Use wire mesh or bird netting to cover the undersides of rafters and other spots where blackbirds might be tempted to roost.
How to get rid of black birds in roof.
If larger the blackbirds will still be able to get in.
A built up roofing system bur using a modified bitumen layer as the top layer or cap sheet will not attract gravel nesting birds.
What is the best way to get rid of birds.
Place fake predators on your roof to scare birds off.
Look for the following decoys at garden or farming supply stores.
Start by removing any plant debris from your gutters.
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.
Netting block off the birds completely from any roof with netting.
There are four effective methods to keep birds away from your property.
Or you can keep your existing roof and place a fine mesh over the gravel so the birds cannot access it.
Using deterrents spraying chemical repellents creating physical barriers and trapping.
So take some time to determine a plan of action.
Deterrents frighten birds away using visual repellents and noisemakers.
Just be careful when hanging it.
Because birds have developed various senses to keep them safe from danger you can scare small fowls away from your roof by using statues that mimic their natural predators.
To avoid attracting these birds to your roof you can use a roof system that is not topped off with gravel.