Clear the stairs before you lift a thing

Before anyone puts a hand on a wardrobe, spend ten minutes making the route safe. Most stair injuries happen not because the load is too heavy, but because someone trips, slips or snags a sleeve on the way past. The staircase in a typical British home is narrow — often around 80cm wide, with a tight turn at a half-landing — and that leaves very little margin for error once you are carrying something bulky.

Work through this list first:

• Remove stair gates, hall runners, loose carpet rods, plants, picture frames and anything sitting on the treads or the landing.
• Check the banister and spindles are secure. If the rail wobbles now, do not lean into it with 40kg of chest of drawers.
• Open every door on the route and, where you can, lift internal doors off their hinges to gain 4–5cm of clearance at the frame.
• Put down a rigid board or thick dust sheet on carpet or laminate so a heavy item can slide rather than dig in. Secure the edges so nobody catches a toe.
• Improve the lighting. Swap a dim bulb or two, or run a work lamp at the top of the stairs, so the person at the bottom can see the treads.

Wear proper shoes with grip — not socks, not sliders. Thin-soled trainers are ideal because you can feel the stair edge through them.

Decide honestly whether you can carry it at all

Two people can comfortably manage a load of roughly 25kg each close to the body, considerably less if the item is bulky, held out at arm's length or awkward to grip. A full chest of drawers, a cast-iron radiator, a solid oak desk or an upright piano all fall outside that. Be realistic and consider whether the item comes apart: drawers out, legs unscrewed, doors removed, glass shelves wrapped separately, bed frames flat-packed. Empty everything — books, crockery, tools — before the item leaves the floor.

Also measure before you strain. Check the width and depth of the item against the narrowest point on the stairs, the door frames at both ends and the diagonal clearance at the turn. If it genuinely will not fit, you need a different plan, and finding that out in the hallway is far better than finding it out halfway up.

Lifting technique that protects your back

Good technique is not complicated, but it has to be deliberate. Stand close to the load with feet shoulder-width apart, one foot slightly forward. Bend at the knees and hips, keep your back in its natural curve, and get a firm grip before you take any weight. Lift by straightening your legs, keeping the item close to your body and your shoulders level.

• Never twist while loaded. Move your feet instead — pivoting with a heavy load is how discs get hurt.
• Keep the load between waist and chest height wherever possible. Lifting above the shoulders puts far more strain on the lower back.
• Brace your stomach muscles as you take the weight and breathe out on the lift, not in.
• Set it down deliberately. Bend the knees, don't drop it, and don't let go until it is fully supported.
• Take a rest between carries. Shaking arms and a racing heart make the next lift far riskier.

Trolleys, straps and kit worth borrowing

You do not need much, but the right few items turn a dangerous job into a manageable one. A proper sack trolley or stair-climbing trolley handles boxes, washing machines and most white goods. Furniture sliders or a length of thick cardboard let you slide heavy pieces across landings. A two-person lifting strap or forearm harness keeps the load steady and frees your hands for the banister. Add gloves with grip, corner protectors, and a couple of ratchet straps to keep drawers and doors shut mid-carry.

If you are hiring a trolley, check it is rated comfortably above the weight you intend to move, and practise on the flat first. Stair-climbing trolleys behave very differently when loaded.

Going up: the step-by-step method

Two people, one in charge. The stronger person takes the bottom end, where most of the weight sits, and calls every move out loud — "ready, lift, step" — so nobody moves before everyone is set.

• Carry the item upright and close to the body, tilted slightly back towards the person at the top.
• Take one stair at a time in a steady rhythm, keeping your feet on the treads rather than the edges.
• At the half-landing, set the load down and reposition your grip before the turn. Never rotate a heavy item on the spot.
• Keep a hand near the rail where you safely can, and keep the path behind you clear for the person reversing upwards.
• Once upstairs, set the item down on a flat surface and straighten up slowly before you celebrate.

Know when to stop and call for help

Some jobs are worth paying for. Anything over about 50kg, awkward shapes such as pianos, safes, large American-style fridge freezers or glass-topped furniture, and anything that has to go through a window or over a balcony should go to a professional two- or three-person team with the right equipment and insurance. That is not defeat; it is the cheapest back surgery you will ever avoid.

If you do feel a sharp pull, stop immediately. Rest, apply ice for the first day or two, and see a GP or physiotherapist if the pain persists, travels down your leg or comes with numbness. A strained back can take weeks to settle, and no chest of drawers is worth that. Move slowly, plan the route, ask for help, and look after your spine — it has to last longer than the furniture.