The roofing at the 18th floor had its original built-up asphalt inverted roofing membrane assembly (IRMA), which was nearing the end of its serviceable life. The existing gravel/paver ballast was removed to allow for removal of the old membrane and installation of a new, two-ply, modified bitumen membrane roofing assembly with liquid applied flashings at the number of penetrations, including new tie-backs. New installation included a vapor barrier, polyisocyanurate insulation, cover board and two-ply modified bitumen roofing.
Our team was entrusted by Ownership and management to provide architectural engineering services for the roof membrane replacement project, including preparation of drawings and specifications, bidding services, and contract administration services. The success of any roofing replacement project is in the details, and K&H was onsite regularly during construction to document unique conditions and develop practical solutions to ensure long-term durability of the new roofing system. K&H also coordinated site visits by the new membrane manufacturer’s technical representative to ensure the installation met their requirements for a long-term warranty. The project finished on time and on budget, and the building owner will have a worry-free roof for the foreseeable future.
10/2012 - 10/2012
Allysia Youngquist, Associate Principal
David Weirick, Associate III