A built up roofing system bur using a modified bitumen layer as the top layer or cap sheet will not attract gravel nesting birds.
How to get rid of black birds in roof.
Just be careful when hanging it.
Look for the following decoys at garden or farming supply stores.
Deterrents frighten birds away using visual repellents and noisemakers.
These screens will allow water to pass through but will prevent birds from nesting.
Using deterrents spraying chemical repellents creating physical barriers and trapping.
Place fake predators on your roof to scare birds off.
So take some time to determine a plan of action.
In order to get rid of birds on your roof as well as prevent them from returning here are some of the most effective methods to try.
What is the best way to get rid of birds.
To avoid attracting these birds to your roof you can use a roof system that is not topped off with gravel.
Then go to your local home improvement store and purchase a gutter screen to place on top of the openings where it meets your roof.
Start by removing any plant debris from your gutters.
Make sure the mesh is spaced no smaller than one and one half inches.
If larger the blackbirds will still be able to get in.
There are four effective methods to keep birds away from your property.
Use wire mesh or bird netting to cover the undersides of rafters and other spots where blackbirds might be tempted to roost.