The Association for Preservation Technology International (APT) is a cross-disciplinary, membership organization dedicated to promoting the best technology for conserving historic structures and their settings. Membership in APT provides exceptional opportunities for networking and the exchange of ideas.
The American Association of Architects (AIA) has been the leading professional membership association for licensed architects, emerging professionals, and allied partners since 1857.
The International Concrete Repair Institute (ICRI) was founded in 1988 and is dedicated to improving the quality of concrete restoration, repair and protection, through education of, and communication among, the members and those who use their services.
The National Affordable Housing Management Association (NAHMA) is the leading voice for affordable housing management, advocating on behalf of multifamily property managers and owners whose mission is to provide quality affordable housing. Founded in 1990, NAHMA is advocate for professional standards for affordable housing providers. Its membership today includes the industry’s most distinguished multifamily managers, owners, and industry stakeholders.
The National Chimney Sweep Guild (NCSG) is dedicated to promoting the success of its members by providing progressive services, encouraging professionalism and ethical accountability and advancing the chimney and venting industry through public awareness of the trade. Membership is open to any chimney-related company, be it manufacturer, supplier, distributor or service company.
Cathedral Stone Products, Inc.
The leader in scientific masonry restoration