How are fairings built in 1.0?

[ActuallyImad]

I've seen them being used but haven't been able to figure out how to built them in the Vehicle assembly building

[Capt. Hunt]

attach the base part below the payload decoupler, it'll automatically start the bottom of the fairing, move the mouse to manipulate this section of the fairing to the shape you want, then left click to start the next section of fairing, repeat until you've created a complete cone.