Recycled glass and resin composite worktops

At a glance

Qualitative only. Our materials pages for two such products, trade guides (retail-level, figures conflict, none used) and the TL-FLO-29 worktop sheet. No standard written for these composites was found. The maker confirms every row.

Three families, and the question that separates them

These are made-up surfaces: aggregate bound into a slab or sheet. Three families turn up in specifications, and the first question is always what binds the aggregate, because that decides most of what follows.

• Recycled glass in a cement binder. Glass sorted by colour, crushed and graded, combined with a cement-based binder and pigments and cast into slabs. The glass gives colour and depth; the cement gives body and a matt ground. It is a cast surface with colour through the thickness, not a printed layer (our materials page).
• Recycled glass in a resin binder. The same glass in a polymer. Trade guides describe it as lighter and non-porous, with a heat limit set by the resin. We found no maker data to quote, so treat the contrast with cement as a question to ask, not a given.
• Timber chips in resin, on plywood. Not glass, but it often sits in the same conversation: end-grain chips of timber cast in a coloured binder on a plywood substrate, then oiled or lacquered. It behaves like a dense timber board and is specified as a worked surface (our materials page).

For the wider comparison of worktop materials, including natural stone, engineered quartz, sintered stone and solid surface, see worktop materials compared; for terrazzo specifically see terrazzo specification.

Heat, stain, scratch and impact

Heat, stain and scratch behaviour are the three things a hospitality client asks about, and for these surfaces the honest answer is “it depends on the binder and the maker”. No standard written for recycled-glass composite worktops turned up, and the figures in retail and trade guides disagree with one another, so none is quoted here.

The test methods that exist for the neighbouring engineered-stone family (the BS EN 14617 series, listed on the worktop sheet) were written for stone aggregates. Whether a maker tests glass composites to them, by analogy, is a question for the maker: ask which standard, which edition and for the report on this exact product.

Thickness, seams, repair and dust

Fabrication is where a composite worktop is won or lost, and a specifier’s questions are the same as for any worktop. We found no published thickness, span or overhang table for these materials and the sheet gives none. Ask the maker for the slab sizes and thicknesses it supplies, the tolerance on thickness and flatness, and the polish or finish options (ground and polished, honed, patina).

• Supports and overhang. Limits are the maker’s and the fabricator’s to state for the actual layout; the statics are the same as for stone: see stone worktop thickness, overhang and support.
• Seams and cut-outs. Cast aggregate varies slab to slab, and our materials page says the variation is intended. Sequence slabs from one batch, agree seam positions on a layout and approve the sample against the batch.
• Repair. Ask how a chip or a worn patch is repaired on site, and by whom.
• Dust. Cutting and grinding any composite makes dust. Glass is not crystalline silica, but a composite may carry other fillers, so ask for the safety data sheet and the crystalline silica content; see engineered stone and silica guidance. Whether HSE’s engineered-stone guidance reaches glass composites is not something we could confirm.

Recycled content and other claims

Recycled content is the main reason these surfaces are chosen. The figure on a page is a maker’s claim until the basis is shown: which share of the slab is recycled, measured how, from which waste streams, and documented in what. Ask for the evidence you would put in a sustainability report. For how to read an environmental product declaration when one exists see how to read an EPD, and for what a tender asks for see sustainability documents a tender will ask for.

The same caution applies to fire, slip and food-contact statements for a worked surface or a lacquer on it: ask for the test report for the exact finish, not a general statement. For floor use see slip resistance for floors and floor reaction to fire.

[Recycled-glass / timber-chip] composite worktop to [drawing ref]: aggregate [recycled glass / timber chips], binder [cement-based / resin], [thickness] mm, finish [ground and polished / honed / oiled / lacquered], edge [profile]. The maker is to confirm the binder type, the thickness and tolerance, and the slab or sheet size in writing.

The maker is to state in writing: the temperature the surface tolerates from a hot pan [ ], hob or oven adjacency advice, the sealer and re-seal interval where the binder is porous, the cleaners to avoid, and how minor wear and a chipped edge are repaired. These are to be in the care sheet for the handover pack.

Recycled content: [ ] per cent, with the basis of measurement and supporting documentation. Test reports: [standard, edition] for [abrasion, thermal shock, chemical resistance] on this product, with the laboratory report. Safety data sheet including crystalline silica content. Any fire, slip or food-contact statement to be supported by a report for the exact finish.

A sample of the proposed composition, finish and edge from the production batch is to be approved by [designer] before fabrication [sample ref]. Natural variation in aggregate size, colour and density between slabs is accepted within the approved sample range; seam positions and slab sequence are to be agreed on a layout before cutting.

Standards and sources

• BS EN 14617 series (agglomerated stone, test methods): named on the worktop sheet; parts 4, 6 and 10 are abrasion, thermal shock and chemical resistance (search listing); applicability to glass composites unconfirmed; standards not read.
• BS EN 15388:2020: agglomerated stone, vanity and kitchen tops (as recorded on the worktop sheet); applicability to glass composites unconfirmed; not read.
• No standard written for these composites: none was found for recycled-glass composite worktops.

Questions we are asked

Is a recycled glass worktop heatproof?

Not as a blanket statement. The binder, not the glass, usually sets the limit, and sources disagree on figures. Ask the maker for a rated temperature for hot pans in writing, and use trivets.

Does a cement-bound glass worktop need sealing?

Cement is porous, so yes: it is sealed and re-sealed over time, and strongly acidic products can etch it. Ask for the sealer and the interval. Resin-bound surfaces are described as non-porous, but the maker should confirm.

What is the difference between a recycled glass worktop and terrazzo?

Both are aggregate in a binder. The aggregate here is glass rather than marble or stone chips. The same binder logic applies: cement is porous, resin is not. See the terrazzo sheet for the stone version.

Are recycled glass worktops silica free?

Glass is not crystalline silica, but a composite can contain other fillers, so ask for the safety data sheet and the crystalline silica content. We could not confirm whether HSE’s engineered stone guidance reaches glass composites.

How do I check a recycled content claim?

Ask for the percentage, how it was measured, the waste streams it comes from and the document that supports it. Treat a figure on a web page as the maker’s claim until you have seen the basis.

Can a timber chip and resin surface be used as a worktop?

Makers position it for worktops, bar tops and desks, finished in oil or lacquer. It is a timber-based composite: protect it from sustained heat, wipe spills and re-oil oiled surfaces. Ask for the test reports for the exact finish.