Home improvement projects can be fun: Upgrade your space. Redo your look. Fix a nagging problem. But, as many of us know, they also can be a nightmare, with flaky contractors, repairs gone awry and overblown budgets. Do you tackle a project yourself or hire a professional? How do you find the right contractor for the job? And how do you ensure that you don’t fall victim to a scam? Here’s a guide to help you navigate the potentially dicey waters of home repairs. ...