The Ultimate Guide to Wet Room Paints

Let’s be honest – wet rooms are brutal on walls and floors. Standard paints and coatings don’t stand a chance against constant moisture, high humidity, and the ever-present battle against mould. That’s where internal tanking products come in. Think of them as the armour your walls need to keep water where it belongs. These coatings create a waterproof barrier, stopping moisture in its tracks before it can seep into the structure. Whether you’re sealing up a brand-new wet room or saving an old one from damp and decay, the right tanking products do the heavy lifting – keeping surfaces dry, strong, and built to last.

But waterproofing isn’t the whole story. Damp proofing products step in when water finds other ways to cause trouble, like creeping up from the ground or hanging around as condensation. These coatings and sealants don’t just block moisture; they let surfaces breathe while stopping damp from settling in. If you’ve ever dealt with flaking paint, musty smells, or stubborn mould patches, you know how important that is. Whether you’re fixing a damp problem or getting ahead of one before it starts, the right products mean less hassle, fewer repairs, and a wet room that stays clean, dry, and in top shape for years.

 

The Importance of Using the Right Paints and Coatings

 

Ever walked into a bathroom and noticed peeling paint, dark mould creeping up the corners, or walls that feel damp to the touch? That’s what happens when cheap and inferior paint is used in a wet room. This isn’t just about looks – it’s about protecting your home from long-term water damage.

Wet room paints are specially designed for one job: standing up to relentless moisture, direct water exposure, and constant humidity. Unlike standard household paints that absorb moisture like a sponge, these coatings form a protective barrier. Anti-mould paints contain waterproofing agents, anti-mould additives, and moisture-resistant primers, all working together to keep your walls and ceilings dry. Without these, water seeps in, leading to bubbling paint, cracked surfaces, and even structural damage that can cost thousands to fix.

But it’s not just about walls – sealants and coatings are the silent workhorses that protect your floors and ceilings, too. A properly applied waterproof layer locks out moisture, keeping tiles from lifting, grout from crumbling, and wooden subfloors from warping. That means a cleaner, safer, longer-lasting wet room with far less upkeep.

Investing in the right coatings now saves you from costly repairs later. Products like Zinsser are made for these tough and specialist projects. It’s like giving your wet room a suit of armour – keeping it fresh, functional, and water-tight for years to come.

 

Preparing a Wet Room for Waterproofing

 

Alright, folks – before you even think about rolling on that waterproofing, let’s talk about preparation. Because if you want your wet room to stay dry (yes, ironic, but stick with me), you need to start with a solid foundation.

First, clean those surfaces like your bathroom’s future depends on it – because it does. We’re talking grease, grime, soap scum, and any rogue bits of old paint or coatings. If it’s not bonded tight, it’s got to go. A good scrub-down ensures that the waterproofing sticks where it should, not where it wants.

Now, let’s tackle the imperfections. Any cracks, gaps, or porous spots? Seal them up. Water is like a nosy neighbour – it’ll find the tiniest opening and invite itself in. A high-quality sealant or filler will make sure those sneaky little gaps don’t become a gateway for leaks down the road.

Once the surface is clean and sealed, it’s time for the real star of the show: waterproofing membranes. These aren’t just some thin, flimsy coatings – these are heavy-duty barriers that turn your walls and floors into impenetrable shields against moisture. And listen, it’s not just about slapping one coat on and calling it a day. You need full coverage, with careful application and the right drying time between layers. Rushing this step is like leaving the lid off your coffee – it’s only a matter of time before something spills where it shouldn’t.

Do it right, and you’ll have a wet room that’s not just stylish but built to last.

 

Selecting the Right Moisture-Resistant Primers

 

OK, let’s talk about the unsung hero of paint jobs – moisture-resistant primers. These bad boys aren’t just another step in the process; they’re the first line of defence against water damage, peeling paint, and the dreaded bubbling effect. If you’ve ever watched your beautifully painted walls or exterior surfaces degrade over time because of dampness, you already know why this stuff is essential.

Think of a moisture-resistant primer like a raincoat for your walls. It locks out moisture, stops it from seeping into porous surfaces, and creates a stable base for paints and coatings to stick like they mean it. Without it, you’re looking at paint that cracks, peels, and just plain quits on you when exposed to humidity or constant damp conditions.

Why You Need It – And Where

If you’re working in a space where moisture is a given – bathrooms, kitchens, basements, or outdoor areas – skipping the primer is like leaving your car windows open in a thunderstorm. Moisture-resistant primers don’t just help paint last longer; they stop water from creeping in and causing structural damage. That means fewer touch-ups, less repainting, and a lot less hassle down the road.

But it’s not just about durability. These primers fight off mould and mildew – a huge deal if you’re painting in a high-humidity environment. No one wants to repaint their bathroom or basement every year just to keep the walls from looking like a science experiment.

Pick the Right One – And Apply It Right

Choosing a quality moisture-resistant primer makes all the difference. Cheap options might claim to do the job, but if they don’t properly seal the surface, you’re back to square one. A good primer lays the groundwork for paint that grips and holds its ground against the elements.

And here’s a tip – make sure you apply it evenly, follow drying times, and use the right tools. Rushing this step or cutting corners can leave weak spots, and trust me, moisture will find them. Get it right the first time, and you won’t have to worry about repainting for years.

For tricky surfaces or particularly challenging conditions, get in touch with a specialist to make sure you’re using the best product for the job. Because when it comes to keeping moisture out, the right primer is worth every penny.

 

The Role of Sealants in Wet Room Protection

 

Imagine stepping into your wet room, warm water cascading over the tiles, steam rising, and not a care in the world. Now, imagine what’s happening beneath the surface – because if your wet room isn’t sealed properly, that relaxing space could be a ticking time bomb of water damage. That’s where sealants come in, acting as invisible bodyguards against moisture that’s always looking for a way in.

Sealants are the frontline defence in wet room waterproofing. These flexible, water-resistant products create an impenetrable barrier at joints, edges, and corners – the very spots where water loves to sneak through. Without them, moisture can seep behind walls, under floors, and into places it has no business being. And when water gets where it shouldn’t, you’re looking at mould, rot, and potentially some very expensive repairs.

Choosing the Right Sealant: Flexibility Meets Durability

Not all sealants are created equal, and choosing the right one makes all the difference. Silicone-based sealants are a classic go-to because they stay flexible and hold up against constant exposure to water. They’re perfect for areas that expand and contract, like around shower trays and bathtubs. But if your wet room sees a lot of action – think busy households or commercial spaces – a hybrid polymer sealant is the heavy-duty solution. These provide enhanced durability, sticking to a wider range of materials and standing up to constant wear and tear.

At the end of the day, a wet room is only as good as its weakest seal. Every joint, gap, and seam needs to be properly sealed to lock out moisture and keep the entire structure intact for years to come. It’s a small step that makes a massive difference in the lifespan of your space.

 

Choosing the Best Flooring for a Wet Room

 

Let’s talk about wet room flooring. This isn’t just any flooring – it’s got to handle constant exposure to water, prevent slipping, and last for years without breaking down. That means the standard materials found in kitchens or living rooms just won’t cut it. What you need is something completely waterproof, tough as nails, and easy to clean.

Epoxy Coatings: Seamless and Built to Last

One of the best options out there is epoxy flooring. This stuff is the workhorse of wet room surfaces. It goes down as a liquid and hardens into a seamless, rock-solid barrier that doesn’t let water through – period. No cracks, no grout lines, no place for mould to hide. Plus, it’s naturally non-porous, meaning spills and splashes wipe away with minimal effort. And if durability is a concern, rest easy – this material is built to take a beating, whether it’s in a busy commercial facility or your home’s private spa-like retreat.

Slip-Resistant Tiles: A Classic Look with Added Safety

Now, if you’re someone who prefers a more traditional look, textured slip-resistant tiles might be the way to go. These aren’t your average tiles – these are engineered for wet environments, with surfaces designed to enhance grip even when covered in water. Available in a range of finishes and colours, they let you add a bit of personal style without compromising on function. Whether you’re after a modern, minimalist aesthetic or something more classic, there’s a tile to match.

Waterproof Vinyl: Resilient and Low-Maintenance

For those who want a budget-friendly, easy-to-install solution, waterproof vinyl is worth considering. Unlike standard vinyl flooring, this version is completely sealed against moisture, ensuring that no water seeps through over time. It’s also surprisingly resilient, standing up to daily wear while remaining comfortable underfoot. And when it comes to upkeep, it doesn’t get much simpler – just a quick wipe-down keeps it looking fresh.

No matter which option you choose, the key is to prioritise waterproofing, safety, and durability. A wet room floor should give you peace of mind – whether you’re stepping out of the shower at home or maintaining a high-traffic commercial space. Take the time to choose the right material, and you’ll have a floor that stands up to moisture, reduces the risk of slips, and stays looking great for years to come.

 

Improving Ventilation to Protect Wet Room Paintwork

 

Ever noticed paint peeling in a bathroom or a musty smell in the air? That’s the silent work of trapped moisture, turning your wet room into a breeding ground for damp, mould, and flaking paint. The good news? A little air circulation goes a long way in keeping those walls looking sharp.

The Battle Against Condensation

Every shower or bath releases steam, and without a proper exit route, that moisture clings to walls and ceilings, soaking into the paintwork. Over time, this leads to bubbling, peeling, and dreaded black mould creeping into corners. The secret weapon? Ventilation.

Extractor Fans: The Hardest Working Player in the Room

A high-quality extractor fan is like a vacuum for humidity – pulling excess moisture out before it can settle where it shouldn’t. Positioning one correctly and running it during and after showers can make a world of difference in preventing damp patches and preserving the integrity of wet room coatings.

The Power of Fresh Air

Sometimes, the simplest solutions are the most effective. Cracking open a window, even for a short time, allows natural airflow to sweep away lingering humidity. In particularly humid conditions, leaving a door open can also help balance the air exchange and keep things dry.

Paint That Fights Back

Not all paints are cut out for high-moisture environments. Vapour-permeable paints let walls breathe while repelling excess moisture, reducing the risk of condensation buildup. Pairing these coatings with solid ventilation measures creates a defence system that keeps wet room surfaces looking fresh for years to come.

A little airflow today saves a whole lot of repainting tomorrow. Keep that air moving, and your wet room will thank you! Have a read of how to remove mould at our blog.

 

Understanding UK Wet Room Tanking Regulations

 

If you’re planning a wet room in the UK, you need to understand the strict waterproofing regulations that ensure these spaces remain leak-free and structurally sound. A wet room is designed to handle constant exposure to water, but without the right precautions, moisture can seep into walls and floors, causing serious damage over time. That’s why regulations require comprehensive tanking – the process of applying waterproof membranes, coatings, and sealants to create a fully watertight space.

The Legal Requirements: What the Regulations Say

In 2018, the British Standards Institute (BSI) made significant changes to how wet areas must be protected. Under BS 5385-1:2018, clause 6.1.1.3, it is now recommended that all domestic wet areas – not just commercial spaces – be fully tanked before tiling. This means that bathrooms, showers, wet rooms, and even steam rooms must have a waterproof membrane installed before any tiles are laid.

Tiles alone do not provide adequate waterproofing. Grouts and adhesives are not 100% waterproof, meaning moisture will eventually seep through, leading to dampness, mould growth, and structural issues. Without proper tanking, water can penetrate the substrate beneath the tiles, causing tiles to de-bond, and the damage can even spread to adjacent rooms.

Minimum Tanking Requirements

Building regulations require that wet rooms be tanked up to at least 1.5 metres around the shower area, ensuring that splashing and condensation do not lead to moisture damage. However, industry best practices often go beyond this, recommending full-floor tanking with wall coverage extending at least 300mm beyond any showerhead spray zone. This is particularly important for rooms with underfloor heating, as trapped moisture can cause structural weakening.

Why Compliance Matters

Failure to follow these regulations can lead to:

• Structural damage – Moisture can weaken floors, walls, and even the building’s foundations.
• Costly repairs – Untanked wet rooms may require complete removal and reinstallation to fix long-term water damage.
• Legal liability – Contractors could be held accountable for repairs, just as they would be in commercial installations.

For homeowners, ensuring compliance isn’t just about avoiding expensive repairs – it’s also about protecting the property’s value. A properly tanked wet room is a long-term investment in the home’s durability and functionality.

Other Key Building Regulations to Consider

Beyond waterproofing, several other building regulations apply to wet rooms:

• Ventilation (Part F Regulations): Wet rooms must have an extractor fan vented outside to reduce condensation and prevent damp buildup. Continuous ventilation is preferred.
• Drainage (Part H Regulations): The shower drainage system must be large enough to handle the water flow, with appropriately sized pipes and a water seal trap at every discharge point.
• Structural Integrity (Part A Regulations): If structural changes are made to install a wet room, they must comply with general construction rules for timber, concrete, or steel.

Investing in the Right Waterproofing System

To meet these legal standards, only approved waterproofing membranes, tanking kits, and sealants should be used. These products are designed to create a seamless, watertight barrier that protects the underlying structure. Investing in high-quality waterproofing is the best way to ensure compliance, prevent damage, and extend the life of the wet room.

For guidance on selecting the right waterproofing system for your project, consult a professional or check that the products meet BSI standards and current building regulations.

 

Does a Wet Room Increase the Risk of Damp?

 

Not if it’s done right! A properly built wet room shouldn’t invite damp into your home. But if waterproofing is half-hearted or ventilation is an afterthought, moisture can start making itself at home in all the wrong places.

The trick? Seal everything up tight and use high-performance waterproofing paints and coatings. Pair that with good airflow and a little regular upkeep, and you’ve got a wet room that stays fresh, functional, and free of damp. It all comes down to smart planning and the right materials – get those right, and your wet room will serve you well for years.