I was born in an island in the caribe just like you, Cuba. and received the visit of huracanes. I recomend to use a concrete roof "placa" , resting in columns, just make it thin about 5" thick, the columns can be made out of 4" or 6" diameter aquaduct pipes use for sewage "new" of course cut to the appropiate high. this should be full with concrete and should have a 1/2" metal bar in the center the placa also should have metal bars across and longitudinal inside the concrete. al support by wood coffer construction.
You might have to invest more but it will be forever, Trust just hire an old masonary and tell what you want to do; to pour the concrete . we use to get a lot of beer and get all the friends neighbors and by noon we were done and then start to kill the cold ones.