Keeping ants out of the screen porch

For years, the screen porch was used as a catch all and greenhouse for plants. I am starting to design a morroccan style room for the porch area to make it an extension of a small kitchen. The first step is to make the room ant and insect proof so I caulked the open cracks along the floor and the walls connected to the metal frame for the screen room with silicone caulking. On the screen door, I placed a self stick draft guard to keep drafts and small insects out. Every two weeks, I spray ortho pest control spray to get rid of ants. The room is now insect proof because the screen was repaired too. Morroccan room is on going project and this is the first step before painting. This is an ongoing project that will will take many blog entries.