Poor first-layer adhesion: why a part comes off the plate
Poor first-layer adhesion is when the first layer of plastic does not stick well enough to the build plate, so the part comes loose or shifts during printing, or only a clump of plastic forms.
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Why the first layer matters
The whole part stands on its first layer. If it does not stick, the nozzle pushes it sideways on later passes and the part shifts or falls off. The joining of two surfaces is classic adhesion, which depends on temperature, cleanliness and pressure, see also the first layer.
Plastic sticks best when it is hot and the nozzle presses it gently onto a clean plate.
The most common causes
- A dirty or greasy plate, see PEI plate.
- A wrong nozzle distance, see Z-offset and bed leveling.
- A low bed temperature, see bed temperature.
- A draught, or the fan switched on too early.
- Damp or old filament.
The first layer is printed more slowly than the others so that it has time to stick. On a large area this shows in the print time and so in the price.
What you can do in the model
- Give the part the largest possible area on the plate, see model orientation.
- Rounded bottom edges instead of sharp corners reduce warping.
- Avoid a part that stands on a point or a very small area. With slender parts a brim or a raft helps.
For your order
Our server prepares the print and supports are included in the price, and we photograph the batch before dispatch. What we do not handle for you is the shape of the model. If you have a part with a small contact area, send us a note or adapt it.
Common questions
Is the first layer more important than the others?
Yes, because the whole print depends on it. That is why it gets the most attention.
Does glue on the plate help?
With some materials yes. With PLA and PETG on a clean plate it is usually unnecessary.
Why did my part come loose halfway through printing?
Usually warping tore it off, or the nozzle collided with a raised edge.
Related terms
First layer
The first layer is the first layer of plastic that the nozzle lays on the build plate. If it does not stick, the whole print fails.
Warping
Warping is a deformation of a print where corners and edges lift off the plate or the whole part bends, because plastic contracts as it cools.
Brim
A brim is a thin flat edge of one or more layers around the base of a part, which increases the contact area with the bed and stops the part coming loose.
Raft
A raft is an underlay layer of plastic printed under the part, on which the model is printed instead of directly on the bed. It enlarges the contact area and evens out the base.
Bed temperature
Bed temperature is the temperature of the heated build plate on which the first layer is printed. The right value prevents peeling and lifting corners, while too high a value spoils the underside of the part.
Z-offset
Z-offset is a setting that moves the print nozzle higher or lower above the build plate by fractions of a millimetre. It decides how firmly the first layer is pressed onto the plate.
SourcesSources checked 1 November 2026, 2
- Adhesion, Wikipedia, checked 2026-11-01
- Fused filament fabrication, Wikipedia, checked 2026-11-01
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Upload a model and see the price per piece, the total with shipping and the date at once. We print in Košice, Slovakia, from PLA and PETG.
No model? No problem, pick a ready one
These sites have thousands of free models. Download an STL or 3MF and upload it here. If you sell it or use it for business, check the model licence. How to pick a model and licence