If there is hire a roof company to inspect, it may be that you need new "tar" like rubber sealant in the area....way lower cost versus new roof!

You may want to consider silicone based sealants as they work better in wet conditions. 

I would not pay more than $200 if he just does sealant.  

Stain or just a sealant is less maintenance. 

Don't forget the insides of cabinets, closets, laundry chutes, decorative soffits, etc. because every surface will be contaminated.I have been very disappointed with water-based primer/sealant - pony up the cash & get the old-school stuff (oil- or shellac-based).

Based on my research here is what I am thinking I should do.Remove the current drywall | Add Safe n Sound Insulation | add 1lb MLV |Sealant around the walls and outlets | Fire wrap around the outlets then add 5/8 drywall. 

BTW, the roof paint is actually a sealant to prevent water leaks.  

Whomever you hire is going to use mortar or some other sealant (if you end up hiring someone try to be there so you can learn how to do the work - it's always good to know).

Account Closed There is no flooring which is completely pet proof ... we have a full gut renovation underway which can serve as proof of that.That said, if you could get an effective sealant layer on polished concrete that was tough enough, you might come close ... though it would not be much fun in our northern climates.Despite having been bitten by poor pet-owners in the past, we are considering renovating a complete building (5-units) with pets in mind and are looking at commercial grade linoleum - the kind used in hospitals.  

I've always been a bigger fan of quartz though, they're almost as hard as granite for durability but the pores are larger which allows for better sealant retention.