Picking an exterior wall coating sounds straightforward until you start looking into it properly. Before long you’re knee-deep in product specifications, contractor recommendations that seem to contradict each other, and a growing suspicion that everyone is trying to upsell you on something you might not need. We’ve been in this industry long enough to cut through that noise, and this guide is our attempt to explain the main types of exterior wall coatings clearly, honestly, and without the sales pitch.
The types of exterior wall coating that’s right for your home depends on your wall surface, your local climate, your property’s age, and what you’re primarily trying to achieve, whether that’s protection, insulation, aesthetics, or all three. Getting this decision right is the foundation of a result that lasts.
Acrylic Wall Coatings
Acrylic coatings are one of the most commonly specified products in the residential exterior wall coating market, and for good reason. They’re water-based, which makes them low in VOCs and easier to work with in variable conditions. Once cured, they offer solid UV resistance and create a tough, flexible layer that protects the wall surface from rain penetration and surface erosion.
Where acrylic coatings work particularly well is on brick surfaces and properties with relatively stable walls that aren’t dealing with significant movement or damp. They dry relatively quickly compared to thicker systems, which is an advantage during the shoulder seasons of spring and autumn when the weather is unpredictable.
The limitation worth knowing about is breathability. Acrylic coatings systems are less vapour-permeable than silicone alternatives, which means they’re better suited to properties where internal trapped moisture levels are well managed. For older homes or those where damp has been an ongoing issue, silicone is usually the stronger recommendation.
Silicone Wall Coatings
If you ask most experienced exterior wall coating contractors what they specify most often for UK residential properties, the answer is typically silicone. The reason comes down to the climate. The UK’s combination of high rainfall, frequent temperature swings, and prolonged damp periods makes breathability a critical quality in any exterior coating system.
Silicone coatings allow moisture vapour to pass outward from the wall while simultaneously repelling liquid water on the external surface. That two-way performance solves one of the main problems with older, less sophisticated coatings, which is the trapped moisture inside the wall and causing the kind of internal damp that ends up being far more expensive to deal with than the original weatherproofing would have been.
Aesthetically, silicone systems produce a clean, consistent finish. They tend to be self-cleaning to a degree as well. The hydrophobic surface allows rain to sheet off rather than sit on the surface, which reduces the rate at which biological growth like algae and moss can take hold.
For more on how exterior wall coatings handle damp, read our guide on wall coatings and damp prevention.
Elastomeric Coatings
Some walls move. Not dramatically, not visibly, but as a natural consequence of thermal expansion, settlement in older foundations, or the gradual shift of a structure over time. That movement creates fine cracks, and fine cracks are exactly where water gets in.
Elastomeric coatings are formulated to handle this. They have a far higher elongation rate than standard acrylic wall coatings or silicone products, meaning they can flex across a hairline crack without losing adhesion or tearing. For properties in areas with clay-heavy subsoils, which are particularly prone to seasonal ground movement, this characteristic is genuinely valuable rather than a nice-to-have.
In our experience, elastomeric products deliver their best results when the surface preparation is thorough. Their flexibility doesn’t replace the need to repair significant cracks before application; it manages the micro-movement that’s impossible to prevent entirely. Getting these two things confused is a mistake that leads to disappointment.
Textured Coatings
Textured right exterior wall coating sit slightly apart from the others because their appeal is as much aesthetic as functional. They’re applied at a greater thickness than smooth systems, either by spray or trowel, and create a finish that ranges from fine stipple to coarse aggregate depending on the product and the desired result.
The practical advantages are real. The additional thickness contributes to insulation value, and the irregular surface makes it harder for dirt and biological growth to gain a foothold in some conditions. But the reason most homeowners choose textured coatings is appearance, particularly on pebbledash properties where the original surface has become uneven, stained, or simply looks tired.
A textured coating applied over prepared pebbledash transforms the exterior of a house completely. It’s one of the more dramatic visual changes we see in this type of work, and the results consistently surprise homeowners who weren’t sure what to expect beforehand.
For more on which coating suits your specific wall type, see our guide on wall coatings for different surface types.
Cork Spray Coatings
Cork coatings are the newest category to gain real traction in the UK market, and the interest is justified. Derived from natural, renewable cork, these spray-applied systems offer a combination of properties that no single synthetic product matches: thermal insulation, acoustic dampening, breathability, and weather resistance all in one application.
The acoustic benefits are worth highlighting specifically. For homes near busy roads, railways, or in urban areas where external noise is a daily frustration, a cork coating reduces sound transmission through the external wall in a way that a standard coating simply doesn’t. The thermal performance is similarly notable. Cork has been used as a natural insulator for centuries, and modern spray cork systems harness that property effectively.
The cost is typically higher than a standard acrylic wall coatings or silicone system, which puts some homeowners off initially. Over the lifetime of the textured wall coatings product, particularly when energy savings and the value of reduced noise are factored in, the numbers often look more compelling than a straight upfront comparison suggests.
Choosing the Right Type for Your Home
The honest answer to “which type is best?” is that it depends, and any contractor who gives you a firm recommendation before surveying your property and asking about your priorities isn’t giving you genuinely useful advice.
A few practical pointers: for most UK homes built post-1950 with rendered or brick exteriors and no significant structural issues, a quality silicone coating is usually the most sensible starting point. For older properties with movement history, explore elastomeric options. For homes where energy efficiency and noise are priorities, cork is worth a serious look. And if your main goal is a dramatic aesthetic transformation on a budget, a textured acrylic system often delivers excellent value.
What matters most is that the product choice and the installation are done by people who know what they’re doing.
Read our complete guide to wall coatings to understand the full picture before making a decision.
If you’d like to find out which type of exterior wall coating is right for your specific property, our team at Will Fix It Home Improvements offers a free, no-obligation survey. Visit our wall coatings service page to get started.