Instructions on Bird aviaries? Please help me???

ok i want to build a bird aviary but need some tips and advice. i live in Florida and i want to put the bird aviary outside. im going have finches. im planing to build a rectangle one. and was wondering if there is a certain kind of wood i need or a certain kind of metal wire??? any advice would be helpful. dont want to build an aviary and then all the birds die from being allergic to the wood or metal. thank you in advance.