Our lanai is not enclosed. It faces ENE and sometimes get fierce rainstorms with wind. That kind of rain overloads the "super gutter." There are three 2" holes drilled in the concrete near the edge of the birdcage allowing the water to drain. The furniture is cast aluminum, the upholstery is Sunbrella. After experience living on a sailboat constantly exposed to the elements and under a bimini made of Sunbrella, we don't worry about it.
|