Box stores and bargain chains both utilize a revolving door of installers that are paid less than the going rate, which can result in a higher likelihood of issues. In addition, neither of those business models will offer premium products with elite structural performance ratings, which I'd recommend in a severe climate like yours. This site has a tremendous amount of good info about what to look for in your region. There are no board "pros" that service OK, but I'm sure that randy from TX can weigh in with some recommendations.
