ModsFinder

26.3 Slab and Stair Backport

by Tectre

26.3 Slab and Stair Backport adds stairs and slabs to Minecraft 1.21.1 on Fabric, bringing back block shapes for that version.

FabricClient and serverAll rights reserved1.21.1

What it does

Stair and slab blocks are added to the 1.21.1 game, so builders on that version can place block shapes that are otherwise not available there. The mod is a Fabric mod and is published only for 1.21.1, with the latest file, 1.1, dated 2026-08-06. Servers that run it need every player to install it too. The code is not open source and is covered by All rights reserved.

Key features

  1. Backported stairs

    Stair blocks are added to 1.21.1 so they can be placed in builds on that version.

  2. Backported slabs

    Slab blocks are added alongside the stairs, for matching flat and half-height edges.

  3. Wool and concrete variants

    The mod's blocks are added for wool and concrete, letting builders mix the new pieces with existing color palettes.

Compatibility

Latest build for each game version and loader.

1.21.11.1
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

How it compares

Full comparison

Wool Stairs and Slabs Early is a Fabric mod for 1.21.8 – 26.1.2 under All rights reserved, so it targets newer builds than this one. Vanilla+ Verticals also runs on Fabric for 1.21.1 – 1.21.10 but is released under the Creative Commons Attribution Non Commercial 4.0 license. More Block Variations (Vertical Slabs) is open source under the MIT License and targets 1.21.3 only.

ModLoadersGame versionsEnvironmentUpdated
26.3 Slab and Stair BackportFabric1.21.1Client and server2026-08-06
Wool Stairs and Slabs EarlyFabric1.21.8 – 26.1.2Client and server2026-06-04
Vanilla+ VerticalsFabric1.21.1 – 1.21.10Client and server2025-10-20
More Block Variations (Vertical Slabs)Fabric1.21.3Client and server2024-11-16

Questions

Does 26.3 Slab and Stair Backport need to be installed on the server?

Yes. Installation covers the server and each player's game.

In the catalog

26.3 Slab and Stair Backport is one of 12,078 Decoration mods on ModsFinder, and one of 6,982 Decoration mods for Fabric. 32,366 mods support Minecraft 1.21.1.

Similar mods

What the author says

A quick mod I popped together for my Fabric Cobblemon server, as there were no 1.21.1 Fabric backports for wool or concrete stairs and slabs.
Tectre, on the Modrinth page

Official listing

Owner
Tectre
Published
2026-08-03
Updated on Modrinth
2026-08-06
Facts verified
2026-10-15

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