Adding second Remoteapp Server

All, I currently have a Remote Desktop (Terminal Server) that will be used for providing RemoteApps to clients in our domain using Windows Server 2012 Standard R2 . The following roles were installed on the one server: Connection Broker, Session Host, Gateway, Licensing, Web Access. My question is if I wanted to add a second server for load balancing/redundancy how would I go about adding the second server to the pool?

1. Would I install the same roles on the second server?
2. Would I need create new certificates for the servers?

Thanks!