West Virginia imposes a 6% sales tax that contractors are required to collect on both the services and material provided for each job, unless there is a specific exclusion for the work being performed. One such exclusion is if you are engaged in an activity that constitutes as a capital improvement.
In general, construction labor is not taxable. Installation labor of a fixture in most cases is also exempt from taxation, but the fabrication labor involved in the creation of a fixture is taxable.