Shade is a direction, not an amount
A structure that reads as generous shade at noon can throw its shadow entirely off the seating by five, which is the hour anyone in Texas actually wants it. West and southwest exposure is the problem worth solving here: late-afternoon sun arrives low and sideways, and an overhead structure does very little against it. That is what pushes the answer toward louvre orientation, a deeper overhang on one side, a screen or planting at the west edge, or simply moving the seating rather than covering it. Where the shade falls at the hour you will use it is a better brief than how many square feet of roof there is.




