Reused, recycled and landfilled quantities with the diversion rate they produce.
Costing and commercial control. 5 questions answered below, each with the arithmetic behind it and the limits of what the tool decides. Open the Demolition Recovery tool.
Demolition produces material that is either recovered or lost, and the difference between those outcomes is decided before the building comes down. This tool counts what is there, applies recovery rates to each material stream, and reports the split between what can come back into use and what goes to disposal. The split is the useful output. A single diversion percentage hides the fact that steel is nearly always recovered and gypsum is almost never, so a building's recovery rate follows from its material mix rather than from good intentions. Where a material is hazardous, the tool does not rate it for recovery, because that is a different process entirely.
A building with four hundred tonnes of concrete, sixty of steel, thirty of timber and twenty of gypsum. At published rates, steel recovers almost entirely, concrete largely as aggregate, timber at a moderate rate depending on treatment, and gypsum rarely. The diversion rate works out high because the concrete and steel dominate by weight, which is exactly why a percentage alone can mislead a client or an assessor: the material that is lost is small by weight and large by volume and cost.
The materials present, the recovery rate for each, and the resulting split between recovered and disposed tonnage. It also derives a diversion rate from those figures and shows which stream contributes most to what is lost. Re use is kept separate from recycling, since a reclaimed beam and crushed concrete are different outcomes with different claims. The tonnage split is reported alongside, because a diversion percentage on its own can look excellent while a small, awkward stream is going to landfill in its entirety.
From published practice for each material stream, and they are rates rather than facts about a particular site. Steel is recovered at a high rate almost everywhere because its scrap value is real; concrete is recovered as aggregate where a crusher is available; gypsum recovery is limited by processing infrastructure. The rate you apply is an input, so a site with better arrangements can show it.
Because a single percentage hides where the loss is. A building that is mostly concrete and steel will show a high diversion rate and still lose every piece of its gypsum and most of its timber. Reporting recovered and disposed tonnage separately, per material, means the plan can target the stream that actually needs attention rather than celebrating the one that was never at risk.
Yes, as a derived figure with its basis shown. That matters because diversion rates are increasingly asked for in planning and in client sustainability reporting, and a figure presented without its material split and its rates cannot be checked. Presenting the split alongside the percentage is what makes the claim defensible.
No. Hazardous materials are flagged and excluded from the recovery calculation, because their handling is a separate regulated process. Asbestos, contaminated soil and certain finishes cannot be counted as recoverable, and including them in a diversion rate would misrepresent both the outcome and the risk.