input by mass of total inputs over life cycle stages B1–B5 it must be considered.Where it is unclear whether an activity should be considered as maintenance, repair, replacement or refurbishment, the most suitable module should be chosen and justified (refer to aspect B-32 ‘Distinction between Modules B2, B3, B4 and B5 for further guidance’).

Maintenance processes at the product level should be considered on the basis of the most likely scenario or scenarios (e.g., Scenario 1, window in Finland vs. Scenario 2, window in Slovenia, other aspects being the same, e.g. orientation, exposure etc. – the likely recommended intervals for repainting the same window will vary depending, on this scenario).

See the section 3.4 on service life planning for guidance on the development of scenarios.

In cost terms, regular maintenance visits to check equipment can be significant, although the only environmental impact is associated with the transport of staff to the site. See aspect A-02 (transport of staff) for more information.

All processes B1 to B5 should include the impacts associated with the process. For maintenance, the impact of producing and transporting the materials used, the impact of the maintenance activity, e.g. water and energy used, and the impact of disposing of any waste produced, e.g. waste water from cleaning, need to be considered. These impacts may be aggregated, and reported as a single process, or broken down and reported separately to enable alternative scenarios to be generated. This may be helpful where there are significant variations between scenarios.

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