If you don’t own it, it shouldn’t be your responsibility to repair it. The only circumstance in which you should spend money beyond the rent you already pay to fix something that doesn’t belong to you is if you broke it and your rental agreement doesn’t cover accidents. Homes require maintenance, lived in or not, and a homeowner can decide to neglect that at their own peril. If something goes wrong, it’s the landlord’s responsibility to fix it, not the person paying them for the service of having a roof. If they don’t they’ll likely lose a tenant and therefore income, so fixing their investment property is just required investment maintenance, the cost of doing business as a landlord.

I’m well aware many places have laws that touch on this subject, many of which have been heavily influenced by landlords.