Curtain walls - horizontal slither of wall between windows

[Christiaan]

I have a project with a stairwell which is glazed with a curtain wall to its external wall. I've done this simply by using a plugin window symbol on each floor drawn from floor to floor (3 metres).

There are two problems with this approach. One is, on my model, I end up with a tiny slither of horizontal wall between each window head and sill.

The other is I end up with a double thickness head/sill where each window meets. If I simply increase the height of each window by the thickness of the head/sill this exacerbates the first problem making the bit of horizontal wall showing bigger.

Is there a better way to approach this? I'd prefer to keep using a window for each floor/layer if I can. I could live with the double thickness head/sill if I could get rid of the slither of wall between each window.

[islandmon]

Why not just create 2 new complementary window symbols then ungroup & edit them ... lower without head & mullion and the upper without sill & mullion.