If the birds come back, most birds can be deterred by a rubber snake (some are persistent, though and wont be deterred by 'em). I'd try taking a little bit of dicor sealant and attach a couple of them to the roof top. Leave part unattached, though, so can wiggle in the wind (plus you might want easy removal of snakes). House parents had when I was little had cedar siding and we had to do that to keep woodpeckers from pecking the wood.
Side note - woulda saved NASA tons of $ if they would have done that when shuttle insulation was being attacked by woodpeckers.
2012 Keystone Vantage 32FLS