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My cushion has a hump or uneven corners after unpacking. How do I flatten it?
Also asked as:It was bent in half before being vacuum sealed.There's a big hump in the middle.
Folded foam remembers the fold for a while, the way a sail remembers the bag. Most of the fix is your own weight and a little patience.
SaveThe quick answer
A cushion with a hump after unpacking was usually folded before vacuum sealing, and it flattens as the filling recovers: sit on it, tug it back into shape, and work the filling, even beating it lightly, so it settles evenly. Corners sitting lower than the middle in the first days are normal for handmade vacuum-packed pieces, and a lasting hump is rare.
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What you see, why, and what to do
| What you see | Why | What to do |
|---|---|---|
| A hump across the middle | The cushion was folded before vacuum sealing | Sit on it, tug it square, work the filling |
| Corners lower than the center | The filling is still recovering | Work the filling toward the corners and give it the first days |
| Thin and flat on day one | Compression; it needs 36 to 48 hours | Open it promptly, then wait before measuring |
| Two pieces at slightly different heights | Normal handmade variation | Tell the workshop what you need to match |
| A hump that won't settle | Rare | Photograph it and write to the workshop |
Measure thickness only after full expansion, never on the afternoon the box arrives.
Key facts
- A cushion folded before vacuum sealing can come out with a hump.
- Vacuum-packed cushions need time to recover; corners may sit lower at first.
- Slight unevenness is normal for handmade pieces.
- Sit on the cushion, tug it into shape and work or lightly beat the filling.
- Allow about 36 to 48 hours for a vacuum-packed cushion to expand.
- A lasting hump is rare.
- When one didn't recover, the workshop offered a partial refund or a discounted replacement.
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The flattening routine
Open the bag without blades
The cushion sits right against the plastic. Snip the edge away from the fabric and tear the bag by hand.
Sit on the hump
Your weight does what a rolling pin does to dough. Stay a while.
Tug it square
Pull the edges and corners back out to the shape of the cover.
Work the filling
Knead it, even beat it lightly, so it settles evenly from the center to the corners.
Give it 36 to 48 hours
Then look again, and measure if you need to.
The floor cushion that arrived folded in half
A buyer in the US opened a vacuum pack and found the cushion had been folded before sealing, with a hump down the middle to prove it. The maker's advice was the routine above: sit, tug, work the filling. The workshop said a lasting hump rarely happens, and when this one didn't recover, it offered a partial refund or a replacement at a large discount. Another buyer's floor mattresses sat lower at the corners two days in; that buyer needed matching heights and was offered a discount on a follow-up order instead of a return.
Weather it out before you judge
Foam coming out of a vacuum pack is like a boat after a storm, friend: it needs a calm day before you check the rigging. The first 72 hours Pattern and foam recovery explain what the filling is doing, and the floor cushions hub shows how a settled one should sit. How many hours has yours had?
Vacuum-packed foam needs 36 to 48 hours to expand, so measure a new cushion's height after that, not the afternoon the box arrives.
Callum
Buyer questions
- A common question
My cushion came vacuum packed and folded, and now it has a hump. How do I fix it?
The workshop's answerSit on the cushion and tug it back into shape, then work the filling, even beating it lightly, so it settles. This rarely happens; when one didn't recover, the workshop offered a partial refund or a replacement at a large discount.
- A common question
Two days after opening, my floor mattresses sit lower at the corners than in the middle. Is that normal?
The workshop's answerVacuum-packed cushions need time to recover, and slight unevenness is normal for handmade pieces. When that buyer needed matching heights, the workshop offered a discount on a follow-up order rather than a return.
- A common question
How do I open a vacuum-packed cushion without cutting the fabric?
The workshop's answerThe cushion sits right against the plastic, so skip knives and long scissors. Snip the edge away from the cushion and tear the bag by hand. The foam starts expanding at once and reaches full shape in about 24 to 48 hours.
- A common question
Can I vacuum-pack the cushion again to send it back?
The workshop's answerUse a large vacuum storage bag and a household vacuum, or have a pack-and-ship store compress and box it. It won't match machine compression, so measure after full expansion before deciding to return.
Questions buyers ask next
How long until a vacuum-packed cushion reaches full size?
Allow about 36 to 48 hours after opening; the foam starts expanding the moment the bag is cut. Open the parcel promptly rather than leaving it sealed, and measure thickness only once it has fully risen.
Will a compressed sofa fit through a narrow door?
Yes. Sofas arrive as vacuum-compressed rolls of about 12 x 12 x 45 to 50 in (30 x 30 x 110 to 120 cm), usually two or three plus a small bar box, so a 26 in (65 cm) doorway, narrow stairs and a regular car are all fine.
What if the hump is still there after two days?
Keep working it: sit, tug and knead the filling for a few more days, since corners and folds can lag. If it truly won't settle, photograph it and write to the workshop; a lasting hump is rare and has been put right.
