Fit tongue-and-groove panelling to a dot-and-dab plasterboard wall

Fit tongue-and-groove panelling over a dot-and-dab wall by battening, fixing safely into the masonry behind, then boarding and finishing.

TG-01Confirm what's behind the plasterboardTap the wall in a grid pattern. Dot-and-dab feels mostly hollow with solid patches roughly every 300-600mm where the adhesive dabs sit; edges near doors, windows and corners are usually solid all the way (a noggin or timber batten). A timber stud wall sounds hollow between evenly spaced solid points (400-600mm apart) — a small pilot hole there brings out pale timber dust. A metal stud wall gives the same even spacing but a pilot hole brings out fine grey swarf; metal studs are common in flats and anything built or refitted since the 1990s. Lath and plaster feels uneven and slightly bouncy with thin ridges under the surface. This guide is written for dot-and-dab; if you find timber or metal studs instead, screw straight into the stud centres using the fixings described in the battening step rather than fixing through to masonry.

1 each · Stud and cable detector

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TG-02Check for cables and pipes, and find your stopcockCables and pipes can run almost anywhere in a wall, not just in the usual safe zones, and a cheap detector can miss cables that are deep, in metal conduit, or behind metal-backed plasterboard — a metal stud frame confuses detectors further. Sweep the whole fixing area with a detector, then still drill the first few millimetres of each hole carefully and stop if you feel resistance or see anything other than plaster and masonry dust. Before you drill anything, find your stopcock (usually under the kitchen sink) and check it turns freely, so you can shut the water off fast if you hit a pipe. If you have any doubt at all, isolate the relevant circuit at the consumer unit before drilling.

TG-03Clear and prepare the wallRemove the skirting board, any wall plates, curtain fittings and old fixings from the wall. Strip wallpaper if present and fill any large holes or cracks in the plasterboard with filler, then let it dry fully. Give the wall a wipe down to remove dust and grease so the battens sit properly.

1 tub · Multi-purpose filler

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1 each · Wallpaper scraper

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1 each · Dust sheet

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TG-04Mark and fix vertical battensMark vertical lines at 400mm centres across the wall to take the battens. On dot-and-dab, locate the dabs (the solid points found in step 1) along each line where possible — fixings need to pass through the plasterboard and gap behind into the masonry, not just grip the board. Drill a pilot hole sized for your wall plug, use a long masonry screw or frame fixing (typically 7.5 x 92mm) that clears the dab gap (often 10-40mm) plus at least 30mm into solid masonry, and check pull-out strength by hand before loading it further. If a mark falls only on the hollow between dabs, shift the batten slightly to land on solid backing rather than relying on a hollow-wall fixing alone. If you actually have a timber stud wall, use a 50-60mm wood screw driven into the centre of each stud. If you have a metal stud wall, never use a wood screw or plastic plug — they strip straight through 0.5mm steel — use a self-drilling metal-stud screw or a toggle-type hollow-wall anchor rated for the batten load, and add a timber noggin between studs if the panelling will be heavy or knocked about.

8 length · 25x50mm CLS timber batten

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30 each · Masonry frame fixings 7.5x92mm

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30 each · Metal-stud self-drilling screws

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10 each · Toggle-type hollow wall anchors

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TG-05Level and pack the battensCheck each batten with a spirit level and pack behind it with thin plywood or plastic shims wherever the wall dips, so the whole run sits flush and plumb. Use a long straight edge across several battens to check for a flat plane before you tighten every fixing fully.

1 pack · Packers/shims

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1 each · Straight edge

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TG-06Measure and cut the panelling boardsMeasure from floor to ceiling and subtract space for skirting and any coving or scotia trim you plan to fit. Cut boards to length with a fine-tooth saw or plunge saw, and lightly sand cut edges smooth.

20 each · Tongue-and-groove panelling boards

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1 each · Fine-tooth handsaw or plunge saw

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1 pack · Sandpaper 120 grit

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TG-07Fix the boards to the battensPlumb the first board carefully — every other board follows its line. Secret-nail through the tongue at a 45° angle into each batten, then slot the next board's groove over the tongue and tap it home gently with a block to protect the edge. Work steadily across the wall, checking plumb every few boards.

1 box · Panel pins/lost head nails 40mm

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1 each · Tapping block

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1 bottle · Wood glue

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TG-08Cut around sockets, switches and pipeworkIsolate the circuit at the consumer unit before removing or altering any faceplate, and don't restore power until everything is refitted safely. Mark and cut neatly around sockets and switches; panelling usually adds enough depth that you need a deeper mounting box or socket extender so the faceplate sits flush again. Fitting a deeper box is normally straightforward, but any new wiring, or electrical work in a bathroom's zoned areas, falls under Part P of the Building Regulations — get a qualified electrician if you're unsure.

RULES

2 each · Deep socket mounting box

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1 each · Insulated screwdriver set

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KNOW THE RULES

Part P of the Building Regulations covers notifiable electrical work, including some work in bathrooms and any new circuits — simply refitting a deeper faceplate is normally fine, but check if unsure.

TG-09Fit trims, scotia and skirtingFit internal or external corner trims where panelling meets a wall or reveal, and a scotia trim along the top edge to hide the join with the ceiling. Refit the original skirting or fit new skirting over the bottom edge of the panelling, mitring corners for a neat finish.

4 length · Corner trim

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6 length · Scotia beading

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6 length · Skirting board

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1 each · Mitre saw or mitre box

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1 tube · Panel adhesive

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TG-10Fill, sand and finishFill nail holes and any visible joints with a fine wood filler, let it dry, then sand smooth. Apply primer if painting, or your chosen varnish or oil if leaving the wood exposed, following the manufacturer's coverage and drying times, and apply a second coat once dry.

1 tub · Fine wood filler

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1 tin · Primer or varnish/oil

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1 each · Paintbrush or roller

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TG-11Tidy up and final checksVacuum dust from the floor and skirting, and bag up off-cuts for disposal at your local tip or timber recycling point. Give every board a firm push to check nothing has come loose, and if you altered any sockets, test them before relying on them again.

1 each · Vacuum cleaner

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3 each · Rubble/waste bags

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