Construction projects often involve a complex array of contractors, subcontractors, banks, bonding agents, architects, engineers and so on. With that many parties depending on each other to complete a project, negative statements about the quality and integrity of other peoples’ work often arise. Such statements, if false, may give rise to defamation claims. However, even a false statement may be protected from liability by a “common interest” privilege. Two recent Massachusetts cases address what kinds of statements qualify for common interest privilege protection in matters related to the construction industry.