Public Adjuster fees- (For new money claims)

[Mak K.]

For Texas/Houston. I already have initial settlement amounts from the insurance. I feel there is some areas where insurance is short. I am looking for a Public Adjuster but wanted to know about the fees per Texas law. So for example, if I am already getting $10K settlement check, I would like to hire a PA for additional claims. But it does not make sense for me to pay PA a fee on the amount $10K. It has to be on the new money correct?

Is 10% a good fair fee. I had a PA tell me 20% on new money.

Note- I have 5-6 properties for roofing claims I can hire him for.