What Gap Between Porcelain Slabs?

April 2024
Anton White

Determining what gap between porcelain slabs is optimal can be a puzzle for many looking to enhance their outdoor spaces. At Ovaeda, our years of expertise have shown that the minimum gap you should have is 3mm, but to strike the perfect balance for both aesthetics and functionality, we recommend 4-8mm.

This article delves into the reasons behind this recommendation, the necessity of spacers for achieving uniformity, and how these elements contribute to the longevity and beauty of your porcelain paving.

With a blend of professional insight and practical advice, we aim to equip you with the knowledge needed to make informed decisions for your outdoor projects.

What this article covers:

What Size Gap Should You Leave Between Porcelain Slabs?

From our experience, the magic number for the gap between porcelain slabs is a minimum of 3mm, but we recommend aiming for 4-8mm. This isn't just a number we've plucked from thin air; it's backed by the precision of rectified edges that porcelain slabs boast.

These finely cut edges of the best porcelain tiles allow for a sleek, contemporary finish with minimal grout lines, ensuring your outdoor space looks nothing short of spectacular.

But why 3mm, you ask? Well, it's all about balance. Too narrow, and you risk the grout cracking. Too wide, and you lose that seamless, modern aesthetic everyone craves. 

what size gap between porcelain slabs

After putting it to the test, we've found that a 3mm gap strikes the perfect balance, allowing for natural movement while maintaining a crisp, clean look.

Do You Need Spacers for Porcelain Paving?

In a word, yes. Spacers are crucial for achieving a level, uniform finish. Without spacers, you're essentially paving blind, hoping that each slab aligns perfectly with its neighbour. It's a risky business, and in our line of work, we prefer to leave nothing to chance.

Why Should You Use Spacers For Porcelain Paving?

  • Level Perfection: Spacers keep your paving straight and narrow, ensuring each slab is laid with precision. You'll be able to easily check this with a spirit level.
  • Uniformity: With spacers and a porcelain paver pedestal system, every gap is consistent, giving your project a professional, symmetrical finish.
  • Damage Prevention: They help guard against the wear and tear of the elements, ensuring your slabs expand and contract without coming to harm.


The ideal 4-8mm gap between porcelain slabs, coupled with the strategic use of spacers, is crucial for ensuring a durable, aesthetically pleasing outdoor space and achieving the maximum benefits of porcelain tile.

These guidelines not only prevent damage from thermal expansion but also maintain the seamless, contemporary look that is highly sought after in modern landscaping. Spacers, in particular, play a pivotal role in achieving a level and uniform finish, making them indispensable in the installation process.

what size gap between porcelain slabs

By adhering to these best practices, you can enjoy a beautifully paved area that stands the test of time. For top-quality porcelain paving slabs and expert advice, consider Ovaeda as your go-to source for all your outdoor decking and accessory needs.

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