Subject Matter Expert
John A. D’Annunzio has over 35 years of experience in roofing, building exteriors, and waterproofing consulting and has completed projects throughout the world. He has written five books about roofing/waterproofing and over 100 articles published in construction trade magazines. He has also conducted extensive research in material technology, the results of which have been reported at numerous national and global symposiums and conferences. Mr. D’Annunzio frequently conducts seminars and webinars related to building exterior technology.
Fixr.com Editorial Methodology
Fixr.com partners with a wide variety of experts in different fields of home improvement and design: general contractors, interior designers, construction material manufacturers and DIY experts, among others. Fixr.com editors work closely with them to ensure our information is accurate, up to date, and based on the latest research. Experts answer questions, review cost information or add advice and suggestions based on their experience and knowledge of their specific area of expertise. We also check specialized publications, cost studies, and U.S. government reports. Learn more about our editorial process and sources.