Step 1: Place it over the middle
Lay the Bedbinder flat over the spot where your two mattresses meet. Center it so it covers both mattress edges equally. The wide fabric panel sits on top of the gap.

It takes less than a minute and zero tools. Here is exactly how to set up the Bedbinder Deluxe and start sleeping on one smooth surface tonight.
A bed bridge connects two separate mattresses into one sleeping surface. But not all bed bridges install the same way.
A foam wedge (vertical bed bridge) just sits in the gap. It creates a bump and does not stop the mattresses from sliding apart. The Bedbinder Deluxe is a horizontal bed bridge. It wraps around both mattresses and physically connects them. No bump. No sliding. No gap.
Here is how to install it in three simple steps.
That is all. No tools. No tape. No screws. No extra hardware.
Lay the Bedbinder flat over the spot where your two mattresses meet. Center it so it covers both mattress edges equally. The wide fabric panel sits on top of the gap.
Pull the straps under both mattresses so they wrap around firmly from underneath. The straps go all the way around and come back up on the other side.
Click the buckles together underneath the mattresses. Tighten the straps until both mattresses are pulled firmly together. Put the fitted sheet on top. Done. You now have one smooth bed.
The Bedbinder works by pulling the mattresses together. The tighter the straps, the better the connection. You want both mattresses pressed firmly against each other with no space between them.
A fitted sheet that is too small will pop off during the night. Measure both mattresses together and pick a sheet that matches. For two 90x200 mattresses, you need a 180x200 sheet. For two 80x200 mattresses, you need a 160x200 sheet.
The Bedbinder holds the mattresses together, but the bed frames should be close too. Push them against a wall or use furniture pads under the legs to stop them from sliding on hard floors.
The Bedbinder stays in place for months. But it is a good habit to lift the sheet once a month and check that the straps are still tight. If they have loosened, just retighten the buckles. This takes about 10 seconds.
Many couples have two mattresses that are not exactly the same height. This is completely normal and the Bedbinder handles it well.
For height differences up to 3 cm, the Bedbinder connects the mattresses without any issues. The fitted sheet smooths out the transition. You will barely notice the difference when lying down.
The Bedbinder Deluxe works on all standard single mattress sizes from 80x200 to 120x200 cm. It is compatible with foam, spring, latex, and hybrid mattresses. It also works on adjustable beds, boxsprings, and split king beds.
A foam wedge sits in the gap and fills it. But it creates a bump you can feel every time you roll over. And it does nothing to stop the mattresses from sliding apart. After a few weeks, the foam compresses and the gap comes back.
The Bedbinder works underneath. It physically connects both mattresses so the gap cannot form. No bump. No sliding. Read our full Bedbinder vs foam wedge comparison.
Install the Bedbinder Deluxe in under a minute. Sleep better tonight.
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Order the Bedbinder DeluxeLearn more: what is a bed bridge | how to fix the mattress gap | Bedbinder vs foam wedge