Creating a mesh with projected curves and how to close them?

I am attempting to create a triangular mesh to emulate the building attached. I have created an outline of the shape and projected it onto the mesh of the building, but when I try to create another mesh (as it’s a different material) using these projected curves it doesn’t work. The projected curves are sometimes split too and I’m not sure how to join them.
I’ve tried merging all the shapes and forming a mesh, doing a Delaunay curve but they either don’t work or have weird parts added/missing. I tried doing a weaverbird but there was always an error. I have resulted in doing a Sweep2 curve using the outer edges of the shape’s outline to be the rail curve, but there’s still a weird pattern in the mesh. I’m new to Grasshopper so I’m not sure how to fix it. Picture and file attached.1204367440_80.177.117.97

Coursework City Hall (477.1 KB)