Roof overhangs serve two critical functions in desert construction. They cast shadows that shield windows and doors from direct sun, protecting finishes from UV damage and reducing heat gain. They also determine what slider door track can be used — a generous overhang allows a sleeker, low-profile track, while exposed openings need a heavier, water-shedding track. For west-facing views where large glass is unavoidable, exterior solar shades on patio columns can drop automatically at peak sun and retract during high winds.