If you’re like many other homeowners, you’ve probably thought about adding tiles in your kitchen or bathroom at some point, and why not? They’re durable, waterproof, easy to clean, and most importantly, they can really transform the look and feel of your space. Next stop, DIY, and this is where the same old question comes up over and over again: can you tile over painted surfaces?
Technically, yes you can. However, when tile adhesive bonds directly to a paint layer rather than the wall, the tiles are more likely to fall off. Now, there are a number of ways to overcome this when tiling your wall, ranging from scraping the paint off to prepping the surface correctly.
In this useful guide, you’ll learn everything you need to know about applying tiles to a painted wall. After which, you’ll be ready with all the knowledge and style ideas you need before visiting our expansive tile showroom in Derby, where you can browse our wide-ranging collection of wall, floor, bathroom and kitchen tiles.
Let’s get into it!
Can you tile over a painted surface?
The British Standards Institution (BS 5385-1:2018) says:
“Painted surfaces are generally unsuitable for tiling; a detailed examination of the painted surface should be made to decide whether it is suitable. Emulsion paint, lime-wash, distemper and similar finishes should be removed since they can possess poor adhesion to backing. Solvent based adhesives should not be used”.
Why tiling directly over paint can cause tile failure
While it might be possible in some cases, tiling directly over a painted surface is not generally recommended. From poor adhesion and paint failure to all-out tile failure, here’s a closer look at what could go wrong when you tile over painted surfaces:
- Poor adhesion – paint acts as a barrier between the tile adhesive and the underlying surface, reducing the bond strength.
- Paint failure – the adhesive can reactivate the paint, causing it to peel or bubble.
- Tile failure – weak adhesion can lead to tiles falling off, especially larger or heavier ones.
That being said, we understand how DIY is sometimes. When you’re short on time or don’t want to pay for a professional to do the job for you, tiling directly over painted surfaces can seem like the best option. If this is the route you choose to go down, whether that’s in your kitchen or bathroom suite, there are a few things you should consider before doing so.
What to consider before tiling over a painted surface
- Paint type – Gloss paint forms a slick, non-porous layer that offers poor mechanical grip for tile adhesive, unless thoroughly sanded/scored and primed. Emulsion/matte, while prone to moisture reactivation, is more porous and better for tile adhesive.
- Paint condition – The paint already on your walls must be firmly attached and free from cracks or peeling.
- Tile size – Whether you’re using ceramic tiles or other, a smaller-sized tile is more suitable as they are less likely to fall off.
- Preparation – The painted surface should be sanded, scored, and primed to improve adhesion. Liquid deglosser (also known as liquid sandpaper) can help remove the shiny finish.
- Adhesive – We recommend using a high-quality and flexible adhesive designed for difficult surfaces, such as a polymer-modified adhesive.
PRO TIP: Cross-hatch tape test – Use a sharp knife to lightly score an ‘X’ into the paint, cover it with strong gaffer tape, and pull it off firmly. If the paint peels off on the tape, the paint must be stripped completely before tiling.
For more expert tips like this, contact us to speak to one of our tiling experts, we’d be happy to help.
How to safely remove paint before tiling
For the best, risk-free tiling results, it’s recommended to remove the paint from your surface first, before tiling. But what’s the easiest way to do this? Here’s a quick two-step process you can follow before prepping your walls for new tiles.
1. Assess the paint
Determine if the paint on your wall is oil-based or water-based – oil-based paints are more difficult to remove. If your paint is peeling or flaking, that’s ok, it will actually be easier to remove.
2. Remove the paint
- Scraping: simply use a paint scraper or small knife to scrape off loose or peeling paint.
- Sanding: use medium-grit sandpaper to roughen the surface for better tile adhesion.
PRO TIP: Ensure the room is well ventilated if you decide to use any chemical strippers, and wear the correct safety gear. You can also test a small area of your wall before removing your paint to see which method works best for you.
Don’t forget to head to our Derby showroom to pick up the tiling tools and accessories you need to make your DIY job that little bit easier.
Step-by-step: How to prep your walls for tiling
Now that you’ve stripped your wall free of paint, it’s almost time to tile! Follow this step-by-step guide to prep your walls before tiling:
Step 1 – Clean the surface
Once you’ve scraped or steamed away your paint, there might be residue like dirt or grease. This can prevent your adhesive from sticking to the surface. We recommend using a damp sponge or cloth with a small amount of mild cleaner and warm water to remove the residue.
Step 2 – Key the surface
Score grooves (keying) into the wall to create an effective grip for the tile – this helps to maximise adhesion. Use sandpaper or score it with a knife or scraper. The rougher the surface, the stronger the tile adhesion will be.
Step 3 – Prime the surface
At this stage, you’ve achieved a more porous surface (plaster), and it’s time to apply a primer. This prevents an unwanted reaction between your cement-based adhesive and plaster, which can prevent adhesion. Now you’re ready to tile!
PRO TIP: Always ensure your primer is completely dry before tiling. Moist primer reacts poorly with tile adhesive and can lead to a bond failure, wasting all your preparation work.
Visit Raynesway Tile & Bathroom Warehouse for the best tiling products and advice
By getting to grips with this essential knowledge and advice around whether you can tile over paint, you’ll save time and money from poor adhesion and get the long-lasting, durable finish you need from tiling. Remember, the best option is to remove the paint first before prepping the surface for tiling. But if you do choose to tile directly over paint, always follow our tips above – and don’t forget to run the cross-hatch tape test first!
Whether you’re tiling your bathroom or kitchen, we’ve got a wide range of tiles to suit your DIY project. For the best advice and guidance around tiling, tools, and accessories, come and see us at the Raynesway Tile Warehouse showroom in Derby. Unsure about your wall prep? Bring a photo of your wall with you for expert tiler advice from one of our friendly professionals.
For more information, please don’t hesitate to get in touch or call us directly on 01332 492 106. A member of our team will be more than happy to help.
FAQs
Do I need to prime a painted wall before tiling?
Yes, you always need to prime a painted wall before tiling. Primer is the essential base layer needed for a process known as ‘chemical curing’ between the plaster and the tile adhesive to occur. Always wait for the primer to dry before applying the tile adhesive to ensure a strong, long-lasting bond with the tile. For better results, remove the paint first.
Will tile adhesive stick to painted walls?
In some cases, tile adhesive will stick to painted walls that have been sanded/scored, primed, and tested properly before application. Glossier paint is less porous and therefore less likely to grip adhesive than matte or emulsion paint.
The cross-hatch tape test can help you determine whether your painted surface is ready for adhesive after prepping. This entails scoring an ‘X’ into the paint, covering it with tape, and pulling it off firmly. If paint appears on the tape, then the wall must be stripped before adhesive is applied.
What are the best primers and adhesives for tiling?
Acrylic primers are great for porous surfaces, such as cement or plaster that has been sanded and scored. SBR bonding agents are good for all-round priming usage. Then, for a strong, long-lasting, water-resistant bond with a tile, we recommend using a polymer-modified adhesive.
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