Make sure the contractor is bonded with a reasonable amount of insurance. There are a number of physical injuries that can occur while installing metal siding. The possibility for structural damage is low, but not something you should overlook. If the contractor has a good level of insurance, there is much less for you to worry about.

Contractors doing work that can potentially impact the habitability of your home need to be licensed. Siding falls into this definition. You should contact the local authorities to learn about licensing requirements for siding contractors in your state and county. The contractor should be able to prove that he or she is in possession of these licenses.

It is common for a contractor to ask for a deposit or upfront payment of a percentage of the final estimated cost. This is a reasonable protection for the contractor to help ensure that he or she is paid. However, you should never pay more than 25 per cent or 30 per cent of the total estimated cost. If they demand that you pay more than this, you may want to consider switching contractors.