Quick summary: To tape a moving box, close the bottom flaps so they meet in the middle (don’t fold them under each other), run a strip of packing tape along the centre seam, then a strip across each end seam so the tape makes an H. That’s the H-tape method. Use proper 48mm packing tape, not masking tape, sellotape or duct tape, and add a second strip along the centre on any box carrying books, tins or crockery. The top usually only needs one strip along the middle. If you’re booking a man and van in Bristol, sealed, square boxes are also the quickest thing for a driver to load.
Almost every box that fails during a move fails at the base, not the top. The weight of what’s inside pushes down on a seal that wasn’t built to hold it, the flaps separate, and everything drops out, usually on the driveway or halfway down the stairs. That’s a taping problem, not a box problem. A standard single-wall box carries a decent load when the base is sealed properly, and not much at all when it isn’t.
Taping a box well takes seconds and uses less tape than most people think. This guide covers the H-tape method step by step, which tape to buy, when to double up, and how to check a box before it goes in the van.
How to tape a moving box: the H-tape method
The H-tape method is the standard way to seal the bottom of a box. The name comes from the shape the tape makes on the base: one long strip down the middle, and a strip across each end, like the letter H. It gives you the most strength for the least tape.
- Close the bottom flaps. Fold the two short flaps in first, then the two long flaps over them, so the long flaps meet neatly in the middle. Don’t tuck them under each other.
- Tape the centre seam. Run one strip along the line where the two long flaps meet, and carry it a few centimetres up each side of the box so the ends have something to grip.
- Tape one end seam. Run a strip across the edge where the flaps meet the side of the box, again carrying it up the sides.
- Tape the other end seam. Do the same at the opposite end. That’s your H.
- Press it down. Rub along each strip with your hand so the tape bonds to the cardboard properly. Tape that’s only lightly stuck lifts once the box is carried.
The centre strip takes most of the weight. The two end strips stop the flaps peeling back at the corners, which is where a heavy box usually starts to go.
For a very heavy box, you can go a step further and add a second strip down the centre, or a strip across the middle of the base at right angles to the first. Anything beyond that mostly just uses up tape.
What tape is best for moving boxes?
Use packing tape. It’s the only kind that’s made for the job, and using the wrong tape is one of the most common reasons boxes fail.
- Packing tape (polypropylene or vinyl). Strong, wide (48mm is the standard width) and made to stick to cardboard. A roll goes a long way.
- Masking tape. Not strong enough for sealing boxes. It’s designed to peel off cleanly, so it lets go under weight. Fine for labels, not for the base of a box.
- Duct tape. It will hold, but it costs more than packing tape, it’s awkward to tear straight, and on cardboard it doesn’t do anything packing tape doesn’t. Keep it for repairs.
- Sellotape and electrical tape. Too narrow and too weak to hold a box closed.
Buy a few rolls at the start rather than one. Running out halfway through packing is how the last boxes end up rushed and under-taped. If you’d rather not do the packing yourself at all, a professional packing service brings its own materials.
Don’t interlock the flaps
You’ll see this a lot with supermarket boxes. The four bottom flaps get folded so each one tucks under the next, in a sort of pinwheel. The base holds together without tape, which feels clever. It isn’t. The folds put pressure on the centre of the base, and a few kilos of contents plus the movement of a van is enough to pop them apart.
Close the flaps so they meet in the middle and tape them. It takes the same amount of time, and it actually holds.
How to tape the bottom of a box for heavy items
For heavier boxes, add a second strip of tape straight over the centre seam, and a second layer on the end seams if the box feels soft. Double up when:
- Books, tools, tins, crockery or anything dense is going in. If it feels heavy as you pack it, it needs it.
- The box is single-wall cardboard, like many supermarket boxes. Double-wall boxes are stiffer to start with.
- The box has been used before. Cardboard loses strength every time it’s folded, loaded and stacked.
Heavy things also belong in smaller boxes. A big box full of books is hard to lift safely and much more likely to split, however well it’s taped. HSE’s guide to manual handling gives guideline weights for lifting and is clear that they aren’t safe limits, so keep boxes to a weight you can carry comfortably.
Sealing the top
The top of a box doesn’t carry the load, so it doesn’t need the same treatment as the base. One strip along the centre seam is enough for most boxes, because the box stacked on top holds the flaps down.
The exception is anything that could spill or leak if the box tips, like bottles or cleaning products. Tape those tops with the full H as well, and keep them upright. For glasses and plates, our guide to packing plates, glasses and fragile items covers what goes inside the box.
How to check a sealed box
Two quick checks before you move on to the next one:
- Lift it by the sides. If the base sags noticeably, it’s too heavy for that box, so move some of the contents into another one. A box you can lift comfortably also gets carried more carefully, and HSE’s good handling technique guidance explains why keeping loads manageable matters.
- Tilt it gently each way. If anything shifts or rattles, fill the gaps with paper or clothes. Anything that rattles in your hands takes a beating in the van.
For fragile items, squeeze the sides too. A box that gives easily is under-filled, and once other boxes are stacked on top it will crush and damage what’s inside.
When to double-box
Double-boxing means one box inside another, with padding between the two. For most things it’s overkill, but it’s worth doing for:
- Glassware, ornaments and framed pictures you really don’t want broken.
- Electronics that came double-packed from the manufacturer. If they packed it that way, there was a reason.
- Liquids: seal the bottle in a plastic bag, put it in a small box, then put that inside a bigger one.
For everything else, a well-packed single box with a taped base is plenty.
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How much tape you’ll need
It depends on how many boxes you have and how many you double-tape, and roll lengths vary, so check the length on the pack. The more common mistake is buying too little rather than too much. It’s better to have a spare roll left over than to finish the last few boxes in a hurry.
For a bigger move, a tape gun is worth it. It’s a handheld dispenser that cuts the tape as you go, and it’s much quicker than tearing tape by hand. For a handful of boxes you can manage without one. Our guide to packing for a move covers the rest of the kit.
After the move
Once you’ve unpacked, flatten the boxes. Good ones can be kept for next time or passed on, and the rest can go out for recycling. Some councils ask you to peel off the parcel tape first, so check your council’s guidance. GOV.UK’s household waste service finder shows what your council collects and where your nearest recycling centre is. If you’re moving a whole home and want the loading done for you, see our house and flat moving service.
Frequently asked questions
What is the H-tape method?
It’s a way of sealing the bottom of a box with three strips of tape: one along the centre seam and one across each end seam, making an H shape. It stops the flaps separating in the middle and peeling back at the corners.
Can you use duct tape for moving boxes?
You can, and it will hold, but it isn’t better than packing tape on cardboard and it costs more. Packing tape is made for the job, so use that for sealing and keep duct tape for repairs.
Is masking tape strong enough for moving boxes?
No. Masking tape is designed to peel off easily, so it won’t hold the base of a loaded box. Use it for labelling instead.
Should you tape the top of a moving box?
Yes, with one strip along the centre seam for most boxes. Use the full H on boxes with anything that could spill, and on boxes that will be carried a long way or stacked high.
Do you need to remove tape before recycling cardboard?
Some councils ask you to remove parcel tape and flatten boxes before putting cardboard out. Check your own council’s recycling page, which you can find through GOV.UK.
How do you tape a box so the bottom doesn’t fall out?
Close the flaps flat so they meet in the middle, use the H-tape method with proper packing tape, press the tape down firmly, and add a second strip along the centre for heavy contents. Keep heavy items in smaller boxes.
