What's a good way to make planks in a pattern from a vertices pattern (see image) I made this plane of vertices



and I'd like to turn it into a pattern of wood planks.

So far I've tried a solidify modifier resulting in this (great!)



And then a boolean, but I get this


I've played with thresholds, boolean modes, offsets and thicknesses but it always results in nothing, missing planks or random messes of faces and vertices. Any ideas/recommendations?
Select all the faces in Edit mode. Press I (letter not number) to inset, then press I again to inset all the individual faces. Only do a small inset so there's a small gap, then without deselecting the faces, press P and select > By Selection to separate your new faces into a new object.

From there you can extrude the faces up, and delete the object containing the filler that you no longer need.