WDP performed an investigation and repair design of the exterior masonry façade on the 160,000 SF 8-story building (previously known as the Norfolk & Western Railroad General Office Building South). The investigation focused on evaluation and identification of sources of leakage and structural distress in the original 1930s era brick masonry and windows, as well as the new single ply roofing assembly and curtain wall assembly constructed in 1999.
WDP’s repair design services included the removal and redesign of the masonry parapets; selective masonry veneer repairs and pinning; masonry tuck-pointing; window repairs with selective window removal; replacement of window lintels and flashings; replacement of through wall masonry flashings; curtain wall repairs; new roofing assembly design and plaza waterproofing repairs. The building is listed on the National Registry of Historic Buildings. WDP submitted the drawings and specifications for review to the Department of Historic Resources (DHR) and accommodated all their respective comments and changes.
The ballasted single ply roofing membrane was failing and leaking at various locations. Since the repairs to the parapet walls were extensive, a new system of counter flashing was designed during the façade replacement project to permit easy replacement of the roofing system. Therefore, a separate project was conceived to replace the single ply roofing with a new fully adhered assembly, as well as a new inverted modified bitumen assembly for roofs with low clearances due to existing mechanical equipment. Through thoughtful planning, WDP was able to modify the details such that the roof replacement could be constructed seamlessly with the previously completed façade repairs.
ServicesFaçade Investigation & Repair
J. Eric Peterson, P.E., Principal, Chief Executive Officer
Roanoke Higher Education Center