Better 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.