Deadening my Roof

[bmk6795 10+ year member]

Hey guys gonna be deadening my roof tomorrow. Just got a quick question, there are holes that go up to the actual roof all over the place. Should i fill these with something or just cover them with deadener? If i should fill these what should i fill them with? Prefer not to use something like great stuff or an expanding foam. Thanks in advance for the help.

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[bmk6795 10+ year member]

I'll throw some pics up when i get offa work