Brim, skirt, and raft are all first-layer helpers—but they do completely different things. Use a skirt for priming, a brim for adhesion, and a raft only when you really need it.
If you’re guessing which one to use, you’re leaving print quality (and success rate) on the table.
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What Each One Actually Does
Skirt → Priming Only
- printed around the object (not touching)
- helps get filament flowing cleanly
- checks bed leveling visually
👉 Does NOT improve adhesion
Brim → Adhesion Boost
- attached to the base of your print
- increases surface area
- prevents lifting and warping
👉 Best all-around adhesion tool (other than a PEI bed)
Raft → Extreme Adhesion Layer
- thick base layer under your print
- isolates print from bed issues
- easy removal (sometimes)
👉 Last resort option
When to Use Each (Simple Rules)
Use a Skirt if:
- your printer is already dialed in
- you just want clean extrusion
- small/simple prints
Use a Brim if:
- corners are lifting
- prints are failing mid-way
- large flat parts
👉 This solves most adhesion problems.
Use a Raft if:
- bed is uneven
- adhesion keeps failing
- printing difficult materials
👉 But expect worse bottom surface quality.
Key Differences (Quick Table)
| Feature | Skirt | Brim | Raft |
|---|---|---|---|
| Touches print | ❌ No | ✅ Yes | ✅ Yes |
| Improves adhesion | ❌ No | ✅ Yes | ✅ Strongly |
| Material use | Low | Medium | High |
| Bottom finish | Perfect | Good | Rough |
| Use case | Priming | Most prints | Problem prints |
Real-World Recommendation
If you’re unsure:
👉 Start with a brim
It gives you:
- better adhesion
- minimal downside
- consistent results
Common Mistakes
- Using a skirt expecting adhesion
- Using a raft unnecessarily
- Not adjusting brim width (too small)
- Ignoring Z offset and relying on rafts
👉 These waste time and material.
Pro Tips (This Is What Actually Works)
- Brim width: 5–10 mm
- Disable raft unless needed
- Use skirt for quick diagnostics
👉 Most pros rarely use rafts.
Related Fixes You Should Check
These settings work together with:
👉 If those aren’t fixed, these won’t save you.
Conclusion
Brim vs skirt vs raft isn’t complicated once you understand the roles:
- Skirt = prep
- Brim = fix
- Raft = backup
Use the simplest option that works—and your prints will come out cleaner, faster, and more reliable.