Slabbed

FINALLY! Put stuff on slabs!

Hang lanterns from slabs! Stack blocks on slabs! Stack blocks on those blocks on those slabs!
Your slabs finally get the love they deserve 💖

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What Slabbed does

In vanilla Minecraft, slabs are weirdly stubborn little half-blocks. They look like they should support things, connect to things, and behave like real building surfaces, but the game often treats them like awkward not-quite-blocks instead.

Slabbed changes that. Supported blocks and objects sit at slab height instead of floating, refusing to place, or pretending the slab is not there.

	In vanilla Minecraft	✨ With Slabbed ✨
🧱	Many blocks want a full block underneath them. Slabs do not always count. Rude.	More blocks use slabs as support and sit where the slab surface actually is.
🏮	Hanging or standing objects float, refuse to attach, or land at full-block height.	Torches, lanterns, signs, fences, walls, panes, chests, hoppers, crafting tables, furnaces and friends line up with slab height.
🧩	Building upward from slabs is floaty and sad.	Blocks and objects stack naturally on slab-supported structures, and keep going down past one block deep.
👀	What you see and what Minecraft thinks is there can disagree.	The visible block, its outline, and what your crosshair actually hits all stay in the same place.
💖	Slabs are useful, but the game makes them fussy.	Slabs become friendlier building surfaces. Still slabs. Just less derpy.

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🔒 New: your blocks stay where you put them

This is the big one, and it is worth its own section.

Older Slabbed builds worked out a block's height while you looked at it. Mostly fine! Except when it wasn't: break something nearby, place something next to it, let a chunk reload, and a block you placed ages ago could quietly decide to sit somewhere else. Nobody asked it to. It just did.

Now the height is decided once, at the moment you place the block, and then it is locked. Neighbors can come and go. Chunks can reload. The block does not care. It stays exactly where you put it.

⚠️ One catch, and it's a real one. That locked-in height only exists for blocks placed by the new builds. If you open an older world, things you already lowered won't have that record, and they'll sit at normal height instead. Nothing is deleted or corrupted — but back up any world you care about before opening it in a new build, and try a copy first. Automatic conversion for old worlds is on my list.

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Countered's Terrain Slabs compatibility

With Countered's Terrain Slabs installed, terrain slabs become proper Slabbed support instead of just decoration. Slabbed works fine without it, but if you build with them, this is the good stuff:

🪶	Flush, not floaty	Torches, lanterns, fences, walls, panes, signs, chests, hoppers, furnaces, crafting tables and selected decorative cubes sit on Terrain Slabs surfaces like they do on vanilla slabs.
🌿	Vegetation behaves	Short grass, ferns and tall grass sit on Terrain Slabs terrain toooooo. Immerse yourself in slabby foliage!
🧩	Combined slabs	Vanilla slabs placed on Terrain Slabs surfaces combine into a lowered surface, and supported objects follow that height.
🔌	Optional	No Terrain Slabs? No problem.

Note: Full combining between Terrain Slabs, vanilla slabs and regular building blocks is still a work in progress. Deep mixed arrangements may not merge, stack, collide or target perfectly yet. If you're stacking three slab systems in one spot and something looks a bit odd, that's probably still expected.

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🌍 A development journal for Slabbed

Curious about the bigger idea behind the project? Read the Slabbed Field Guide for a look behind the scenes at real-time development. Updated by Codex, designed and overseen by me (totally human, promise!).

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Still rough

Slabbed is still pre-release, and some things are a little spicy:

	Rough edge	Current state
⚡	Redstone dust on lowered steps	Signal travels up a lowered step but not always back down. Looks like a vanilla quirk that lowered blocks make more visible — being diagnosed before anything gets "fixed" and made worse.
🚪	A few block families	Doors, carpets, banners and beds can still land at grid height in deep arrangements. Working through them one at a time.
⛓️	Very deep chains and dripstone	The deepest hanging cases are still being verified.
🎨	Heavily custom modded blocks	Mods that do unusual things with shapes, rendering, collision, placement or models may need dedicated compatibility work.

If something looks wrong, it probably is, and it's probably worth reporting. Just check whether it's already been reported first, pleeease.

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Compatibility

• Minecraft: 26.x, 1.21.11, and 1.21.1
• Mod loader: Fabric (+ Fabric API). NeoForge builds are available for 1.21.1.
• Multiplayer: install on both client and server so visuals, outlines and targeting agree.
• Terrain Slabs: supported, optional, and highly recommended. Works with both the modern terrain_slabs mod id and the legacy terrainslabs id.

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🐛 Reporting bugs

Bug reports are super duper helpful! The most useful ones include:

• Minecraft, Slabbed, Fabric Loader and Fabric API versions
• Your other mods, especially Terrain Slabs
• Exact placement steps
• What you expected vs. what actually happened
• A short screenshot or video — especially for crosshair, placement, outline or visual-height mismatches
• For lag reports: the same scene with Slabbed on and off. "Slow with it on and off" vs "slow only with it on" is worth ten times a plain "it lags"

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➼ What's next

• Automatic height conversion for worlds built on older versions
• Redstone dust, properly diagnosed
• The remaining block families — doors, carpets, banners, beds
• More Terrain Slabs polish and deeper combined-slab support
• Compatibility work for weird modded blocks that need it
• Less floating. Less fussing. More slab.

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Slabbed's goal is simple:

Things should sit where they look like they sit.

Minecraft makes that surprisingly complicated.

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💖 Thanks! + AI Disclaimer

👾 Slabbed contains AI-generated code (I am still learning to code with Java!), but the project is designed, directed, planned, maintained, and tested by me. I use AI to help me realize my dream, not to churn out slop. If you see any wonky code that could use improvement, please feel free to open a pull request! :) I am working hard at maintaining the project and keeping up with bugs!

Slabbed is made by one person and is still actively evolving. Every bug report, screenshot, video and weird edge case helps make slab-supported building better. Thank you for playing with Slabbed and helping me make it what it is!

:3 Peetsa

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💙 Slabbed on Modrinth

Are you a slab fan??? Throw Slabbed a ❤️ on Modrinth! 🧱✨

Highly recommended: Countered's Terrain Slabs