CurseForge · Minecraft mod
Cannot Build over Lava Source blocks
Cannot Build over Lava Source blocks like Terraria [FORGE]
Quick answer
Which Cannot Build over Lava Source blocks release should I use?
Cannot Build over Lava Source blocks nolavabuild 26.1.2-1.0.3 targets 26.1.2 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is Cannot Build over Lava Source blocks required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Cannot Build over Lava Source blocks nolavabuild 26.1.2-1.0.3 need?
nolavabuild 26.1.2-1.0.3. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Cannot Build over Lava Source blocks without breaking your instance.
Built for Cannot Build over Lava Source blocks nolavabuild 26.1.2-1.0.3. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use nolavabuild 26.1.2-1.0.3. It targets 26.1.2 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside nolavabuild 26.1.2-1.0.3. It opens that exact file at the source.
About this project
What does Cannot Build over Lava Source blocks add?
This blocks the player from placing a block over top of lava sources.
For realism and added difficulty.
Shown in the GIF below, player can build over flowing lava but not over source lava, source is treated as solid-ish and player cannot put a block onto it.
You can only remove source lava with a bucket (or modded machines)

Project description from CurseForge.
Pick your setup
Cannot Build over Lava Source blocks by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
1 loader build1.20.1
2 loader builds1.19.4
1 loader build1.19.2
1 loader build1.19.1
1 loader build1.19
1 loader build1.18.2
1 loader build1.18.1
1 loader build1.18
1 loader build1.17.1
1 loader build1.16.5
1 loader buildShowing the newest 12 of 20 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Cannot Build over Lava Source blocks versions and loaders
nolavabuild 26.1.2-1.0.3
nolavabuild-26.1.2-1.0.3.jar
26 Aug 2026
nolavabuild 1.21.1-1.0.3
nolavabuild-1.21.1-1.0.3.jar
26 May 2026
nolavabuild-1.20.1-1.0.2.jar
4 Jul 2023
nolavabuild-1.19.4-1.0.2.jar
2 May 2023
nolavabuild-1.19-1.0.2.jar
3 Aug 2022
nolavabuild-1.19-1.0.1.jar
25 Jun 2022
nolavabuild-1.18-1.0.1.jar
1 Dec 2021
nolavabuild-1.17.1-1.0.1.jar
26 Jul 2021
nolavabuild-1.16.3-1.0.1.jar
4 Oct 2020
nolavabuild-1.16.2-1.0.1.jar
19 Aug 2020
nolavabuild-1.16.1-1.0.1.jar
23 Jul 2020
nolavabuild-1.15.2-1.0.1.jar
24 Jun 2020
Looking for an older file? The official CurseForge project page is in Resources.