Screed Systems Using Recycled Aggregate

Recycled aggregate used in screed formulations typically originates from processed construction and demolition waste or other reclaimed mineral sources, graded and treated to meet the consistency requirements of a flowing screed mix. Manufacturers who offer these products publish their own technical data confirming compliance with relevant standards, and this documentation should be reviewed alongside any sustainability claim before specifying.

As with any proprietary product, performance depends on following the manufacturer's mixing, pumping and curing guidance precisely, since recycled aggregate content can alter workability slightly compared with a conventional mix. Pump settings and placing technique may need minor adjustment on site to achieve the same finish quality expected from a standard mix.

Specifying a recycled aggregate screed shouldn't mean compromising on the strength class or drying profile the project actually needs. The right approach is to establish the structural and thermal requirements of the floor first, then identify whether a suitable recycled aggregate product exists that meets those requirements, rather than working backwards from the sustainability goal alone.

On projects targeting specific sustainability assessment credits, it's worth confirming with the assessor or design team exactly what documentation will be needed from the screed manufacturer to evidence recycled content claims, since assessment schemes often have precise evidentiary requirements that need to be gathered during the works rather than after completion.

Not every supplier or region has ready access to recycled aggregate screed products, and lead times can sometimes be longer than for standard mixes depending on the manufacturer and current demand. Confirming product availability early in the programme, rather than assuming it can be sourced at short notice, helps avoid delays once other trades are scheduled to follow on.

Cost differences between recycled aggregate and standard screed vary by product and supplier, and are worth clarifying at quotation stage so the sustainability benefit can be weighed against any additional cost or lead time as part of the overall project decision.

Where a project is pursuing credits under a building sustainability assessment scheme, evidence of recycled aggregate content typically needs to trace back to the manufacturer's own technical statements, batch records, or third-party verification where available. Gathering this evidence during the works, rather than trying to reconstruct it later, makes the assessment process considerably smoother.

We keep records of the specific products used on a project where recycled content forms part of the sustainability case, and can pass on manufacturer documentation to the design team or assessor as needed to support the wider evidence pack for the building.