Newsletters are meant to keep you name in the customer's mind - but not as merely a "sales piece."
Too many contractors serve customers, but don't ever follow up with them. You may service them once and just expect that they'll remember you because you did such a great job. I wish that was true. Studies show that 55 percent of the customers you lose leave you because you paid them no attention.
This means that you are asking these customers to either forget your name or go to the Yellow Pages to find it. Either option is a poor one. That's why newsletters exist.