Stone bench tops cannot be installed straight onto open carcasses. For benches with edges deeper than the standard 20mm thickness, substrates (which are normally made of 18mm MDF) must be affixed to the top of all cabinet carcasses to support the weight of the stone bench top (refer to diagram below), and must be level to keep the stone flat. The substrate must be offset 25 mm (for mitred edges) or 45 mm (for laminated edges) from the desired finished edge on each exposed side of the stone.
The substrate should be installed using small “L-brackets” screwed into the cabinet carcass from beneath the substrate. This is so, if the stone needs to be moved or replaced, the stone and substrates can be removed without damaging the carcass.
The substrate must have all cut-outs (sink, cook top, tap hole, waste hole, etc.) cut from it prior to installation of stone.
Under mount sinks are be recessed into the substrate, allowing for 5mm movement in all directions.
A rail on edge to front and back of hot plates, sinks and dishwashers must be installed (refer to diagram below).
For 20mm edge benches, a top on each cabinet carcass, with particular attention to rails, is required, as indicated in the following diagram. A maximum span of 600mm is allowed. Alternatively, a substrate can be used and finished in the same material as your cabinetry to create a shadow line effect. Please discuss support options with your cabinetmaker (and/or refer to INFORMATION SHEET B). An overhang of up to 150mm can be achieved without a substrate support.
Templates and substrates will usually be provided by your cabinetmaker. In the case of flat-pack style cabinets and revamps you may need to arrange for the supply of these items separately. It is advisable to have these produced professionally as our quote allows for one site visit for template check measure and/or collection, and one installation visit. Additional charges will be levied for additional check visits or on-site amendments to bench tops.
Please note that benches cannot be installed snug with adjoining walls/panels as stone is subject to expansion and contraction and therefore needs to have a suitable gap. This is also applicable to benches which adjoin free standing ovens.
Templates are a pattern of the desired bench top(s) and are to be provided to Multiform Stone by the customer. These will normally be constructed of 3 – 4mm thick MDF timber and are to be the exact size and shape of the finished stone product. Any appliance, sink and tap / water filter tap hole locations and sizes must also be indicated and cut out on the template and substrate. All dimensions should be clearly written on the front face. The client name, install address, product (brand and stone name) and edge style should also be clearly noted, as should indications of which edges are to be polished (these should be marked with a “ // “ for 20mm edges or “ X “ for 40mm edges, a “ ⮿ “ for other edge depths and a “ O “ for waterfalls).
Base cabinets must be complete, in place and structurally sound before templates are constructed to ensure an accurate fit, particularly where the bench is to adjoin a wall or fixed panel.
Once templates have been constructed, we can process your order and you will be advised of an anticipated delivery/installation date. A Multiform Stone team member will call to arrange an appointment to “laser check measure” your templates onsite and may take them and any under mount sinks/basins to our factory (this will be determined by our template measurer at this appointment).
For benches with under mount sinks we will require the cut out to be precise and for details including sink model number, brand, and relevant mounting instructions such as “cut out edge flush with sink” or “exposed lip of 10mm”, to be clearly written on the relevant template. The customer will also need to provide the sink and any accessories (such as drainage bowls, cutting boards, etc.) at the time of check measure.
At this stage, a deposit of 50% of the quotation price will be required.