Experts in Concrete Patio resurfacing options

Can You Lay Pavers or Tiles Over an Old Concrete Patio?

If your existing concrete patio is looking tired, cracked, or out of style, you might be wondering if it’s possible to upgrade it without breaking it up and starting over. Laying pavers or tiles over concrete can be a great solution, but only if done correctly.

In this guide, we explore the pros and cons of overlaying your concrete patio, the key preparation steps, and which method is best suited for UK gardens and weather.

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What to Know Before Installing Over Concrete

Laying pavers or tiles on top of an existing slab saves time and labour, but it only works when the base is stable. Here's what to look out for before you begin.

The Concrete Must Be Structurally Sound

If the concrete is cracked, sunken, or crumbling, it’s not suitable for a surface overlay. You should only tile or pave over concrete that’s level, solid, and in good overall condition. Any movement in the slab beneath will cause problems in your new surface later on, including lifted tiles, cracked grout, or uneven pavers.

You’ll Be Raising the Patio Height

Adding a new layer of pavers or tiles on top of concrete increases the finished height of the patio. This can affect drainage, door clearances, and thresholds. In most UK homes, even a few extra centimetres may require changes to surrounding landscaping or step levels. It’s important to plan for safe, smooth transitions.

Drainage Must Be Managed Properly

When laying over concrete, you’re potentially trapping water between the old slab and the new surface. This can cause frost damage, weed growth, or tile loosening. You’ll need a drainage gap, slope, or mortar system that allows water to run off or through safely, especially in wetter UK climates.

Surface Prep is Everything

The old concrete must be cleaned, repaired, and primed before any new surface is laid. For tiles, this may involve applying a bonding primer or waterproof membrane. For pavers, a thin layer of mortar or sand may be required for levelling. Skipping prep risks adhesion failure and early degradation.

Overlay Methods That Work in UK Gardens

Thin Paving Slabs on Mortar

Ideal for a clean, modern look using porcelain or concrete slabs 20–30mm thick.
Use a mortar bed with primer slurry to ensure good bonding to the base.
Apply consistent falls to manage water run-off and avoid pooling.

Porcelain or Outdoor Tiles

Non-slip exterior tiles offer stylish finishes and come in a wide range of colours and textures.
Use a flexible tile adhesive designed for outdoor conditions and apply to a clean, dry concrete surface.
Grout using weather-resistant jointing compounds that can handle freeze–thaw cycles.

Raised Paver System (on Pedestals)

Pedestal systems allow you to install pavers over concrete with minimal contact and adjustable height.
Water drains freely underneath, and individual slabs can be lifted or replaced without damage.
Best suited for larger patios where weight-bearing and ventilation are key considerations.

Frequently Asked Questions

Yes, as long as the concrete is sound and you use a mortar bed or suitable adhesive. Make sure to allow for drainage and proper fall so water doesn’t pool between layers.

Yes, any movement in the existing slab will likely cause the surface layer to crack or lift. That’s why the condition of the concrete must be carefully assessed first.

Overlaying can be more cost-effective in the short term. But if the base is unstable or drainage is poor, full replacement is often the better long-term solution.

Use a flexible, weather-resistant tile adhesive designed for outdoor porcelain or stone. Check that it’s suitable for use on concrete and for the UK climate.

No, in most cases, resurfacing a patio doesn’t require planning permission. However, major level changes or work near boundaries may need approval, especially in conservation areas.