Experts in Concrete Patio installation
If your patio surface is starting to chip, flake, or peel away in patches, you may be dealing with a common issue known as spalling. It affects many UK homeowners, particularly where winters are damp and cold.
In this guide, we explain what causes concrete spalling, how to repair it effectively, and most importantly, how to stop it from coming back in future seasons.
Concrete spalling usually begins at the surface and gradually worsens if left untreated. In the UK, where moisture and freeze–thaw cycles are common, it’s a top reason for early patio deterioration. Here’s what causes it.
If the surface of the concrete was overworked or water was added during finishing, it can create a weak, brittle top layer. This layer is more prone to flaking and spalling once exposed to moisture and freezing temperatures. It's especially common in rushed or budget installations.
In colder months, water soaks into the concrete. When it freezes, it expands inside the slab and forces small pieces of the surface to break away. Without sealing or drainage, patios in the UK are highly vulnerable to this recurring cycle.
Products used to melt ice or clean patios can damage the surface. Chloride-based salts in particular weaken concrete and contribute to spalling. Using the wrong type of cleaner or de-icer may accelerate the breakdown of the surface over time.
Even well-built patios can begin to show signs of spalling as they age. Prolonged exposure to UV rays, rain, frost, and foot traffic wears down the surface protection. If not resealed every few years, older slabs can begin to flake or crumble from the top down.
Regular maintenance, like cleaning and resealing, is vital for preventing surface damage. Without it, water sits on the surface and penetrates weak points. Over time, this accelerates spalling, especially on textured or stamped concrete where surface detail is more fragile.
Yes, surface flaking can be treated with a concrete resurfacer. As long as the damage doesn’t extend deep into the slab, full replacement is not necessary. Proper preparation and sealing will restore both function and appearance.
Spalling affects the surface and results in flaking or scaling. Cracking usually runs deeper through the slab. Both are forms of damage, but spalling is often caused by freeze–thaw cycles or poor surface finish, while cracking may be structural.
Yes, but use a gentle setting. Pressure washing helps remove loose material before repair. Be careful not to erode more of the surface, especially if the concrete is already weakened or thin.
If caused by poor workmanship or incorrect curing, yes. However, flaking due to neglect, salt use, or age may not be covered. We assess each case individually and offer honest advice on next steps.
Apply a high-quality sealant every few years, avoid harsh chemicals, and ensure good drainage around the patio. Cleaning and seasonal checks go a long way toward preventing future surface issues.
Contact us now by filling in this form, emailing the address below, or calling us on the number provided.
+44 7813 957982
info@concretepatios.co.uk