Painting Over Wallpaper: Should You Do It?

It is one of the most common questions we are asked by homeowners across London: "Can I just paint over the wallpaper?" The answer, as with so many things in decorating, is "it depends." Sometimes painting over wallpaper is a perfectly reasonable approach that saves time and money. Other times, it leads to a result that looks poor immediately, deteriorates rapidly, and ultimately costs more to fix than removing the wallpaper would have done in the first place.

This guide explains when painting over wallpaper works, when it does not, the correct technique if you decide to proceed, how to remove wallpaper properly when that is the better option, and why lining paper deserves serious consideration as an alternative.

When Painting Over Wallpaper Can Work

Painting over wallpaper is viable when all of the following conditions are met:

The Wallpaper Is in Good Condition

The wallpaper must be firmly adhered to the wall across its entire surface, with no peeling edges, lifting seams, bubbles, or areas of delamination. If any part of the wallpaper is coming away from the wall, painting over it will make the problem worse because the moisture in the paint will further weaken the adhesive.

Test adhesion by pressing firmly along the seams and in the corners. Run your hand across the surface feeling for bubbles or hollow areas. If the paper is sound throughout, it passes this test.

The Wallpaper Is Smooth

Heavily textured wallpapers, including woodchip, anaglypta, embossed vinyl, and deeply textured blown vinyl, will show their texture through the paint. If you paint over woodchip wallpaper, you end up with painted woodchip wallpaper, which looks exactly as uninspiring as it sounds.

Smooth, flat wallpapers, such as plain lining paper, smooth vinyl, or flat-printed papers, can be painted over successfully because the texture of the paper is not visible through the paint.

The Wallpaper Is Not Metallic or Foil

Metallic and foil wallpapers have a non-porous surface that paint will not adhere to reliably. Even with a primer, the bond between paint and metallic paper is weak, and peeling is likely over time.

The Pattern Will Not Show Through

Strongly coloured or heavily patterned wallpapers may show through paint, particularly if you are applying a lighter colour over a darker pattern. Multiple coats and a good primer can mitigate this, but on very bold patterns (think large-scale florals or deep geometric designs), the ghost of the pattern may remain visible, especially in raking light.

There Is Only One Layer

If the wall has multiple layers of wallpaper applied one over another, painting over the top adds yet another layer to an increasingly unstable sandwich. The weight of multiple layers, combined with the moisture from painting, can cause the entire assembly to pull away from the wall. If you suspect multiple layers, it is better to strip back to bare plaster.

When You Should Not Paint Over Wallpaper

The following situations call for wallpaper removal rather than painting over:

Peeling or Lifting Paper

Any wallpaper that is peeling, bubbling, or lifting at the seams will only get worse when painted. The moisture in the paint reactivates old paste and accelerates the failure. You will end up with painted wallpaper peeling off the wall, which is harder to deal with than plain wallpaper peeling off the wall.

Textured or Embossed Papers

As noted above, texture shows through paint. If you want smooth walls, the textured paper must come off. This includes woodchip, blown vinyl, anaglypta, and any paper with a raised pattern.

Vinyl Wallpapers (with Caveats)

Standard vinyl wallpapers have a non-porous surface that resists paint adhesion. Paint applied directly to vinyl will peel, usually starting at the edges within weeks or months. However, if the vinyl is keyed with sandpaper and a suitable primer is applied (Zinsser BIN or Bulls Eye 1-2-3), paint will adhere adequately. This is an acceptable approach for short-term solutions but is not a long-term decorating strategy.

Damp or Water-Damaged Walls

If the wall behind the wallpaper has damp issues, painting over conceals the problem without solving it. The damp will continue to deteriorate both the wall and the wallpaper behind the paint, eventually manifesting as mould, staining, or paper failure. Address the damp first, then strip the damaged wallpaper, and redecorate onto a dry surface.

When Selling or Letting

If you are preparing a property for sale or for a new tenant, painting over wallpaper is a false economy. Surveyors and experienced estate agents will notice, and it signals that corners have been cut. In London's competitive property market, particularly in areas like Mayfair, Chelsea, and Hampstead, buyers and tenants expect properly prepared walls.

The Correct Technique for Painting Over Wallpaper

If you have assessed the wallpaper and determined that painting over it is appropriate, here is the correct process:

Step 1: Repair Any Damage

Stick down any slightly loose edges using wallpaper overlap adhesive (available from most decorating suppliers). Fill any small tears or holes with a fine surface filler, applied thinly and sanded smooth once dry.

Step 2: Clean the Surface

Wash the wallpaper with a solution of sugar soap and warm water to remove grease, dust, and dirt. Allow it to dry thoroughly before proceeding. This step is frequently skipped and frequently the cause of paint adhesion failure.

Step 3: Seal the Surface

Apply a coat of primer-sealer to the entire surface. The primer serves several purposes: it seals the paper, it provides a uniform base for the topcoat, it improves adhesion, and it helps prevent the pattern from showing through.

The best primers for this application are:

• Zinsser Bulls Eye 1-2-3. Water-based, low odour, excellent adhesion to wallpaper, and good pattern-hiding properties. This is our standard recommendation.
• Zinsser BIN. Shellac-based, superior stain blocking and pattern hiding, but with a strong odour that requires good ventilation. Use this for heavily patterned or stained papers.
• Dulux Trade Supermatt. Not technically a primer, but this ultra-matt emulsion is sometimes used as a mist coat over wallpaper to seal it before applying the topcoat. It works adequately on plain papers but does not block patterns as effectively as a dedicated primer.

Step 4: Apply the Topcoat

Once the primer is dry, apply two coats of your chosen emulsion. Use a medium-pile roller for walls and cut in with a brush at edges. Pay particular attention to the wallpaper seams: roller lightly across them rather than along them to avoid catching and lifting the edges.

Step 5: Inspect in Raking Light

After the first topcoat has dried, inspect the surface in raking light (light shining across the surface at a low angle). This will reveal any seams, bubbles, or texture that are not visible in direct light. If seams are showing, a third coat may help, but if the issue is pronounced, no number of paint coats will disguise it.

How to Remove Wallpaper Properly

When painting over wallpaper is not appropriate, the wallpaper needs to come off. The method depends on the type of paper.

Strippable Papers

Some modern wallpapers, particularly those described as "paste the wall" papers from manufacturers like Cole & Son, Farrow & Ball, and Harlequin, are designed to strip cleanly. The paper peels away from the wall in sheets when pulled from the bottom corner. The paste remains on the wall and can be washed off with warm water and a sponge.

These papers are a pleasure to remove and leave a clean surface that requires minimal preparation before redecorating. If you are choosing new wallpaper and anticipate wanting to change it in the future, strippable papers are worth specifying.

Vinyl and Vinyl-Coated Papers

Vinyl papers have a waterproof top layer that prevents water or steam from reaching the paste beneath. To remove them, score the surface with a wallpaper scoring tool (the Zinsser PaperTiger is the standard), then apply water or steam through the scores to soften the paste.

Once the paste has softened, the paper can be scraped off with a broad scraper. The vinyl top layer often peels away easily, leaving a paper backing that is quicker to soak and remove.

Paste-the-Paper Papers (Traditional)

Traditional wallpapers that were pasted and hung in the conventional way respond well to soaking with warm water. Use a spray bottle or a sponge to saturate the paper, wait five to ten minutes, and scrape it off with a broad scraper. Stubborn areas can be re-soaked and scraped again.

Adding a small amount of washing-up liquid or a specialist wallpaper stripper solution (such as Zinsser DIF) to the water helps break down the paste more effectively.

Steam Stripping

A wallpaper steamer is the most effective tool for removing stubborn papers, multiple layers, or papers applied to unlined plaster. The steam plate is held against the wall for ten to fifteen seconds, softening the paste beneath, and the paper is then scraped away.

Professional steamers are more powerful and effective than the small domestic models available from DIY shops. For a single room, hiring a professional-grade steamer is worthwhile.

Post-Stripping Preparation

Once all wallpaper is removed, the bare wall needs preparation before painting:

1. Wash the wall with warm water and a sponge to remove all remaining paste residue. Old paste left on the wall will prevent paint from adhering properly.
2. Allow to dry thoroughly. Walls that have been soaked with water need at least twenty-four hours to dry.
3. Fill and sand any damage. Wallpaper removal often reveals minor plaster damage: small gouges from the scraper, areas where the plaster surface has pulled away with the paper, or old holes and cracks that were hidden by the wallpaper.
4. Mist coat. Bare plaster or previously wallpapered walls should receive a mist coat before full decoration. A mist coat is emulsion paint diluted with water (typically 70:30 paint to water) that soaks into the plaster and provides a sealed, uniform surface for subsequent coats.

Lining Paper: The Professional Alternative

For many situations, neither painting over existing wallpaper nor painting onto bare stripped walls gives the best result. The professional alternative is lining paper, and it is one of the most underappreciated products in decorating.

What Is Lining Paper?

Lining paper is plain, unprinted paper applied to walls before painting or wallpapering. It provides a smooth, uniform surface that covers minor imperfections, hairline cracks, and textural variations in the plaster beneath. It comes in various grades, measured by weight, from 800 grade (the lightest) to 2000 grade (the heaviest and most opaque).

Why Professional Decorators Love It

Lining paper offers several advantages:

It covers imperfections. Old plaster walls, particularly in London's period properties, are rarely perfectly smooth. They have been patched, filled, repainted, and wallpapered multiple times over a hundred or more years. Lining paper smooths over this history, providing a fresh, even surface.

It provides a consistent base. Different areas of a wall may have different levels of porosity, particularly if patches have been repaired with different plasters or fillers. These variations can cause uneven paint absorption, leading to a blotchy appearance. Lining paper provides a consistent base with uniform porosity.

It is easier to maintain. If a wall is damaged, the lining paper can be patched locally without the need to repaint the entire wall. In high-end London properties, this is a practical advantage.

It bridges hairline cracks. The paper spans small cracks in the plaster that might otherwise reappear through paint within months of decoration. This is particularly valuable in older properties with seasonal movement.

How Lining Paper Is Applied

Lining paper is hung horizontally (known as cross-lining) when it will be painted over. This ensures that the seams of the lining paper do not align with the seams of any subsequent wallpaper, and it minimises the visibility of seams under paint.

The process involves:

1. Size the walls. Apply a diluted wallpaper paste to the walls and allow it to dry. This seals the surface and provides a consistent base for hanging.
2. Cut and paste the lining paper. Cut lengths to the width of the wall, apply paste, and allow the paper to soak for the recommended time (typically five minutes for standard grades).
3. Hang horizontally. Start at the top of the wall, butting each strip against the previous one without overlapping.
4. Smooth and trim. Use a wallpaper brush to smooth the paper onto the wall, removing air bubbles. Trim at corners and edges with a sharp blade.
5. Allow to dry thoroughly. Lining paper must be completely dry before painting, typically twenty-four hours.

Our wallpaper installation service includes professional cross-lining as standard when we are preparing walls for painting in properties where the existing surface quality requires it. We also hang decorative wallpapers from all major manufacturers, including Cole & Son, de Gournay, Zuber, Fromental, and Farrow & Ball.

When to Specify Lining Paper

We recommend lining paper in the following situations:

• Walls that have been stripped of old wallpaper and have a rough or uneven surface.
• Old plaster walls with multiple patch repairs of different ages and materials.
• Walls with hairline cracks that are likely to reappear through paint.
• Before hanging expensive decorative wallpaper, to provide a perfect, smooth base.
• In any situation where you want the best possible foundation for a high-quality paint finish.

When Lining Paper Is Not Necessary

Lining paper is not always needed. Modern plasterboard walls in good condition, recently skim-plastered walls, and walls that are already smooth and well-prepared can be painted directly without lining paper. Adding lining paper in these situations adds cost without meaningful benefit.

Making the Decision: A Practical Framework

Here is a simple framework for deciding how to proceed when you are faced with wallpapered walls that you want to paint:

Is the wallpaper smooth, firmly adhered, and in good condition?

• Yes: Painting over is a viable option. Prime and paint.
• No: The wallpaper needs to come off.

Once the wallpaper is off, is the wall smooth and in good condition?

• Yes: Mist coat and paint directly.
• No: Hang lining paper, then paint.

Are you preparing the property for sale, for a new tenancy, or undertaking a significant redecoration?

• Yes: Remove the wallpaper regardless of its condition. Prepare the walls properly. Consider lining paper.
• No: If the wallpaper is in good condition, painting over is a reasonable short-to-medium-term solution.

This framework simplifies a decision that can otherwise feel overwhelming. The right answer depends on the condition of the existing paper, the condition of the walls beneath, the standard of finish you require, and your budget and timeline.

The Professional Perspective

In our experience across thousands of London properties, from studio flats in Fulham to grand houses in Hampstead, the most common mistake homeowners make is painting over wallpaper that should have been removed. The short-term saving in time and cost is typically outweighed by a result that looks compromised and may need redoing within a few years.

Conversely, the most common mistake that overly cautious homeowners make is insisting on stripping wallpaper that is in perfectly good condition and could have been painted over successfully. Not every wall needs to be taken back to bare plaster.

The skill lies in assessing each wall on its merits and making the right call. This is something that experienced decorators do instinctively, drawing on years of seeing what works and what does not across every type of wall surface and wallpaper. If you are unsure, a professional assessment before you commit to a course of action can save significant time and money.

Our interior painting service includes an initial assessment of all surfaces, with honest advice on whether existing wallpaper can be painted over, needs removing, or would benefit from lining paper before decoration. We would rather give you the right advice at the start than deal with the consequences of the wrong decision later.