how to avoid the standing of doves on the roof

I assume you are referring to birds  perching on a roof.
A variety of methods are ued for pigeons - and presumably other birds-
 - Scare them away - Owl statues are often used - and loud noises (at
airports they fire off loud blank shells, or use loudspeakers)
 - Spike strips along the most favored areas
 - Electricaly charged wires along the areas involved

I refer you to fugitive-ga's outstanding answer to a similar question
concerning pigeons from some weeks back: 
https://answers.google.com/answers/main?cmd=threadview&id=33458