What kind doors to use?

[Jesse M.]

Currently renovating a duplex. There is a shared front door that leads inside to a shared hallway with 1 unit on ground floor and 1 unit up a flight of stairs. The doors to each unit are currently interior grade hollow core doors. Would you recommend keeping these or upgrading these to exterior grade doors? C neighborhood if that matters.

[Jackie Lin]

If I were you, I would upgrade them to exterior doors with 2 hour fire rating, not only it is good for sound barrier and fire barrier, it is also safer for the tenants. A peace of mind knowing your neighbors can’t get into your unit with a hard kick to the door