These are each about 1 foot

The flaps go on at the top of each section to hide the lights

After delivering the first one (which implies there was a second one), I discovered that my measurements were wrong. The space for the vivariums were supposed to be 24" tall each, not 18" tall each.

Scraping up the window seal that was used around the flashing and under each sleeper.

The original deck had window seal under each sleeper for additional protection of the membrane.