Whether you are between homes in Bromley, downsizing in Beckenham or simply clearing space in a busy family house, a self-store unit is a practical answer. But furniture is not designed to sit still in a cold, still room for months on end, and the biggest threat is not theft or knocks — it is moisture. Get the preparation right and your sofa, dining table and mattress will come out looking exactly as they went in.

Start With Furniture That Is Genuinely Clean and Dry

Damp is the enemy of stored furniture, and it rarely announces itself. A wardrobe wiped down with a wet cloth and shut away for six months can come out smelling of the inside of a cellar. Before anything leaves the house, follow a simple rule: clean it, then give it time.

• Vacuum upholstery thoroughly with a soft brush attachment, including under cushions and along the seams where crumbs and pet hair collect.
• Wipe hard surfaces such as wood, veneer and metal with a cloth that is barely damp — not wet — then buff dry immediately.
• Treat leather with a dedicated conditioner so it does not crack or dry out in an unheated unit.
• Leave everything to air for at least twenty-four hours in a heated room before it goes anywhere near a van.
• Never store anything that has been in a flood, a leaky garage or a damp shed until it has been properly dried and checked.

If you are storing a fridge, freezer or washing machine, drain and dry it completely, and leave the door wedged open so mould cannot take hold inside.

Cover Properly, but Do Not Suffocate

Covers are there to block dust, not to seal moisture in. This is where a lot of well-meaning packing goes wrong.

• Use breathable options: cotton dust sheets, old bed sheets or purpose-made furniture covers.
• Avoid wrapping entire items in plastic sheeting or shrink wrap for long periods — condensation forms underneath and has nowhere to go.
• Bubble wrap is excellent for corners, edges and feet, so use it there rather than over whole surfaces.
• Mattresses should go into a breathable mattress bag rather than being taped inside plastic.
• Remove sofa and chair cushions where possible, pop them in a cover of their own, and stack them flat to keep their shape.
• Slip a moisture absorber sachet into drawers, wardrobes and any sealed case before you close it up.

Raise Everything Off the Floor

Concrete floors stay cold and hold moisture, and in many parts of South East London the clay soil beneath keeps that floor quietly damp all year round. Anything sitting directly on it will eventually draw that damp upwards.

• Put wooden pallets, plastic pallets or sturdy battens down first and build upwards from there.
• Aim for at least five to ten centimetres of clearance under every item, more if you can manage it.
• Plastic shelving units are ideal for smaller pieces, boxes and anything you want to reach easily.
• Keep furniture a few centimetres away from the walls of the unit as well — air needs to move on all sides.
• Metal feet and castors can rust and stain flooring or fabric, so sit them on offcuts of timber or thick card.

Dismantle, Protect and Label Sensibly

Anything that comes apart should come apart, because smaller pieces stack better and are less likely to twist or warp. Beds, dining tables and larger wardrobes are the usual candidates.

• Bag all screws, bolts and fittings, then tape the bag to the piece it belongs to. Loose fixings in a shoebox are how weekends get ruined.
• Wrap table legs and bed posts individually so they cannot rub against each other in transit.
• Remove glass tops and mirrors, wrap them well and store them upright and on edge — never flat, and never with weight on top.
• Secure wardrobe and chest drawers with low-tack tape so they cannot slide open, or remove them and store them separately if the frame allows.
• Label every item on a visible side with what it is and which room it came from. Future you will be grateful.

Plan the Layout and Keep Air Moving

How you load the unit matters as much as how you packed. Think of it as a room you will need to walk into, not a puzzle you are trying to complete.

• Put the heaviest, sturdiest items at the back and along the sides, with lighter things on top.
• Leave a walkway down the middle so you can reach the far end without climbing over the sofa.
• Leave a gap of fifteen to thirty centimetres between the top of your stack and the ceiling, and do not block any vents.
• Store the things you will need first — seasonal clothes, tools, paperwork — near the door.
• Stack boxes squarely and no more than shoulder height so nothing topples when you open the door.

Check In From Time to Time

A quick visit every few months is well worth the trip. Look for condensation on the inside of the door, damp patches on boxes, a musty smell or any sign of mould on fabric. If you spot a problem, air the unit on a dry day, replace your moisture absorbers and shift anything that is sitting too close to a wall. Mentioning it to the site staff early usually solves it before it becomes expensive. Store well, and your furniture will be ready to go straight back into the new place — no scrubbing, no regrets.