The home need some instant patches - roof leakage, but is currently rented.I assume the best option will be to close on it, get the insurance and fix the leak.

Additionally, his car was leaking oil in my garage and my contract specifically requires that the garage floor is clean and no oil leakage.  

That will stop the air leakage.

There was no evidence of any leakage of combustion gases or hydrocarbons.

In balloon framing you close off the top and bottom of the walls.Actually, there has been a fair amount of research (visit the Building Sciences Corporation library for one source) demonstrating that moisture - from external water penetration or air leakage (or, form the interior if open cell foam is used -  can frequently permeate the roof deck causing deterioration (rotting) of the deck itself and/or mould growth.  

Depending on wind, air leakage, insulation levels, etc you can have some variability in actual temps.

In 2017 we had a special assessment to have our decks repaired due to faulty construction and leakage issues with the commercial unit which spans all 5 residential units.

Energy audit is part of what you are seeking, to determine places where there is "leakage". http://energy.gov/public-services/homes/home-weath...

Hello BPs. Have a rookie question related to maintenance/incidents. Last week my tenant called me saying that the toilet malfunctioned and as a result it leaked water for 2 hours approximately and cause a big flood in...

They will come in and check for insulation values of door windows and walls, air leaks in the structure using a blower door test and also a duct leakage test.