The purpose of a contract is to lay out the terms of an agreement between two parties. The details of the contract, whether there is painting, or construction or wall paper services, etc are very important. Contract law can be very specific, whether to the benefit of the consumer or the contractor. If you are a legitimate business entity, it is always worth it to have an attorney review whatever contract you use. Some of the downloaded "generic" contracts have areas excluded that should be included or removed, depending on the item. Always make sure both parties understand the contents of the contract.