Hanging Techniques

Wallpaper in Humid Rooms: How to Make It Last in Bathrooms and Kitchens

Bathrooms and kitchens generate steam and condensation that ordinary wallpaper cannot withstand — seams lift, the paper absorbs moisture and bubbles, and mould grows behind it within months. Done correctly, wallpaper in a humid room lasts as well as in a dry room. The keys are choosing a water-resistant paper, a mould-inhibiting paste, and ensuring the room is properly ventilated.

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Choose a vinyl or coated paper, not a standard printed paper

Standard printed wallpaper is permeable to water vapour and will absorb moisture from a steamy bathroom, causing it to swell at the seams and eventually peel. Vinyl wallpaper — either solid vinyl or vinyl-coated — has a plastic film face that resists surface moisture and can be wiped clean. Specialist bathroom wallpapers are typically vinyl-coated and often labelled as moisture-resistant or suitable for wet areas. Grasscloth and natural-fibre papers are not suitable for humid rooms — they absorb moisture and stain easily.

Use a heavy-duty paste with a mould inhibitor

Humidity promotes mould growth behind wallpaper as well as on its face. A standard paste does not contain a mould inhibitor and will allow mould to develop on the adhesive layer within months in a poorly ventilated bathroom. Heavy-duty pastes formulated for kitchens and bathrooms contain a fungicide or biocide that inhibits mould growth in the adhesive layer. Check the product label specifically for mould inhibitor or fungicidal properties — not all heavy-duty pastes include it.

Ventilation is the biggest factor in longevity — more than paper type

Even the most moisture-resistant paper will eventually fail in a room with no ventilation. Steam condenses on the back of the paper as well as the face, and condensation on the back causes adhesive failure over time. The single most effective step is ensuring the room has an extractor fan running during and after steam-generating activities, and that the fan is rated correctly for the room volume. In a bathroom without a window, a minimum 15 air changes per hour is recommended. Fit a timer-controlled or humidity-sensing fan rather than one that stops when the light goes off.

Prime and waterproof the substrate before hanging

In bathrooms, the wall behind the paper is often plaster that has experienced historic damp or minor leaks. Prime the surface with a diluted PVA sealer or a specific moisture-resistant primer before hanging to reduce moisture absorption through the substrate. In shower or splashback areas where water contact is likely, apply a waterproofing membrane (tanking compound) to the plaster before papering — do not hang paper in direct water contact areas without a waterproof barrier behind it.

Avoid papering directly above a bath, shower tray, or sink

Even vinyl-coated paper should not be in direct contact with water or continuous condensation drip points. Leave the lowest 15–20 cm above a bath or sink unpapeared and finish with a waterproof caulk or grout — this is the zone most exposed to splashes and condensation runoff. Above this clearance zone, vinyl wallpaper performs well. In a separate shower cubicle, use tiles or a solid surface panel in the wet zone and wallpaper on the remaining walls above the tile line.

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Common questions

What type of wallpaper is best for a bathroom?

Vinyl or vinyl-coated wallpaper is the standard choice for bathrooms. The vinyl face resists moisture and can be wiped clean. Avoid standard printed papers, fabric-backed papers, and natural-fibre wallcoverings — they absorb moisture and deteriorate quickly in a humid room.

How do I stop wallpaper going mouldy in a bathroom?

Use a heavy-duty paste with a built-in mould inhibitor (fungicidal paste), prime the substrate before hanging, and ensure the room has adequate mechanical ventilation — a correctly-rated extractor fan running during and after steam. These three steps together prevent mould growth on the adhesive layer, which is where bathroom wallpaper most commonly fails.

Can you wallpaper a bathroom with a shower?

Yes, with the right preparation. Tile or panel the wet zone (inside the shower enclosure and above the bath/tray) and use vinyl wallpaper on the remaining walls. Prime the plaster, use a fungicidal paste, and ensure a humidity-sensing extractor fan is fitted. Wallpaper should not be in direct water contact.