Types of insulation: Styrofoam, Spray Foam, Fiberglass(for a science project- doing research now)
Spraying some foam from a can where it builds a nest will stop it.
Most places use owl sculptors to keep birds awayMight consider buying one after the bird is done and birds fly awaySometimes birds return to where its safeBig owl little bird go bye bye.
Thumb backs would work the same way as they do in shops but you will always get the occasional bird getting caught on themBut it is illegal to intentionally disturb or destroy the active nest of any wild birdIf you must deter birds from nesting in your roof, work to deny access must be done during the winter months when they are not nesting (note: pigeons can nest throughout the year)Check your building each winter, ideally between October and February, or ask someone else to do it for youClean out and seal any holes or gaps as appropriateDo this during the morning to minimise the risk of roosting birds being trapped inIn domestic properties, if there is doubt that all birds have left, fix a fine wire mesh over the entrance so that you can see any trapped birdsOnly make a permanent repair when you are certain that no birds remainIn other words just put a little bit of seed down in a bird house or something to move them away from that area of the house in time the bird will find another place to rest.
styrofoam id the beast practical solution this is the result of my experiance as a civil engineer ang contractor
