A sliding door wardrobe frame is built by fixing a top track to a level timber header, fixing a matching bottom track to the floor directly below it, and closing the two sides with vertical uprights or side panels. The doors then hang from rollers in the top track and are guided by the bottom track. Everything else in the build serves those two tracks: they must be parallel, plumb to each other and dead level, because sliding doors will not run properly on a frame that is out of true.
That is the principle. The execution needs a little care, particularly in British homes where floors are rarely level and walls are rarely plumb. This guide takes the build in order and flags the points where small errors become obvious later.
Start with the space, not the doors. Measure the width of the opening at floor level, at mid height and at ceiling height. Then measure the height at both ends and in the middle. Write all six figures down.
You will almost certainly find variation. A width difference of 10mm to 20mm across a chimney breast alcove is entirely normal in an older property. That variation determines your design: the frame has to be built to the narrowest width, with the gaps packed and covered afterwards, otherwise the doors will bind at the tight point.
Check the floor with a long spirit level. If the floor falls away from the wall, you will need to pack the bottom track level rather than following the floor line. Sliding doors hang plumb from the top track, so a bottom track that follows a sloping floor will give you a gap that grows across the run.
The top track needs something solid to fix into. If the ceiling has joists running the right way, you can fix a timber header directly into them. If the joists run parallel to the wardrobe front, you will need noggins between joists, or a header supported by the side uprights instead.
Use timber of at least 50mm by 50mm for the header, or 75mm by 50mm for a wide opening. Fix it with screws long enough to reach well into the joist, not just through the plasterboard. Plasterboard fixings alone will not hold the weight of two mirrored doors in motion.
Get the header level before anything else. Everything above and below references off it. If the ceiling itself slopes, and many do, level the header and pack the gap above with timber slips, then cover the gap with a slim fillet or scribe a cornice over it. Fighting a sloping ceiling by following it will cost you a working door.
Drop a plumb line or use a long level from the front edge of the top track down to the floor and mark the position. This is the single most important measurement in the build. The bottom track must sit directly beneath the top track, not offset by even a few millimetres, or the doors will lean and the rollers will wear on one side.
On timber floors, screw the bottom track through into the boards. On concrete, use a suitable masonry fixing, or bond the track down with a strong construction adhesive if you would rather not drill. Where the floor is out of level, pack under the track with thin timber or plastic shims at the fixing points and trim the packers back afterwards.
If the wardrobe is going over carpet, decide early whether the track sits on top of the carpet or on the floor beneath it. Fixing to the subfloor and cutting the carpet to the track gives a much more stable result, though it commits you to that position permanently.
The sides close the frame and stop the tracks from twisting. On a wall to wall installation, you can fix uprights directly to the side walls with plugs and screws, packing behind them where the wall bows.
Where one side is open, that upright is doing real structural work and needs to be substantial: a full depth panel of 18mm board, or a timber post braced back to the wall and fixed firmly at floor and ceiling. An unbraced open end will move every time a door slides, and that movement eventually shows as doors that no longer meet.
Check each upright for plumb in both directions before final fixing. A upright that leans front to back will pinch the door at top or bottom depending on which way it leans.
With the outer frame square, you can plan the inside. This is the part worth spending time on, because a sliding door wardrobe has one characteristic that hinged designs do not: you can only ever see part of the interior at once.
That has real consequences for layout. Place things you use daily in the section that is easiest to reach, and put seasonal storage behind the door that stays shut. Split the interior into a hanging bay and a shelved bay rather than running one long rail, because a rail that spans two door widths means you are always sliding doors to reach the middle.
Standard useful dimensions: allow 1000mm to 1100mm height for shirts and jackets on a double hang, 1400mm to 1500mm for long coats and dresses, and 580mm to 600mm internal depth for hanging clothes to sit square. Shelves for folded items work well at 300mm to 400mm spacing.
Sliding doors need around 100mm of frame depth just for the tracks and door thickness, so remember to add that to your hanging depth when setting the frame out from the wall. Forgetting this is why some home built sliding wardrobes end up with shoulders pressed against the doors.
Doors go in last, after the frame is complete and fixed. Lift the door so the top rollers engage in the top track first, then swing the bottom in so the guides locate in the bottom channel. Most systems then have an adjustment screw at the bottom of each door that raises or lowers that corner.
Use those adjusters. Slide the door to one end and check the gap against the upright along its full height. If the gap tapers, adjust the bottom rollers until the door edge sits parallel. Repeat for the second door, then check where the two doors overlap in the middle. Getting both doors plumb takes fifteen minutes and it is the difference between doors that glide and doors that judder.
Fit anti jump blocks or top guides if the system includes them. They stop a door lifting out of the track when it is pushed hard, which matters in a family bedroom.
You built the frame to the narrowest measurement, so there will be gaps at the sides and possibly at the top. Cover them with slim scribe fillets, packed and pinned to the frame, then caulked against the wall. A 5mm bead of decorators caulk along that junction, painted over, disappears completely.
At the base, a small skirting or a plinth fillet in front of the bottom track tidies the floor junction. Do not run it so high that it interferes with the door guides.
Building a frame from scratch makes sense when the opening is awkward, when you want floor to ceiling storage, or when nothing standard fits the space. It takes a weekend, requires a reasonable tool kit, and leaves you with something tailored to the room.
Where the opening is a straightforward rectangle against a flat wall, a ready built unit is usually the more sensible route. The tracks are already parallel, the doors are already square in the frame, and the whole thing arrives as a known quantity. Our modern sliding wardrobes UK sale range covers most common bedroom widths, and there is a wide range of finishes if you want mirrored fronts to bounce light around a smaller room.
It is also worth considering whether sliding is the right mechanism at all. Sliding doors save the swing space a hinged door needs, which is why they suit narrow bedrooms where a bed sits close to the wardrobe. Against that, you lose a little internal depth to the tracks and you can never open the whole front at once. If floor space is not the constraint, the modern 2 door wardrobes UK options give you full access to the interior in one movement.
Whichever route you take, plan the frame around the rest of the room rather than in isolation. A well built wardrobe sitting awkwardly beside mismatched storage is a common outcome. At Furniture in Fashion we hold coordinating bedroom pieces so a new wardrobe and the modern chest of drawers UK sale beside it read as one scheme, and you can shop modern furniture UK across the whole range in a single visit.
Allow around 100mm from the wall to the front of the frame for the tracks and door thickness, on top of the internal depth you want for hanging clothes. So a wardrobe with 600mm hanging depth needs roughly 700mm total.
Yes, in almost all systems. The bottom track guides the doors and keeps them from swinging. Fixing it with screws or a strong construction adhesive prevents it from creeping out of alignment.
You can, but the bottom track must be packed level rather than following the floor slope. Doors hang plumb from the top track, so a track that follows a slope will create a tapering gap.
50mm by 50mm is adequate for a standard two door opening, and 75mm by 50mm is better for wider runs or heavier mirrored doors. Fix into ceiling joists or noggins, never into plasterboard alone.
Juddering usually means the tracks are not parallel or the door is not plumb. Check that the bottom track sits directly under the top track, then use the roller adjusters to bring each door edge parallel with the frame upright.
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