5 Things to Know Before Buying Composite Quartz Stone

Introduction

Composite quartz worktops have become a popular choice for kitchen and bathroom renovations due to their durability, aesthetic appeal, and low-maintenance properties. For homeowners and designers alike, understanding the materials, advantages, and potential drawbacks of these worktops is crucial before making a purchase decision. This article will delve into what composite quartz worktops are, followed by answering common questions to help you make an informed choice.

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What are Composite Quartz Worktops?

Composite quartz worktops, also known as engineered stone worktops, are made from a mixture of 90-95% natural quartz crystals combined with resin, pigments, and other additives. Unlike natural stone like marble or granite, composite quartz is manufactured, giving it consistent quality and a range of colour options. The result is a highly durable, non-porous surface that is resistant to stains, scratches, and heat, making it ideal for kitchens and bathrooms.

Quartz is one of the hardest minerals on earth. Which is why composite quartz worktops are well-known for their strength and longevity. The manufacturing process also allows for a more uniform appearance, unlike natural stone, which may have irregularities in pattern and colour.

Answering Common Questions About Composite Quartz Worktops

How durable are composite quartz worktops?

Composite quartz worktops are incredibly durable, making them an excellent choice for busy kitchens. The primary ingredient, quartz, is one of the hardest minerals found in nature. When combined with resins and other materials, it forms a worktop surface that can withstand daily wear and tear. This toughness means it resists scratches, chips, and cracks much better than many other worktop materials. Unlike softer stones, composite quartz can handle the constant use of knives, pots, and pans without showing visible signs of damage, provided proper care is taken.

Are composite quartz worktops heat-resistant?

Yes, they are resistant to heat up to a point, meaning they can withstand brief exposure to hot items like pans or dishes. However, it's important to remember that while the surface won't immediately scorch, sudden temperature changes, known as thermal shock, could cause cracking. This is why trivets or heat pads are essential when placing hot cookware on composite quartz. Prolonged exposure to excessive heat can also damage the resin in the material, so it's best to err on the side of caution to maintain the worktop's pristine appearance over time.

Can composite quartz worktops stain?

One of the major benefits of composite quartz worktops is their non-porous surface, which makes them highly resistant to stains. The non-porous nature prevents liquids from seeping into the material, reducing the risk of stains from common substances like coffee, wine, oils, and acidic foods. However, while they are stain-resistant, they are not completely stain-proof. Cleaning up spills promptly is always recommended. Routine cleaning with warm water, mild detergent, and a soft cloth will help maintain their appearance, preventing any potential discolouration from prolonged contact with staining agents.

Are composite quartz worktops easy to maintain?

Composite quartz worktops are exceptionally easy to maintain compared to natural stone surfaces like granite or marble, which often require sealing. The non-porous surface of quartz doesn't harbour bacteria or stains, making cleaning and upkeep straightforward. For daily maintenance, all you need is a damp cloth and mild soap or detergent. There's no need for specialised cleaners or sealing treatments, which saves time and money in the long run. Because of their ease of maintenance, quartz worktops are particularly well-suited to busy households or commercial kitchens where cleanliness is paramount.

How are composite quartz worktops installed?

The installation of composite quartz worktops is a precise process that requires professional expertise. The material is heavy and requires accurate measurements and cutting to fit perfectly into your kitchen or bathroom. During installation, the worktop must be positioned carefully to avoid damage, and any seams must be carefully aligned for a seamless look. Because of the material's weight, it's essential that the cabinets or units underneath are strong enough to support the worktop. Professional installers will also ensure that cut-outs for sinks, hobs, or taps are completed accurately and without compromising the integrity of the quartz slab.

Can composite quartz worktops be repaired if damaged?

While composite quartz worktops are incredibly durable, they are not indestructible. In the event of damage, such as chips or cracks, repair is often possible depending on the severity. Small chips can be filled with colour-matched resin, making them virtually invisible. Larger cracks or damages may require more extensive repairs or even replacement of the affected area. It's always recommended to seek professional help for repairs, as attempting to fix composite quartz on your own could result in further damage. Thankfully, such incidents are relatively rare given the material's strength.

Do composite quartz worktops have seams?

Yes, in larger worktop installations, seams are often unavoidable. However, skilled installers take great care in positioning seams in less conspicuous areas, such as near sinks or corners. Additionally, because composite quartz is engineered, the consistent colour and pattern across the slabs make seams less noticeable compared to natural stone, which may have more variation. Seams are filled with colour-matched resin to further blend them into the worktop. While you may not be able to avoid seams entirely, they can be made to look nearly invisible with professional installation.

Can I cut directly on composite quartz worktops?

Although they are highly resistant to scratches, it's still advisable to use cutting boards. Cutting directly on the surface can damage your knives and, over time, may leave fine scratches that dull the surface's finish. While the worktop can withstand everyday use, frequent and direct contact with sharp blades could wear down the resin or even create marks in certain conditions. Using a cutting board will not only protect your worktop but also extend the lifespan of your kitchen knives, ensuring both remain in good condition.

Can composite quartz worktops fade over time?

Composite quartz worktops are designed to retain their colour and finish under normal indoor conditions. However, prolonged exposure to direct sunlight can cause some fading or discolouration over time. For this reason, quartz worktops are not generally recommended for outdoor kitchens or areas that receive a lot of natural sunlight. In indoor settings, though, they will remain vibrant and pristine for years to come. If you have large windows in your kitchen, it may be worth using curtains or blinds to reduce the sun's direct exposure to the worktop.

Are composite quartz worktops available in different thicknesses?

Yes, composite quartz worktops come in a range of thicknesses, typically between 12mm and 30mm. The choice of thickness can affect both the aesthetic and the functionality of your kitchen. Thicker slabs, such as 20mm or 30mm, provide a more substantial, high-end look and offer greater durability. Thinner slabs, like 12mm, are lighter and may be more affordable, making them a good option for those on a budget. However, they may require additional support underneath. The choice ultimately depends on your design preference and functional needs.

Can composite quartz worktops be customised?

Yes, one of the advantages of composite quartz is its customisability. Since it's a manufactured product, you can choose from a wide range of colours, patterns, and finishes to match your kitchen's design. Additionally, the edges can be customised with various profiles, from a simple square edge to more ornate options like bullnose or bevelled edges. This allows you to create a tailored look that complements both modern and traditional interiors. The uniformity in colour also ensures that your customised worktop will have a consistent appearance across the entire surface.

Are composite quartz worktops resistant to bacteria?

The non-porous nature of composite quartz means it is highly resistant to bacteria, mould, and mildew, making it a hygienic choice for kitchens and bathrooms. Because liquids and contaminants can't penetrate the surface, germs don't have places to hide and multiply. This feature makes quartz an ideal choice for households that prioritise cleanliness and food safety. A simple wipe with a cloth and mild detergent is all that's needed to keep the surface clean and free from harmful bacteria, reducing the need for harsh chemical cleaners.

How do I clean composite quartz worktops?

Cleaning is simple and requires minimal effort. For daily cleaning, a soft cloth or sponge with warm water and a mild detergent will suffice. Avoid abrasive cleaners or scrubbing pads, as they can dull the finish over time. For tougher stains, a non-abrasive cleaner or a mixture of water and vinegar can help remove residue without damaging the surface. Additionally, avoid using bleach or harsh chemicals, as they can degrade the resin in the quartz. Regular maintenance will keep your worktops looking like new for years to come.

Conclusion

Composite quartz worktops are a practical and stylish choice for both kitchens and bathrooms. They offer a durable, low-maintenance surface that combines the beauty of natural stone with the benefits of modern engineering. By answering some of the most common questions about composite quartz worktops, this guide should help you better understand whether this material is right for your project. Whether you're looking for a surface that's easy to clean, resistant to stains, or versatile in design, composite quartz could be the perfect solution for your home.

Here's a countertop that's billed as combining the best that nature and man have to offer. Engineered quartz, as it's known, is made of quartz and flexible resins, a combination that has

 the strength of granite counters'with better impact resistance and more forgiving installation options. When Remodelista's Izabella Simmons remodeled her kitchen, she liked the look of marble but opted for engineered quartz countertop on her island. After two years of hard use by her young family, Izabella reports, 'It still looks like new.'  Too good to be true? Here's what we've learned.

Above: This 

Shaker-Inspired Kitchen in London has engineered quartz counters with a marble look, Silestone in Lagoon. Photograph courtesy of deVOL Kitchens.

1. What is engineered quartz?

Engineered quartz (not to be confused with Quartzite, another appealing natural stone used as counters) is a manmade product created mostly from natural materials. It's made of 90 to 94 percent ground quartz and 6 to 10 percent resins and pigments that are combined into durable and nonporous slabs. The strength of quartz, even in a manufactured form, makes it naturally resistant to abrasion, scratches, dents, and even acids without the need for sealants. And the environmental impact of manufactured quartz is low: Quartz is an abundant material and the finished product is nontoxic and nonallergenic, and will last a lifetime, reducing the need for replacement.

Unlike solid-surface, Corian-type manufactured countertops, engineered quartz is not made to order. The product, like natural stone, is created in slabs of set sizes and thicknesses that vary by manufacturer. Caesarstone, for example, offers one slab size (56.5 inches by 120 inches) and two thickness options (0.75 inches and 1.25 inches). The slabs are fabricated to fit your project's requirements (size, shape, and edge profile), and are installed in pieces.

2. What colors and other options does engineered quartz come in?

One of the appealing features of engineered quartz is its wide variety of colors, patterns, and textures. And the range is continuously expanding, spurred on by competition between brands. Note that the color and texture of engineered quartz are more consistent than natural stone'to some this uniformity is an appealing feature and to others it's a drawback.

Colors: The palette leans toward natural shades, but ranges from bright whites (one of the most popular options) to reds and blacks.

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Above: Honed white engineered quartz countertops in a UK kitchen by Jamie Blake of Blakes London, a member of the Remodelista Architect/Designer Directory. 'There's a big trend at the moment to use lighter worktops instead of the darker granites,' Blake says. 'This has created a huge opening for products, such as quartzes, that come in light colors.'  Photograph courtesy of Blakes London.

Patterning

The surface of manufactured quartz depends on how the quartz is ground: Coarsely ground stone produces a flecked appearance, while finely ground has a smooth look. Manufacturers have also created colors and patterns that mimic natural stone, such as marble and granite, and have even created cement lookalikes (an appealing option, since cement itself is prone to cracking, chipping, and staining).

Above L to R: Three color options for Caesarstone: Belgian Moon, Cement, and London Grey.

Finishes

The options include polished, honed/matte, and textured surfaces.

Above: In a kitchen by Mark Reilly Architecture'winner of a Remodelista Considered Design Award'the countertops are made of honed Caesarstone in Pebble. To add heft, the architect introduced a 1 1/2-inch mitered edge on the front face of the counters. Photograph courtesy of Mark Reilly Architecture.

3. Are there different brands of engineered quartz countertops?

Silestone and Caesarstone are the best known, but other brands, including Cambria, Celador, LG Viatera, and Zodiaq from DuPont (creators of Corian) are making their mark. These companies use words and color tones to try to differentiate their brands, but the reality is that their products are more alike than different. They all offer good warranties (the finer details will vary) and have similar price points and product features. The choice usually comes down to availability and color options.

Above: In a Park Slope kitchen addition, architecture firm Khanna Schultz, a member of the Remodelista Architect/Designer Directory, used Walker Zanger Pietra Cucina engineered quartz countertops (this line has been discontinued but rumor has it that Walker Zanger is introducing a new engineered quartz countertop line). 'Engineered countertops are great options for durability,' says architect Robert Schultz, 'and there's a consistent, quality-controlled supply.' Photograph by Antoine Bootz, courtesy of Khanna Schultz.

Above: New York architect Lauren Rubin's go-to brands for engineered quartz are Caeserstone and Celador. 'They both grind their stones very fine to create a pure color,' says Rubin. 'I've used many colors, including deep browns, grays, and whites. I change the thicknesses and the finishes for different applications.' In this New York apartment renovation, Rubin used Caeserstone Espresso. See the whole project in Weekend Spotlight: Combining Two New York Studio Apartments. Photograph by Alyssa Kirsten, courtesy of Lauren Rubin.

4. Where can engineered quartz be used?

Engineered quartz is hard, dense, nonporous, nonabrasive, and nonreactive to acids'attributes that make it perfect for use as countertops, backsplashes, walls, and even floors. Keep in mind that, like natural stone, it's heavy. And it's not recommended for use outside because the resins aren't UV stable (warranties are voided for outdoor applications). In terms of heat resistance, the material is reportedly not affected by temperatures lower than 300 degrees Fahrenheit. That said, it shouldn't be used as flooring over radiant heat because of possible damage from long-term exposure to heat.

Above: Silestone offers a one-piece seamless sink made of the same engineered quartz used for the company's countertops. The Integrity One Piece Sink is available in single and double models.

5. What about cleaning and maintenance?

Engineered quartz countertops are easy to clean and maintain. Warm water and soap are recommend for day-to-day cleaning. For a stubborn spill, you can use a nonabrasive cleaner such as Soft Scrub. The polished finish will stay intact with no need for ongoing maintenance other than avoiding abrasive cleaners that could dull the surface. Note that honed surfaces show more fingerprints and other signs of use than other finishes and require more frequent cleaning.

Above: Silestone Lyra engineered quartz looks like marble but is far more forgiving. Unlike marble, engineered quartz is nonporous and doesn't require sealing.

6. How much do engineered quartz countertops cost?

Slightly more affordable than premium natural stone and comparable to medium-range granite, engineered quartz generally costs between $70 and $120 per square foot installed. Price variations depend on color choice, configurations, and your location. And, as with natural stone, don't overlook the availability of remnants. That's exactly what Remodelista's Izabella Simmons did for her bathroom countertops and backsplash: 'I paid half the price ($40 per square foot) for Silestone, since I was able to find leftover pieces from someone else's project,' she says. 'It's always a good idea to check out the scrapyard.'

Above: Solid white engineered quartz, such as Caesarstone's Pure White and Silestone's White Zeus Extreme, trumps marble for its stain resistance and beats out Corian in heat resistance. In this San Francisco kitchen by Jute, a member of the Remodelista Architect/Designer Directory, Caesarstone counters are paired with custom marble tiles. See Rehab Diary: A Small-Kitchen Makeover with Maximum Storage to tour the full project. Photograph by Drew Kelly, courtesy of Jute.

7. Engineered Quartz Countertop Recap

Pros

• Consistent in color and texture.
• Stain-, scratch-, and acid-abrasion resistant.
• Does not require sealing.
• Won't chip and or crack (thanks to resins).
• Resistant to bacteria growth.
• Comes with long warranties.

Cons

• Lacks variations in patterning and veining.
• Installed in slabs, so seams are visible.
• Not as heat resistant as stone; trivet use is a must.
• Not recommended for outdoor use.
• Should not be used as flooring over radiant heat.

For more on kitchen countertops, see the following posts.

• 10 Easy Pieces: Remodelista Kitchen Countertop Picks
• 10 Favorites: Architects' Budget Kitchen Countertop Picks
• Remodeling 101: Butcher Block Countertop
• Remodeling 101: Concrete Kitchen Countertops
• Remodeling 101: Soapstone Countertops

Finally, get more ideas on how to evaluate and choose your kitchen countertop in our Remodeling 101 Guide: Kitchen Countertops.

N.B.: This post is an update; the original story ran on August 21, .

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Frequently asked questions

What are engineered quartz countertops?

Engineered quartz countertops are made of crushed quartz that is combined with resin and other materials to form a durable and non-porous surface for kitchens and bathrooms.

What are the benefits of engineered quartz countertops?

Engineered quartz countertops are low maintenance, resistant to stains and scratches, and come in a wide variety of colors and patterns to fit any design style. They are also heat resistant and easy to clean.

Are engineered quartz countertops more expensive than other countertop materials?

Engineered quartz countertops can be more expensive than some other materials, such as laminate or tile, but they are often less expensive than natural stone like granite or marble. The price can vary depending on the brand and the complexity of the installation.

Can you cut directly on engineered quartz countertops?

While engineered quartz countertops are resistant to scratches, it is not recommended to cut directly on them as this can dull your knives. Always use a cutting board to protect your countertops.

Can you put hot pots and pans on engineered quartz countertops?

Engineered quartz countertops are heat resistant, but it is still recommended to use trivets or pot holders to avoid any possible damage to the surface.

Are engineered quartz countertops eco-friendly?

Engineered quartz countertops are not considered eco-friendly as they are made from non-renewable resources and the manufacturing process can be energy-intensive. However, some brands have made efforts to reduce their environmental impact through the use of recycled materials and sustainable manufacturing practices.

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