Fire doors

[Sarah Raburn]

I have a friend who is a tenant. Her kids sleep walk and open doors, she has found one of them outside before. So she attached a lock on the top of the door from the inside to keep her kids from sleep walking. She also got permission from her landlord before she attached them but didn't get it in writing. Now the landlord is coming at her saying she needs to replace the doors because they are "fire doors" and the screws she used "damaged" them. So my question is, does she legally have to replace the doors because a couple screws? Or can she just the screws out fix the doors with putty? Plus there are about half a dozen requests from the tenant to the landlord to fix garbage disposal, window, locks, ect.