How to hang mirrors and artwork: the complete DIY guide

Hanging something on a wall is four decisions, in this order: what the wall is made of, what the piece weighs, which fixing bridges the two, and how high it goes. Get the first three right and nothing falls down. Get the fourth right and the room looks composed rather than accidental.

The rest of this guide is the detail behind those four numbers: how to tell plasterboard from dot-and-dab in ten seconds, which anchor actually holds a 20 kg mirror, how to lay out a gallery wall on the floor before a single hole is drilled, and where in a wall you must never drill. If you would rather skip the drilling entirely, that is what our mirror and artwork hanging service is for.

Almost every hanging failure traces back to a wrong assumption here. British homes contain four common wall builds, and each takes a completely different fixing. Spend ninety seconds identifying yours.

Finding the studs

• Studs usually sit at 400 mm or 600 mm centres, so once you find one, measure across to find the rest.
• There is almost always a stud beside every door opening and at every internal corner.
• Sockets and switches are screwed to a stud or a noggin — a useful free clue about spacing.
• Confirm with two detector passes at different heights; a single reading can be a pipe or a cable.
• A 2 mm pilot hole in the pencil mark tells you the truth: gritty resistance is timber, free air is not.

Do not estimate the weight. Stand on bathroom scales holding the mirror, subtract your own weight, and work from the real figure. Framed glass is far heavier than people expect: a 60 x 90 cm mirror with a timber frame is routinely 12–18 kg, and a full-length leaner is often 25 kg or more.

The 50% rule

Every anchor carries a stated maximum load, measured in laboratory conditions in perfect board. Real walls have old screw holes, damp patches, thin skim and vibration from doors. Plan for each fixing to carry no more than half its rating, and split the weight across two fixings. A 16 kg mirror on two fixings is 8 kg each, so each anchor should be rated at 16 kg or better.

This is the chart worth screenshotting. Read across from your wall type and weight band, and buy the fixing before you start — the most common cause of a botched job is using the plug that came in the box with the mirror.

Four parts of this job deserve their own page. Each one is written to be read at the wall, with the tables and step-by-step detail in full:

• Hanging height and gallery walls — the hook-height formula, reference heights for sofas, beds and stairwells, and gallery-wall planning.
• The kit you need, and what to hire instead — a realistic £60 kit, UK buy prices against hire rates, and the hidden costs of hiring.
• Awkward walls and rented homes — lath and plaster, dot-and-dab, tile, chimney breasts, and what is safe to hang in a rental.
• The printable checklist (free PDF) — one page to tape beside the wall, plus the nine mistakes that crack walls.

Above roughly 25 kg, ordinary hooks stop being the right answer. A French cleat — a batten cut at 45 degrees, one half screwed to the wall and one half to the mirror — spreads the load across multiple fixings and lets the piece drop into place rather than being held out from the wall on two points.

Fitting a French cleat

• Use a 18–20 mm hardwood ply or timber batten cut lengthways at 45 degrees.
• Screw the wall half with the sloped face pointing up and into the wall, spanning at least two studs.
• Fix at 300 mm intervals — five screws across a 1.2 m batten is not overkill on a 40 kg mirror.
• Screw the mirror half sloped face down and out, set 10 mm below the top edge so the batten stays hidden.
• Add a spacer strip of the same thickness at the bottom of the mirror so it hangs flat rather than tilting.
• Never fix a cleat to plasterboard alone: it must reach timber studs or masonry.

Antique and frameless mirrors add two more problems: the silvering is fragile, and the mounting hardware is often original and fatigued. Replace old cord and hooks as a matter of course, support the mirror from underneath while you seat it, and never lay a large mirror flat on a hard floor while you work — stand it on a folded towel against a wall at a slight angle.

UK wiring practice runs cables in predictable places, and knowing them is what turns a detector reading into a decision. Treat these bands as live until proven otherwise:

• A 150 mm band below the ceiling line and along every internal corner.
• A vertical band running straight up and straight down from every socket, switch and fused spur.
• A horizontal band running left and right at the exact height of every socket and switch.
• The wall directly above and below a boiler, kitchen units, a bathroom or a shower — pipework as well as cable.
• Party walls and the wall behind a consumer unit, where cable density is highest.

Two more practical points: isolate the circuit at the consumer unit if you must drill anywhere near a safe zone, and be aware that homes built between roughly 1950 and 1999 may contain asbestos in wall boards, textured coatings and around old fireplaces. Never sand or drill an artex-style textured coating without checking — that job needs testing, not a dust mask.

Most hanging jobs are genuinely DIY. A handful are not, and they share one feature: the cost of getting it wrong is much higher than the cost of getting it done.

• The piece is over 30 kg, antique, or irreplaceable.
• The wall is lath and plaster, internally insulated, or you cannot identify it with confidence.
• The location is above a bed, a cot, a stairwell drop or anywhere a fall would hurt someone.
• Cables or pipes are known to run through the area and cannot be avoided.
• It is a gallery wall of eight or more frames — the layout time, not the drilling, is what costs you.
• You are in a rented home and a wrong hole comes out of your deposit.

Those figures sit inside the wider rate structure explained in the handyman hourly rate guide — and if you have several jobs waiting, a half day almost always beats booking them one at a time.

Wall construction in Greater Manchester is unusually mixed, and it is the single biggest reason a fixing that worked in one flat fails two miles away. Three broad building eras cover most of the county, and each behaves differently under a drill.

Mill and warehouse conversions — Ancoats, Northern Quarter, Castlefield, Salford Quays

Converted cotton mills off Great Ancoats Street and around Cutting Room Square are largely solid load-bearing brick, often a full brick-and-a-half thick, with hard lime or cement render over it. That is the best wall you can be given: a 7 mm or 8 mm masonry plug takes a heavy mirror comfortably. The catch is that these buildings frequently have exposed brick as a design feature, so holes are permanent and obvious — plan the layout on the floor first, and set out from the mortar joints where you can, because a plug in mortar is easier to make good than one through a Victorian facing brick. Newer towers around Deansgate and the Quays are the opposite: metal-stud partitions with a single 12.5 mm plasterboard skin, where anything over about 5 kg needs a metal toggle or a screw straight into the stud.

Victorian and Edwardian terraces — Chorlton, Levenshulme, Didsbury, Whalley Range, Prestwich

The byelaw terraces across south Manchester and Bury typically have solid brick external walls with no cavity, plus lath-and-plaster or later plasterboard-over-batten internal partitions. Chimney breasts are everywhere, and they are where people most want a mirror. Drill into the brick pier either side of the opening rather than into the breast face directly above a working fire, keep clear of the flue liner, and expect the first 15 mm of a lath wall to crumble — drill it on rotary only, never hammer. If the plaster comes away in a dinner-plate patch, that is a repair job before it is a hanging job.

Post-war and new-build estates — Wythenshawe, Salford, Middleton, Hulme

Estates from the 1960s onwards, and almost every new-build since 2000, use dot-and-dab: plasterboard stuck to blockwork with adhesive dabs, leaving a 20–30 mm void behind the board. A standard plasterboard plug in a dot-and-dab wall is the most common failure we are called out to fix in Greater Manchester, because the plug only ever grips the board. Use a through-fixing such as a Corefix or a long frame fixing that reaches the block behind, or find a dab and land the screw on it.

Practical local details worth knowing

• Leasehold apartments across the city centre, Salford Quays and MediaCity commonly restrict drilling into party and structural walls — check your lease before a heavy mirror goes up, not after.
• Student and short-let stock in Fallowfield, Withington and Hulme turns over hard every August; if you are hanging in a let, use over-door hooks or a French cleat you can lift off and make good in ten minutes.
• Loading bays around the Northern Quarter and Ancoats are tight and largely permit-controlled — book a slot or the ten-minute job becomes an hour.
• Older terraces in Levenshulme, Gorton and Openshaw often have surface-run or rerouted cabling from past rewires, so a detector reading matters more here than in a new-build.
• Damp on canal-side and basin properties in Castlefield and along the Rochdale Canal means stainless or plated fixings on any external-facing wall.

If you would rather not test which of the three you have, our mirror and artwork hanging service in Greater Manchester covers all 115 areas from Manchester city centre to Wigan, Stockport, Bolton and Oldham — you can find your own neighbourhood on the area directory.