There are professional bee keepers who can remove and relocate the hive without hurting them. Some beekeepers will do it for nothing, others charge. In either event, you get the honey.
I had a big hive in my barn for years but had it moved finally, it was doing damage and I'm allergic to bees. You don't want them in your attic. You might find someone listed in your local directory or ask your county's agricultural extension agent.

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