Coax that is exposed to , Weather / Water.
Use RG6 Coax that has the Compression Type Connectors on the ends of the coax.
Not the old crip type connectors.
Not other cheap flimsy coax and connectors.
To make Double Sure that , Weather / Water , does not get into outside connections.
Remove and Discard Rubber Weather Boots , rubber weather boots take in water and hold the water inside the boots , this is not good for connections.
Wrap outside connections with ,
http://www.coaxseal.com.