Can I enter a tenant's apartment without notice?

[Nancy DeSocio]

Hello BP community!

I recently purchased a MFR and have a leak in the roof. The easiest access to the flat roof is from one of my tenant's windows. However, the tenant has been in the hospital since before I bought the property. When I call him, the calls go directly to his voicemail, and his inbox is too full to leave a message. In this case, do I have the right to enter the property without permission so that the roofer can easily access the roof? I could ask the roofer to bring a long ladder (it's a 3-story building), but he can easily just step out onto the flat roof from a window. I inherited a lease that is 12 years old and has no language about the landlord entering the apartment. Not sure if this is a legal question for an attorney or a "common sense" question to do what I think is best. I'd appreciate any thoughts other property owners have on this...thanks!