Which Walls Can Be Printed On? The Surface Check
The Surface Decides, Not the Motif
Whether a wall can be printed on depends less on the motif than on the surface underneath. Modern UV direct printing puts images onto very different surfaces – from plaster and concrete to glass and tiles, wood and wallpaper. The only difference is whether we print directly or prepare the surface first. This article explains exactly that: which surfaces are suitable, which need preparation, and how to tell whether your wall is print-ready.
Key Takeaways
- Almost any firm, dry and clean surface can be printed on – the condition of the wall matters more than its material.
- Absorbent surfaces like raw concrete or brick need a primer; smooth ones like glass, tiles and metal need a bonding coat.
- Dark or coloured surfaces are printed with a white underprint (white ink) so the colours stay opaque.
- Loose, damp or contaminated walls must be repaired first – printing does not replace wall repair.
The Surfaces You Can Print On
Almost any vertical surface that is firm, dry and stable can be printed on. In practice, most walls fall into one of these groups:
- Painted walls, plaster, drywall and filled surfaces: the most common surfaces in homes, offices, schools and practices. Smooth, dry and light – usually printed directly.
- Concrete, cement, brick and textured walls: typical in car parks, industrial spaces, hospitality and outdoor projects. Printable, usually after a primer.
- Tiles, glass, metal and other smooth surfaces: kitchen splashbacks, bathrooms, glass partitions, reception and feature walls. These need a bonding coat before printing.
- Wood and decorative panels: plywood, MDF and coated panels print well; untreated wood absorbs ink unevenly and is sealed beforehand.
- Wallpaper and woodchip: many paper and non-woven wallpapers can be printed on as long as they are firmly attached – a motif can be applied without removing the old wallpaper.
Which motifs are possible – from logos and photos to abstract art – is covered in our article on what wall printing can bring to your walls. Here we focus on the surface beneath it.
Condition Before Material: When We Print Directly
Whether direct printing is possible depends less on the material than on the condition of the wall. A well-kept concrete wall is often more print-ready than a painted wall with flaking paint. For direct printing, the surface should meet these conditions:
- fully dried through, including deeper layers
- clean, with no dust, grease or cleaning residue
- existing coatings hold firmly and do not flake off
- no blistering, chalking, dampness or mould
- no holes, deep grooves or sharp edges
- the wall colour does not interfere with the motif (otherwise a white underprint helps)
When these conditions are met, we print straight onto the existing wall – no wallpapering, no cladding.
Which Surfaces Need Preparation?
Some surfaces are printable but not without pre-treatment. Preparation ensures the ink holds and the result stays even:
- Smooth, non-absorbent surfaces (glass, tiles, metal, acrylic): grease, dust, wax and silicone residue are removed thoroughly, then a bonding coat is applied so the ink adheres permanently.
- Porous, highly absorbent walls (raw cement, brick): without a primer, colours can look darker or bleed at the edges. A sealing primer creates an even print result.
- Dark or coloured surfaces: beneath the actual motif we apply a white underprint (white ink). It makes the colours opaque and true, even on strongly painted walls.
- Uneven or heavily textured walls: modern direct-printing systems sense the distance to the wall and compensate for slight unevenness automatically. Coarse textures are checked in advance.
- Dusty or chalky walls: loose material is removed, then a primer is applied before printing.
When a Wall Has to Be Repaired First
Not every wall is immediately ready to print. Direct printing can cover colour differences, but it cannot repair structural damage. Such cases need fixing first:
- Flaking paint and loose coatings: old, separating paint must be removed before printing so the new motif adheres firmly.
- Loose wallpaper: wallpaper with lifted edges, bubbles, open seams or large loose areas is not suitable for direct printing.
- Damp, mouldy or water-damaged walls: the source of the moisture is resolved first, then the wall must dry out completely.
- Oily or heavily contaminated surfaces: kitchen grease or industrial oils reduce adhesion; only cleaning, sanding or recoating helps here.
- Cracked, hollow or damaged walls: damage is repaired before printing – the wall must be sound.
The Surface Check Before Printing
Before every project we assess the surface using a fixed routine that determines whether we print directly or prepare first:
- Is the wall fully dry in all layers?
- Is the surface clean and free of grease, dust and residue?
- Is the wall colour light enough – or does it need a white underprint?
- Are the printable dimensions measured and obstacles marked?
- Do sockets, pipes or fittings interfere with placement?
- Do glass, tiles or metal need a bonding coat, including drying time?
- Are existing coatings or wallpapers really firmly attached?
Surfaces at a Glance
The table summarises which surfaces can be printed on, when direct printing applies and what preparation is typical.
| Surface | Printable? | Direct print? | Typical preparation |
|---|---|---|---|
| Painted wall | Yes | if in good condition | clean, check paint adhesion |
| Plaster / filler | Yes | usually | remove dust, prime if needed |
| Drywall | Yes | usually | confirm dryness, no chalking |
| Concrete / cement | Yes | depends on absorbency | clean, repair, apply primer |
| Brick / textured | Yes | depends on texture | remove dust, check joints |
| Wood / MDF | Yes | after sealing | apply suitable coating |
| Tiles / glass / metal | Yes | after preparation | clean, apply bonding coat |
| Wallpaper / woodchip | Some types | depends on condition | check adhesion and substrate |
| Loose / chalky wall | after repair | no | remove, rebuild surface |
| Damp / mouldy | after repair | no | resolve moisture, dry out |
Frequently Asked Questions About Wall Printing Surfaces
Can you print on wallpaper without removing it?
Yes, provided the wallpaper is firmly attached everywhere. Paper and non-woven wallpapers without lifted edges, bubbles or open seams can be printed on directly. If the wallpaper is coming loose in places, it is removed or repaired first so the motif holds evenly.
Can you print on tiles, glass or metal?
Yes. These smooth, non-absorbent surfaces are first cleaned of grease, dust and silicone residue and then given a bonding coat. The UV ink holds permanently on top – ideal for kitchen splashbacks, bathrooms or glass partitions.
Does the wall have to be white to be printed on?
No. Light walls are ideal, but dark or coloured surfaces are printed with a white underprint beneath the motif. This white-ink layer makes the colours opaque and true, so a clear image appears even on a strong background.
How do I know if my wall is suitable?
Check three things: is the wall dry, clean and firm? If nothing is flaking, there is no dampness and no loose areas, the wall is usually print-ready. If in doubt, we assess the surface on site and recommend the right preparation.
Does innenside handle the surface preparation?
Yes. We assess the surface, carry out priming and bonding, and coordinate any necessary repairs. That way the surface is safely prepared before printing. For how a project runs overall, see our article on having a wall printed.
Conclusion: The Surface First, Then the Motif
Almost any wall can be printed on – what matters is its condition, not its material. Dry, firm and clean surfaces are printed directly, absorbent and smooth surfaces are primed first, and damaged ones are repaired before printing. Once the surface is settled, nothing stands in the way of the motif. Our page on wall printing costs and benefits breaks down how the cost per square metre is calculated.