This is very much the "new kid on the block", its fashionable colours, aggressive marketing and sometimes aggressive sales people have made it rise in popularity fairly quickly. It is generally a combination of stone chips (the stuff we throw away) and resins or plastics to hold it all together. Sometimes dyes and other materials such as glass, mirror, shell, plastics, etc are also incorporated. There are a number of different products available in this product category, but they are largely all manufactured under the same copyrighted "TREND" system.
Quartz Component - The people selling these products will tell you that they are generally 97% quartz. The Material Safety Data Sheet (MSDS) provided by the manufacturers of one of the more popular engineered stone products shows that the actual quartz composition can be as low as 60%.
Heat Resistant - Their salesmen will tell you they are heat proof, but check the warranties they offer you will see that they are not. If you check the MSDS for the same product mentioned above, you will see that the product will actually SELF-IGNITE at 490 degrees and that fire fighters should wear fully self contained breathing apparatus in positive pressure mode due to the toxins given off by the product. The MSDS also states that thermal decomposition (from exposure to heat) may lead to the release of oxides of Carbon and Titanium. Ask your engineered stone salesman to attack his product with a blow torch and see what he says!!! We'll do it to our product!!
Scratch and Chip Resistant - Again, the salesmen of these products will often tell you that they are scratch proof, but their warranties say otherwise. Considering the hardest individual component in these products is quartz (granite chips), the product will not generally be any harder than granite, then when you consider some of the other components such as resins, glass, shells, and stones other than quartz that are used, you can see how the products cannot be scratch-proof.
Will Fade - These products are not covered under warranty if they are used outdoors. In fact they are recommended NOT for outdoor use. This is because they will fade in sunlight (which poses questions about their longevity in kitchens with windows) and the resins used to hold them together will break down over time under UV light.
Some McDonalds restaurants have installed engineered stone tops as tables in both indoor and outdoor situations. Some of those used outdoors have faded from extremely in less than a year, with clearly visible breakdown of the resin binding.
Some have also experienced warping of the products used outside (just from the heat of being outdoors) and are beginning to see fading on tables placed indoors but near windows. Scratches are clearly visible in a lot of cases as well.
Colour Variations and Uniformity - These products can provide some colours which nature cannot, and can also provide a uniformity of colour that is appealing to interior designers and the like as they can do an entire block of units and every kitchen will be exactly the same. Some natural granites also offer high rates of colour uniformity, but for many people the colour variations and patterns only available in Natural Granite are what makes it so appealing. Horses for courses!!!
Fashionable - Due to the enormous amounts of money being spent on marketing and the fact that these products are the "latest thing", they are quite fashionable, as are some of the colours they offer. The problem with fashion though, is it will date, and just like stonewash jeans and hypercolour t-shirts, some of these colours will date and become unfashionable as trends change.
Unknown Longevity - This manufacturing process has not been around for a very long time, and many of the products have been on the market for less than 10 years. Given that they utilize components that are known to break down over time such as resins and "special polymers" (plastics), how long they will last before beginning to break down is unknown.
We recently saw an advertisement from one manufacturer claiming that their product would last longer than granite!!! Considering their product has not even been in manufacture for 15 years and the stone we are putting in peoples kitchens is already millions of years old, we find it amusing that they can make statements such as this!
Expensive - These products will often be the most expensive choice for your kitchen project.
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