20mm vs 30mm quartz worktops: How to choose

Even after you’ve chosen the colour of your quartz worktop, there’s still one more choice you have to make – 20mm or 30mm quartz worktops. Most quartz worktops only come in these standard thicknesses, so you’ll have to decide between them. Although it seems like a minor decision, it’s essential to get the thickness of your quartz worktop right. 

In this guide, we’ll cover each thickness’s uses, pros and cons and how you should make your final decision. 


20mm quartz worktops 

20mm quartz can be used in various applications, including worktops, kitchen islands, splashbacks, upstands, and window sills. Because of this, they’re becoming an increasingly popular choice in many modern kitchens.


Pros of 20mm quartz worktops

20mm quartz slabs are incredibly versatile – you can use the same quartz thickness throughout your kitchen. These slabs are lighter, so they can be customised for different applications. 

Quartz kitchen work surfaces with a 20mm thickness are thinner, adding a sense of simplicity to the room and creating a sleek look with a modern touch. They’re also cheaper than a 30mm slab, making them a more cost-effective option.


Cons of 20mm quartz worktops

Thinner quartz slabs are less durable and tough than thicker ones. A 20mm slab won’t withstand the same force as a 30mm slab. However, 20mm and 30mm worktops should withstand regular wear and tear, even in high-traffic areas. 

These slabs only allow a maximum of 250mm unsupported overhang, which might restrict the size of the breakfast bar or island in your kitchen. This thickness might also be a problem if you want to install a heavy sink or an induction hob. 



30mm quartz worktops 

This thickness is considered the best option for countertops in kitchens and bathrooms. This creates a lavish, elegant look that is perfect for any luxury home. However, 30mm is too thick for vertical panels, splashback, and upstands, as it sticks out too far from the wall. This means you might need to use a mixture of 20mm and 30mm thicknesses in your kitchen. 


Pros of 30mm quartz worktops

A 30mm quartz worktop is incredibly tough and durable, making it a perfect choice for counters in high-traffic areas. This thickness has better structural security and can support heavy sinks and hobs of any size without a problem. 30mm quartz also allows for an unsupported overhang of up to 300mm, perfect for creating a breakfast bar.

Because 30mm has previously been the standard in quartz worktops, you can find jumbo slab sizes in this thickness, allowing you to create large seamless worktops and islands. 


Cons of 30mm quartz worktops

30mm quartz worktops tend to be more expensive than 20mm quartz. Also, because this thickness isn’t suitable for splashbacks and upstands, you might have to use thinner slabs for other kitchen elements. 



What is better, a 30mm or 20mm quartz worktop?

For most kitchens, a 30mm quartz surface is considered the better choice due to its superior strength and structural integrity. This is especially important if you plan on a heavy sink, induction hob or breakfast bar. The chunkier quartz slabs create a more luxurious feel, and many quartz colours and patterns look better with this thickness. 

However, a 20mm quartz worktop is the cheaper option if you’re on a strict budget. These slabs typically cost less, and using 20mm slabs means you only need to use one thickness for your kitchen. 


How Mo’s StoneX can help

Quartz worktops are a stunning addition to any kitchen or bathroom, no matter what thickness you go for! We’re the perfect solution if you’re looking for a professional and experienced quartz worktop supplier. 

Mo’s StoneX has over a decade of experience supplying, templating, and installing luxury quartz kitchen worktops. We have a huge range of popular quartz colours and customisable finishes for you to choose from! It’s easy to find the perfect quartz countertop to suit your kitchen or bathroom. We have popular marble-inspired quartz colours, such as Carraras and Calacattas, and trendy sparkly patterns. 

Our friendly team handles everything – you can rely on us to guide you through the process. We even provide you with a free initial quote to get you started!

Fill out our online enquiry form for a free quote and to get started on your quartz worktop journey! Or get in contact with our team for some guidance on what thickness to opt for.