You have to be the judge of whether you've been generous or not with the
daughter and SIL. If you've built up an account, so to speak, ask him what
you owe and pay him a little more. Follow the other advice, and then ask
the daughter whether he missed any other work or income because of your job,
and possibly buy them or him something for their home, or his toolbox as an
added thanks. OTOH, if your "account" is down: such as having asked and
received more favors and help than you've given, the $20/$40 sounds about
right for Round Rock, IMHO. It's a very difficult judgment call, so only you
will know what is right.

Since this was a new leak, why not turn it in on your insurance? If it's
under the deductible, then you might ask your agent to ask the adjustor what
would be a fair price for the repair and use it as a guideline. If the
flashing was blown loose by the storm, it'd be an insurable event, but it if
was gradual, then it would probably not be.

Micajah