Reusability and detachability in the Assessment Method
Reusability plays an important role in reducing the environmental impact of building materials. The National Environmental Database Foundation (NMD Foundation) distinguishes two forms of reuse in the Environmental Performance of Buildings Assessment Method (Assessment Method): unintented reuse, in which products are reused without a previously established plan, and inentended reuse, which is aimed at planned reuse with a focus on quality and design. Unintented reuse is valued using the reuse factor H (standardly set at 0.2), while intented reuse uses the quality factor K, which reflects the remaining quality of a product after the first phase of use as a percentage from 1 to 100.
The processing of materials at the end of their lifespan is described in processing scenarios, in which the degree of reusability plays a central role. Detachability is included in these scenarios. Detachability ensures that components can be disassembled without damage, which is a condition for future reuse. This is made clear in the Assessment Method by declaring end-of-life scenarios that take detachable designs into account.
In addition, the Assessment Method offers scope for new business models and initiatives, such as a take-back guarantee, with which manufacturers can demonstrably take responsibility for taking back and reusing products after their use phase. With this approach, the NMD Foundation offers clear guidelines for stimulating circular strategies and promoting reuse in the construction sector.
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