How to hang a mirror, including heavy and full length mirrors

Hanging a mirror is a twenty-minute job if everything is to hand and an afternoon if it is not. For a mirror under 10kg you need a tape measure, a pencil, a spirit level, a drill with the right bit for your wall, a screwdriver and the fixings. For anything heavier add a second person, a stud finder or a strong magnet for plasterboard walls, and masking tape to mark the outline on the wall first.

Check the back of the mirror before you buy fixings. Most framed mirrors carry two D-rings, a hanging wire, keyhole slots or a split batten. Frameless mirrors may have mirror clips or a bonded hanging plate. Each works differently, and the fixings have to match both the hardware and the wall.

UK homes have four common wall types and each takes a different fixing. Solid brick or block, found in most houses built before the 1980s and in all external walls, holds screws in wall plugs without fuss. Plasterboard on timber studs, the norm for internal walls in anything built since the 1970s, is strong only where the studs are. Dot and dab, which is plasterboard stuck to a masonry wall with blobs of adhesive, has a 10mm to 25mm gap behind the board that defeats short fixings. Metal stud, common in flats and modern builds, needs fixings that bite thin steel rather than timber.

The tap test tells you most of it. Knock the wall with a knuckle: a dull, solid thud is masonry, a hollow drum is plasterboard. On a hollow wall, tap along it in a line and listen for the sound going dull every 400mm or 600mm; that is a stud. A magnet dragged along the wall will stick to the drywall screws holding the board to the studs, which is the quickest way to find them without a detector. If you drill a pilot hole and get red or grey dust, it is masonry; white powder means plasterboard; if the bit goes through a board and then hits something hard a short way behind, it is dot and dab.

The hanging hardware decides how the weight reaches the wall. A hanging wire between two D-rings is the oldest method and the weakest, because the wire pulls the fixing outwards as well as down and the mirror swings. It is fine under 10kg. Two D-rings hung directly on two screws, with no wire, keep the mirror flat and spread the load across two fixings; this is the default for 10kg to 25kg framed mirrors and the way most of our arch mirrors arrive. Keyhole slots do the same job with a cleaner finish and hold the mirror tight to the wall, which suits hallways where a swinging mirror gets knocked.

Above 25kg, or for anything wide, a split batten or French cleat is the method the trade uses. One half screws to the wall across two fixings or two studs, the other is fixed to the mirror, and the mirror simply drops onto the wall half. The weight runs straight down into the wall rather than pulling outward, and the mirror cannot swing. Most of our large full length mirrors and window mirrors over 180cm use one.

Whatever the hardware, check its rating. A D-ring screwed into a thin MDF frame with 10mm screws is the weak link on a 30kg mirror, not the wall. If the ring flexes when you pull it, add a second pair or move to a batten.

For a full length mirror the centre of the glass should sit about 150cm from the floor, which puts an average adult's face in the middle. The bottom edge then lands between 30cm and 60cm up depending on the mirror height. If that leaves your feet cut off, lower it; feet matter more than an exact centre line. A 160cm mirror hung with its base at 35cm shows head to toe for anyone up to about 185cm. The size guide has the working.

Over furniture the rule changes. A mirror above a console, chest or sideboard should sit 15cm to 20cm above the surface so the two read as one piece, and the centre lands around 150cm to 160cm. Above a sofa, leave 20cm to 25cm so heads do not knock it. In a hallway with a radiator below, keep 15cm of clearance so heat does not dry the backing.

Mark the hanging points before you drill. Measure the distance from the top of the frame down to the D-ring or keyhole, and the distance between the two rings. Transfer both to the wall from your chosen top edge and check the two marks with a level. For keyholes, measure centre to centre; for a batten, mark the batten's top edge.

This is the method for a framed mirror of 10kg to 30kg with two D-rings or keyholes. For a batten or cleat, the wall half replaces the two screws and everything else is the same.

Plasterboard is the wall most people worry about, and the worry is justified for the wrong fixings and misplaced for the right ones. The board itself is only 9.5mm or 12.5mm of gypsum, which crumbles under a point load. Everything about hanging a heavy mirror on plasterboard is about either reaching the timber behind it or spreading the load across enough board that it cannot crumble.

The best answer is always the studs. A 50mm wood screw into a timber stud holds 30kg on its own. If the stud spacing does not suit the hanging points, screw a timber batten across two studs and hang the mirror from the batten, which also lets you position the mirror anywhere along it. If there is no stud where you need one, hollow wall anchors, the metal type you set with a tool, hold 15kg each in 12.5mm board; spring toggles and heavy-duty toggles hold more but need a bigger hole. Spread the mirror across two fixings and treat the total rating as the lower of the two, not the sum.

Dot and dab is the trap. A standard hollow wall anchor opens in the void behind the board and grips nothing, because the void is only a few centimetres before solid masonry. The fix is a long frame fixing, 100mm or more, drilled through the board and the gap into the block behind, which turns the problem into a masonry fixing. If you are not sure whether a wall is dot and dab, a pilot hole tells you: the bit goes through the board, drops through the gap, then hits something hard.

Yes, up to a point, and the point is about 5kg. Adhesive strips and "no nails" grab adhesives are tested on small, light frames on smooth, painted, dust-free walls. The packaging numbers assume perfect conditions and are per strip, so a mirror needs several and the whole system is only as good as the weakest patch of paint. On wallpaper, fresh emulsion, textured plaster or a kitchen wall with a film of grease, the holding power drops sharply and the failure is sudden. For a 2kg bathroom mirror or a small round mirror, strips are fine. For a full length mirror at 12kg to 35kg, they are not a fixing; they are a delay.

If you cannot drill, the honest alternatives are a free standing mirror on its own stand, or a leaner mirror resting against the wall with a single small screw eye and cable at the top as an anti-tip, which is covered in how to secure a leaning mirror. Renters can usually get that one screw past a landlord where a row of plugs would not pass, and a single filled hole is invisible at checkout.

Bathrooms add humidity and tiles. Humidity attacks the silver on the back of the mirror at the edges, which is why bathroom mirrors should have a copper-free, sealed backing and a small gap behind them for air to move. Mirror clips or a cleat give that gap; adhesive pads do not.

Tiles need a tile bit, a slow drill speed with no hammer action, and a cross of masking tape on the tile to stop the bit skating. Drill through the tile and into whatever is behind, then fix for that wall as above. Aim for the tile body rather than the grout line, which crumbles. Through tiles on plasterboard the fixing has to be long enough to pass the tile, the adhesive and the board before it opens, so check the anchor length against the stack. In a shower zone, seal around the fixing with silicone so water does not reach the board.

Nearly every mirror that comes off a wall does so for one of a handful of reasons, and none of them is the mirror. Hanging wire on a heavy frame, which stretches, frays and pulls the fixings out at an angle. Picture hooks on plasterboard carrying ten times their rating. A single fixing where two were needed, so the whole load sits on one anchor. The thin screws that come free with a packet of plugs, which shear. A dot and dab wall treated as hollow plasterboard. And the one that is most common of all: nobody checked the D-rings, which were screwed into 12mm of soft frame with 8mm screws and simply pulled out.

The cure is the same every time. Use two fixings, rated above the weight, in the right wall, with the mirror hung flat on them. Then push on it. If it moves, it is not finished.

Every mirror on this site states its weight and its hanging hardware on the product page. The entry range from the UK warehouse ships with two D-rings fitted and a pair of screws and plugs suitable for masonry; for plasterboard you supply the anchors. The designer range ships with pre-fitted hanging hardware and a fixing kit, and the 180cm and 200cm pieces come with a split batten. All of it is delivered to the door; see delivery for the two-person service on the large sizes, and the damage guarantee for what happens if the box arrives damaged. If you tell us the wall type when you order, we will tell you what fixings to buy.