For larger plastering jobs, you should try to get an estimate of how much the job will cost you. The estimate should include everything from material costs to hourly wages and transportation costs. The point is to not leave yourself open for any hidden costs that may be forced upon you later on.

Find references for the plaster contractor you hire. These references can sometimes be found through the contractor, but are most reliable when found independently. This is especially true if you live alone and are uncomfortable with having a stranger in your house with you.

Even plastering contractors need to be insured to legally operate in most states. You need to make sure the contractor you hire is insured to protect yourself both legally and financially.

Find out if the contractor is incorporated as a corporate entity. If your contractor is legally a corporation, then you won't have to send him or her a 1099 at the end of the year. If he or she is not a corporate entity, then you will have to send a 1099 for any services that cost more than $600.