In Gnomoria there is a feature that allows you to replace a wall with another material; wood for stone, for example. Is there a way to do this on Rimworld?
There is not. I believe there is at least one mod that automates the deconstruct/rebuild steps (search for rimworld wall replace mod or some such) but it doesn't do both of them in one step so it will still open the room to the outdoors if it's an exterior wall. When I want to replace walls on my freezer etc, I do it by building an additional temporary wall with a cheap material on one side, then deconstructing the wall I want to replace, rebuilding, and deconstructing the temporary wall.
Yeah I have a few work-arounds, just a little inconvenient. Has this been suggested as a feature?
There is a mod for this. "JTReplaceWalls"
https://ludeon.com/forums/index.php?topic=26210.0