Concrete Flags and Slabs for Patios, Paths & Driveways

Transform outdoor spaces with durable concrete flags built for the UK climate. These concrete flagstones are ideal for lasting performance when laying patios, driveways, and garden paths. Order now for rapid 2–3 day delivery — £18 under £125, £10 under £250, and FREE over £250. Discounts available for large or bespoke orders.

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Concrete Flags delivered wherever you want, in 2-3 working days. 

We offer two types of concrete slabs, both frost-resistant and weatherproof:

  • 900×600 50mm grey concrete flag — A larger slab size ideal for covering more ground quickly, creating a sleek, modern look with fewer joints. Perfect for driveways, patios, and bigger landscaping projects where strength and a clean finish are important.

  • 600×600 50mm grey concrete flags — A more versatile, manageable size that’s easier to handle and lay, making it a practical choice for DIYers, smaller patios, garden paths, or areas where a balanced, uniform paving pattern is preferred.

You might also be interested in our gravel and aggregates which are often paired with paving for driveways and landscaping; our concrete blocks if you’re building retaining walls or structural bases, and our treated timber if you’re planning on decking or edging alongside paved patios. 

 

Order from a 5-star concrete paving slabs supplier, according to REVIEWS.io.

At Supreme Merchants, we believe ordering for building materials online should be easy. Benefit from secure payments with Klarna and PayPal. Plus, get 14-days to return any unopened / excess materials you purchase. (See more on our returns and cancellations here.)

Buy now and get your outdoor project moving without delay. And please get in touch with us if you have any questions. 

 

FAQs — Concrete Flags and Slabs

How fast is your delivery?

Most orders are delivered within 2–3 working days across the UK. Get in touch with us if you’re in a particularly remote part of the UK, as there might be some discrepancies. But we deliver across the country. 

Can I return unused slabs if I’ve ordered too much?

Yes, on unopened packages we offer a 14-day returns policy for peace of mind if you order more than you need. Find out more about our returns and cancellations here. 

Do you offer volume discounts automatically, or do I need a bespoke quote for larger projects?

Discounts are applied for larger quantities, with bespoke quotes available for big projects. Please get in touch with us if you have any questions about a particular job or order. 

Can you source items that aren’t on the site and manage the whole order for me?

Yes. Please get in touch with us. Our team will source from our trusted supplier network and manage your order start to finish.

Our live chat and telephone line is open Monday to Friday, from 9am to 5pm. If you have a question outside of these hours, please email us on: customerservices@supremeindustriesltd.co.uk.