Look at your contract and all the specifications of the project. See what is written about the installation.
Talk to the contractor. Question their choices.
If not satisfied with the answers, write ... read more
What are some important questions one should ask a contractor when doing a remodel for the first time and what are some important signs to look out for?
Any honest contractor will provide you with copies of their State Licenses and Insurance so you can verify them. If they don't ask - if they hesitate - RUN!