How to close cardboard box bottom

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Throughout moving history people have asked the question, “How should I fold and tape my moving boxes?”. No one wants the added stress of a box that bottoms out so we decided to bring our box to the gym and put it to the test – box boot camp! Find out if the complicated fold does more than the simple fold and how much tape do you actually need to guarantee a secure close?

Moving Box Fold #1: Complicated fold with no tape

First we tested the complicated fold with no tape. We found that it would hold up to 5lbs before opening. This work great if you’re moving a bunch of Kleenex, but other than that – you should probably use tape.

How to close cardboard box bottom

How to close cardboard box bottom

Moving Box Fold #2: Complicated fold with one strip of tape

For our second test we folded the box like number 1 and included one strip of packing tape. We started with 10lbs, then 20lbs, all the way until 140lbs, at which point I couldn’t properly lift the box. Who would have thought one piece of tape could make that much difference!

How to close cardboard box bottom

Moving Box Fold #3: Simple fold with one strip of tape

So how does a simple fold compare to the more complicated fold, with only one strip of tape?

How to close cardboard box bottom

How to close cardboard box bottom

To our surprise there was NO difference between the complicated fold with one strip of tape and the simple fold with one strip of tape. Both methods were tested with 140lbs of weights packed inside them. In other words don’t bother spending time folding the box into itself and take it easy on the tape. Now you know!

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(Image credit: Joe Lingeman)

There’s a reason professional movers are way better at packing up our stuff than we are. Not only do they know to never, ever put 50 boxes worth of stuff into one massive box (if you want to get a hernia, go for it)—but they also, quite frankly, are experts at actually putting those boxes together.

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We asked Darina Murashev, a moving specialist at Move.org, to help.

“One of the most common mistakes that people make while boxing up their belongings is not taping the bottom of the box securely enough for it to hold a certain amount of weight,” Murashev says. “When packing heavy items like kitchen appliances and fine china, it’s important to prepare your moving boxes by taping the bottom of the box well past the bottom folds, up high onto the sides of the box. This makes the box more secure when handling heavy items. Doubling up on tape is an additional way to ensure your box is nice and secure.”

How to Put Together a Moving Box (The Best, Easiest Way)

Here, Murashev offers a step-by-step guide on how to put together a moving box.

1) Put the top flaps of the box down, and open the box.

(Image credit: Joe Lingeman)

2) Flip the box over and fold down all of the edges into the inside of the box. It’s better to first put the smaller edges inside and then the larger edges.

(Image credit: Joe Lingeman)

3) Use your packaging tape and tape down the long, horizontal side of the box. Tape about halfway over the side of the box for extra support.

(Image credit: Joe Lingeman)

Make sure the cardboard flaps are close together. Do the same taping again, for more protection.

(Image credit: Joe Lingeman)

4) Using the ‘H-taping method,’ tape both sides of the shorter vertical sides of the box, for extra support.

(Image credit: Joe Lingeman)

How do you seal the bottom of a cardboard box?

The quickest and easiest way to seal a cardboard box is to use a handheld tape dispenser, which applies the tape tightly to the box and helps reduce tape waste. To provide extra protection and ensure all the flaps of the box are sealed, use the letter “H” seal method used by most moving companies.