Panelling is only as sound as the wall behind it. Most disappointing jobs are not fitting failures; they are a good panel fixed to a bad surface. Blown plaster, wallpaper left on, artex, or a wall carrying damp will all show through eventually.
This guide covers how to check what you have, what needs doing first, and when to abandon direct fixing and batten out instead.
Test the wall before anything else
Three checks take ten minutes and decide the whole approach.
First, tap along the wall with your knuckles. A solid dull sound is fine; a hollow drummy sound means the plaster has lost its bond with the substrate and will come away, taking the panelling with it. Blown areas need hacking off and making good.
Second, hold a long straightedge or spirit level against the wall in several directions. Gaps of more than about 5mm over a 2m length mean the wall is not flat enough to fix panelling directly to; it will rock and the joints will not close.
Third, look and smell for damp. Tide marks, salting, bubbling paint, a musty smell or cold patches all need investigating before you cover them.
- Knuckle test for hollow, blown plaster
- Straightedge test — over 5mm in 2m means batten out
- Check for damp, salting and bubbling before covering anything
- Check what is behind: solid masonry, stud, or lath and plaster
Direct fixing versus battening
On a flat, sound, dry wall, panelling can be bonded with grab adhesive and pinned. It is quicker, cheaper and loses no room width — usually the right choice in a modern house with skimmed plasterboard.
Battening out means fixing timber battens to the wall, packed to a flat plane, and fixing the panelling to those. It costs more and loses 25mm to 40mm of room width on that wall, but it solves several problems at once: it flattens an uneven wall, it creates an air gap on a cold external wall, it gives you a route for cables, and it gives solid fixings on a wall that will not hold anything.
Batten out where the wall is bowed, where it is a solid external wall, where lighting or sockets are being integrated, and in older properties generally.
Lath and plaster walls
Older houses often have lath and plaster on the internal partitions and sometimes on external walls. It is fragile, and grab adhesive on it is a gamble — the adhesive can hold while the plaster lets go.
The correct approach is to locate the studs, usually at 350mm to 400mm centres, and batten vertically into them. Then the panelling is carried by the structure, not by 120-year-old plaster.
Be careful with fixings: long screws into lath and plaster can split the laths and crack a large area. Pilot everything, and use screws long enough to bite properly into the stud behind.
Artex and textured walls
Artex is common on walls and ceilings in houses from the 1960s to the 1990s. It cannot be panelled over directly because the surface is not flat and adhesive will not key reliably.
The two options are to overboard or skim the wall flat first, or to batten out and fix the panelling to the battens, leaving the artex untouched behind. Battening is usually cheaper and avoids disturbing the surface.
That last point matters. Textured coatings applied before the year 2000 may contain asbestos. Do not sand, scrape or drill extensively into artex of unknown age without having it tested. If in doubt, batten over it rather than remove it, and take advice.
Wallpaper
Strip it. This is not negotiable for shaker-style panelling, where the recessed panel is your finished surface — you will be painting directly onto whatever is there, and paper seams, patterns and old paste will all telegraph through.
Even for tongue and groove that covers the wall completely, paper behind the boards is a poor idea: the paste can hold moisture and the paper can lift, breaking the adhesive bond.
After stripping, wash off the residual paste, let the wall dry properly, fill any damage and prime bare plaster. That is a day's work and it is the difference between a wall that looks good in year five and one that does not.
Damp walls
Panelling over a damp wall is the worst thing you can do to it. The moisture does not go away; it is simply trapped where you cannot see it, and it will rot timber battens and swell MDF from behind.
Identify the cause first: penetrating damp from a defect outside, rising damp, or — much more commonly — condensation from poor ventilation. Condensation is a heating and ventilation problem and can often be resolved without any building work.
Once the cause is fixed and the wall has dried, panel with battens rather than direct fixing so air can move behind the boards, and use moisture-resistant board throughout.
New plaster
Freshly skimmed plaster needs to dry before it is covered. As a rule of thumb allow a week for a skim coat over plasterboard and considerably longer for a full render and skim on masonry — up to a month in cold weather.
The plaster should be a uniform pale colour with no dark patches before anything goes on it. Then mist-coat it with thinned emulsion so the surface is sealed, and panel over that.
Common questions
- Can you fit wall panelling over wallpaper?
- No. Strip the paper, wash off the paste and make good first. With shaker panelling the wall itself is the finished panel surface, so anything left underneath will show.
- Can you panel over artex?
- Not directly. Either skim or overboard the wall flat, or batten out and fix to the battens. Textured coatings from before 2000 may contain asbestos, so do not sand or scrape them.
- Do I need to batten out for wall panelling?
- Only if the wall is uneven by more than about 5mm over 2m, is lath and plaster, is a solid external wall, or if you are integrating cables and lighting.
- Can I panel a damp wall?
- Not until the cause is fixed and the wall has dried. Panelling traps moisture and will rot battens and swell board from behind.
Read next