Florida has specific laws, The Home Improvement Sales and Finance Act and Florida's Deceptive and Unfair Trade Practices Act, that are designed to protect consumers from home repair con-artists. Shoddy work will only increase your loss and frustration. In Florida home improvement contractors must be registered with the state. Ask to see this license. Always get any agreement in writing and signed by both parties before work begins.
Verbal agreements can be misunderstood and usually are unenforceable.
A description of the work to be done. All financing information required by state and federal laws. Any warranty agreements. Name and address of contractor and person for whom work is to be done. Never sign a completion certificate until all work is satisfactorily done.