Tips on Hiring a contractor
KNOW WHO YOU ARE DEALING WITH - ask for a reference.
MAKE SURE YOU'RE PROTECTED - ask about business liability insurance, workers compensation coverage, business number or GST/PST number, lien regulations and written warranty.
GET IT IN WRITING - Having a written contract is vital. The contract should contain the company name and address, full description of the work, material and products used, start and finish date, payments etc.