Tenderer must have a good Strategic Approach for Reuse of Materials
- Design-Build Contracts
- Award Criteria
The production of construction materials accounts for a large proportion of the energy and climate footprint associated with construction.
Relatively new buildings are frequently demolished and much from these buildings could potentially be reused. Reusing materials contributes to the circular economy and reduces energy and greenhouse gas emissions from material production. Reuse also reduces the need for waste management. Reusing construction materials in the immediate vicinity of the relevant construction also reduces the need to transport waste and construction materials.
In their tenders, contractors must create a plan, maximum three pages long, containing strategies and measures for reusing materials from other buildings that have been or will be demolished/rehabilitated. The type of materials and quantities that will be reused must be specified.
The environmental benefits and quantities reused will be assessed in the evaluation.
As a minimum, the plan must include:
- Strategies and specific measures for how materials available for reuse will be used in the project and the building, specifying quantities and environmental benefits.
Documentation of the Requirement Specification:
The tenderer should compile a programme on maximum 3 pages, comprising strategies and measures for reuse of materials. The programme must minimum include: strategies and concrete measures for how available reusable materials would be used in the project and the building, including amount and environmental benefits.
When these are used as award criteria, the recommendation is that you communicate to the market early on that you wish to reuse materials in the project. If you know of plans to demolish or rehabilitate a building in the vicinity, this should be stated in the tender documentation.
The assessment table 4.61.1 will be added to the tender documents.
In the evaluation, the climate benefits and quantities will be assessed based on the stated quantities of materials and an assessment of the extent to which the reuse of construction materials reduces total greenhouse gas emissions. For quantity, an assessment will be made of how much (m, m2, m3 or tonnes) reusable materials will be used in the project.
The evaluation will involve the evaluators reading the tenderer's plan and scoring it in Table 4.61.1. Quantities will be assessed by comparing the quantities from the various tenderers. The assessment will be based on the straight-line method where the largest quantity in a category of construction materials (column 1) scores 5 points. Zero points if there is no reuse.
|Construction materials from other demolished or rehabilitated buildings that can be reused:||
Environmental benefits, 1-5
1 point minor climate benefits
Quantity, 1-51 point low quantity
5 points high quantity
Score =climate benefits x quantity
|Prefabricated concrete elements, tonnes||1 - 5, for example 4||e.g. 5*4 = 20|
|Steel beams and steel cross-sections, tonnes||4||1 - 5, for example 3||e.g. 4*3 = 12|
|Structural timber (laminated wood, solid wood and construction timber), m3||4||0|
|Brick and other facade materials, tonnes||4||0|
|Windows/glass panes, m2||4||0|
|Ventilation ducts, tonnes||3||0|
|Corrugated sheets, m2||3||0|
|Fittings, hinges, tonnes||0|
|Total score||e.g. 32 poeng|
Guide from SINTEF Building and Infrastructure on reuse (2012):
This report starts with a general section that describes the legal framework and critical points for reuse, with discussions about, and proposed solutions for, these challenges. Thereafter, eight reuse scenarios are described for relevant groups of materials in which the choice of materials is based on the possibility of achieving major environmental benefits. The knowledge presented is based on the earlier work and experiences of the parties involved.
The purpose of this report is to analyse and discuss challenges with respect to further developing the field. The core question is, which products, overall, represent the lowest hanging fruit and might therefore be important to focus on. One long-term goal of this work is help overcome some of the obstacles we face today so that reuse can become a cost-effective and practical alternative to new materials in the market, both internally in upgrading projects and through third-party suppliers