Board Thread:Skyrim/@comment-121.73.91.72-20130523094101/@comment-8089746-20130525000057

Dragonbane never respawned for me, and it's been months and months in my game, at least.

Why do you need it to fight Alduin though? You should be at a decent enough level, you might have access to swords stronger than it, even counting the enchantment. That's an awful shame about your whole house being deleted though, I couldn't imagine... :C

The only other thing I would suggest to help fighting Alduin is Esbern's potion/Dragon Infusion, which reduces melee damage from dragons.