|Aspect||B-11 (Buildings) / B-06 (Products) Definition of the service life of a building product|
||The lifespan, or service life, of building components and elements is usually defined as the period of time during which their performance meets or exceeds initial requirements. More detailed definitions can be found in reference work (e.g. the ISO 15686 series [ISO 15686] and [Guidance Paper F 2004] concerning the Construction Products Directive). Service life depends on many parameters, and is one subject of the ISO 15686 series.|
Related study objective
|☒ stand-alone LCA||☒ comparative assertion|
related study phase
|goal and scope definition||inventory analysis (LCI)||impact assessment (LCIA)||interpretation||reporting|
|new buildings||existing buildings||construction products||screening LCA||simplified LCA||complete LCA|
|Provisions||The service life of a product or building component has an influence on several aspects of the use stage of building LCA:
The service life of a product or component is influenced by many parameters, notably the indoor and outdoor environments, maintenance level, design of the product, etc. (see ISO 15868-8 for further information). When providing information related to service life for an EPD, ISO 15804 requires that the intended use and in-use conditions of the product or system be specified and documented (EN 15804, Annex A).
When developing LCA at the building scale on the basis of several EPDs, it should be verified that the declared service lives and in-use conditions are compatible with the specifics of the building (notably its location and maintenance scenarios).
Only end of life related to loss of performance should be taken into account in the base-case scenario. End of life related to obsolescence (e.g. replacement of the product system by a newly developed or more efficient one before the end of life) may, however, be assessed in a complementary assessment. For more information on obsolescence please refer to ISO 15686-1 (Chapter 7).
8.3 Time related characteristics
8.6.3 Scenarios for maintenance, repair, replacement
||The RSL could be based on empirical, probabilistic or statistical data, but should always take into account the intended use (description of use) as described in ISO 15686-1, -2, -7 and -8 [EN 15804, Annex A].RSL should be determined on the basis of:
It is expected that some service life data may be missing for the assessment at the building scale. In this case, several additional sources may be used to determine the service life of the product or system:
For building products, it may be useful to use conventional values for the respective product category (e.g. in a national context or within an EPD programme), if available. For example, the EOTA guide in Europe states some commonly agreed service lives:
Refer to the aspects ‘Distinction between Modules B2, B3, B4 and B5’ and B-14 ‘Replacement frequency’ for further guidance on how to interpret and use RSLs for product and building LCA.