Strength

Do more walls or more infill make parts stronger?

Q: Do more walls or more infill make parts stronger?

Add walls before you raise infill for most functional parts, and treat 3–5 walls with 15–40% infill as the community summary rather than a catalog setting.

First in this ranking: Prusament PETG.

Nozzle240–260 °C (464–500 °F)
Bed70–90 °C (158–194 °F)
Speedup to 200 mm/s
Dry—
Density1.27 g/cm³

Ranked filaments

Rank	Filament	Material	Nozzle	Bed	Price / kg	Datasheet	Buy
1	Prusament PETGA functional PETG row from the strength guide. Nozzle 240–260 °C (464–500 °F) and bed 70–90 °C (158–194 °F) on the Prusament PETG technical data sheet. The row does not store a wall count or an infill percent.	PETG	240–260 °C (464–500 °F)	70–90 °C (158–194 °F)	—	Datasheet	Search Amazon
2	Polymaker PolyMax PLAPolyMax PLA technical data sheet. Nozzle 190–230 °C (374–446 °F) and bed 25–60 °C (77–140 °F). A drying temperature of 55 °C (131 °F) is stored and the hours are not. No wall or infill cell.	PLA	190–230 °C (374–446 °F)	25–60 °C (77–140 °F)	—	Datasheet	Search Amazon
3	eSUN 3D PLA+eSUN PLA+ from the Open Filament Database. Nozzle 190–230 °C (374–446 °F) and bed 50–70 °C (122–158 °F). Drying is not stored. PLA+ in the name is not a wall-count measurement.	PLA+	190–230 °C (374–446 °F)	50–70 °C (122–158 °F)	—	—	Check price at Amazon
4	Bambu Lab PLA BasicPlain PLA as the contrast, not a stronger recipe. Nozzle 190–230 °C (374–446 °F), bed 35–45 °C (95–113 °F), and drying at 50 °C (122 °F) for 8 h. The sheet does not list walls or infill.	PLA	190–230 °C (374–446 °F)	35–45 °C (95–113 °F)	—	Datasheet	Search Amazon

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For a part that has to take a load, add walls before you fill the middle. The 3–5 wall and 15–40% infill band is the community summary. It is not stored on any filament row. Strength is which material to load. This page is the slicer choice after that.

What the catalog stores

Prusament PETG lists 240–260 °C (464–500 °F) and 70–90 °C (158–194 °F). PolyMax PLA lists 190–230 °C (374–446 °F) and 25–60 °C (77–140 °F), with a drying temperature of 55 °C (131 °F) and no hours. eSUN PLA+ lists 190–230 °C (374–446 °F) and 50–70 °C (122–158 °F), and drying is not stored. Bambu PLA Basic lists 190–230 °C (374–446 °F), 35–45 °C (95–113 °F), and drying at 50 °C (122 °F) for 8 h. None of those records has a wall count. PLA, PETG, and PLA+ are the material hubs.

User settings in the bank

One variant describes a wood PLA birdhouse at 3 walls and 30% gyroid and asks whether wood pulp helped it last outdoors. The supplied top comments on r/3Dprinting 1w14zsq are about sparrows in that birdhouse and about PLA in the sun, including a boomerang left on a dashboard. The outdoor question is Can PLA be used outdoors?. The 3-wall line is not a strength test in the comments we have.

A variant names PLA+ at 205 °C (401 °F) and a 60 °C (140 °F) bed, 2 walls, and 100% infill. That nozzle sits inside the eSUN PLA+ range of 190–230 °C (374–446 °F). The 60 °C (140 °F) bed sits inside the 50–70 °C (122–158 °F) bed. Two walls and 100% infill are still that user's choices. A variant names a PETG print at 230 °C (446 °F), an 80 °C (176 °F) bed, and 15% gyroid. Prusament PETG's nozzle starts at 240 °C (464 °F), so 230 °C (446 °F) is not that row.

Comments that answer a different failure

A comment on r/FixMyPrint x5ly22 says the failure is bad bed adhesion. Another says 100% infill wastes a lot of filament. Bed adhesion is the first of those. The second agrees with spending plastic on walls rather than a solid interior, and it is one comment, not a measured strength curve.

r/FixMyPrint 1eqtpsj, r/FixMyPrint 12xa9z5, and r/prusa3d 1kg80ll are in the bank. The supplied excerpts do not include a wall or infill number from those threads.

Pros and cons

Pros

The strength order in the first sentence matches the editorial summary: walls before infill.
Every temperature in the table is a filament row. None of them pretend to be a slicer preset.

Cons

The catalog has no wall field and no infill field. Publishing 3–5 and 15–40% in the table would invent columns.
The supplied top comments are mostly off this question. One says the failure is bed adhesion. One complains that 100% infill wastes filament. The birdhouse thread's top comments are about birds and about PLA in the sun.

Printer considerations

A bank variant describes a wood PLA birdhouse at 3 walls and 30% gyroid. That is the variant text, not a top-comment test, and not a catalog default.
Another variant names PLA+ at 205 °C (401 °F) and a 60 °C (140 °F) bed, with 2 walls and 100% infill. Those are that person's settings. They are not the eSUN PLA+ row, which lists 190–230 °C (374–446 °F) and 50–70 °C (122–158 °F).
A third variant names PETG at 230 °C (446 °F), an 80 °C (176 °F) bed, and 15% gyroid. Prusament PETG lists 240–260 °C (464–500 °F) and 70–90 °C (158–194 °F). The variant is not that row.

Printer limits

What the community says

The editorial summary says more walls add more strength than more infill for most functional parts, and that 3–5 walls with 15–40% infill is typical. This catalog does not store either number. A comment on r/FixMyPrint x5ly22 says the pictured failure is bad bed adhesion, and another says 100% infill wastes a lot of filament. A comment on r/3Dprinting 1w14zsq is about PLA left in the sun, including a dashboard boomerang, which belongs on the PLA outdoor page. The 3-wall, 30% gyroid line is a variant phrasing about a wood PLA birdhouse, not a measured strength result in the supplied comments.

Sources & notes

Accessed 16 October 2026.

Prusament PETG technical data sheet datasheet
PolyMax PLA technical data sheet datasheet
Bambu PLA Basic technical data sheet V3.0 datasheet
Open Filament Database, eSUN 3D PLA+ other
Community source, r/3Dprinting 1w14zsq reddit
Community source, r/FixMyPrint x5ly22 reddit
Community source, r/FixMyPrint 1eqtpsj reddit
Community source, r/FixMyPrint 12xa9z5 reddit
Community source, r/prusa3d 1kg80ll reddit

Answer JSON · Markdown

Questions

Does the catalog recommend 3–5 walls and 15–40% infill?

No. That band is the editorial summary. Prusament PETG, PolyMax PLA, eSUN PLA+, and Bambu PLA Basic do not store a wall count or an infill percent. Their nozzle and bed cells are print temperatures.

Is 100% infill the strength setting?

The summary says walls do more for most functional parts. A comment on r/FixMyPrint x5ly22 treats 100% infill as a lot of wasted filament. A bank variant that used 2 walls and 100% infill is that user's print, not a FilamentFacts preset.