ModsJava
BetterSlabPlacement
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
Allows placing full blocks on top of bottom slabs, greatly improves building flexibility. Requires Fabric API.
⬇ Download on ModrinthBetter Slab Placement
This client-only fabric mod solves a common building limitation in vanilla Minecraft: you can now place full solid blocks directly on top of bottom slabs.
Key Features
- Only runs on client side, no mod installation required for multiplayer servers, fully compatible with vanilla servers
- No extra configuration needed, works immediately after loading the game
- Does not alter world data, block physics or other game mechanics, only adjusts block placement collision check
- Perfect for detailed architecture, interior decoration and complex terrain construction
Requirements
- Minecraft version: 1.21.1
- Loader: Fabric
- Mandatory dependency: Fabric API
Usage
Install the mod together with Fabric API, then you can place blocks above lower slabs normally while building.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.11
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
File checked by MCModsHub
- Ships as async-locator-1.0.0.jar — drop this file into the mods folder
- Download size: 15 KB
- Download link checked 8 Nov 2026 — working
These come from our own check of the pack file, not from the source page.