I just made this code mod that makes it so that the game checks what material doors are made out of to decide whether or not they keep in heat, like it does with other blocks, meaning that if you install it alongside Cellar Door then the Cellar Door will count as insulating blocks just like if you used stone or ceramic or soil blocks instead of a door.

1.19.0 rc1 still working and my favourite door n.n. Prefer a walk-in and also makes a neat entrance for some other stuff. Great mod.

Simple, elegant, essential.

Would love a 1x1 trapdoor for early game, or a separate mod for a low-tech trapdoor that seals. Surely some firewood, leaves, and some other material so it's not tooo easy to make.

Might I suggest adding a 1 block trap door for those of us who like to have access to our cellers from the celing? Maybe just have the sigle slab in the grid with a normal trapdoor for crafting?

Very nice, I've been hoping for a mod like this! Does it work in 1.15.5?

May I also suggest adding some planks to the crafting recipe for the door? I just feel like this sort of door being bound together by only mortar would be a bit weak- and maybe also prone to shattering. Could head-canon it so that there's channels in the slabs that you slide planks into and through, before mortaring together. XP