Commercial roof structures are complex waterproofing systems incorporating pitched tiles alongside single-ply flat roof membranes like PVC, TPO, EPDM, butyl rubber, and hybrid waterproofing systems. Unmaintained roofs accumulate heavy moss, lichen, and silt that retain excess moisture, block internal outlets, and degrade critical seams.
Standard cleaning contractors often treat every surface with destructive high-pressure washing, which punctures delicate flat roof membranes, strips factory tile coatings, and forces water past lap seams into the building envelope.
Directed by Keith Sheehan—an Architectural Technologist and fully certified RESITRIX® flat roof system installer with over 35 years of construction experience—our approach treats your roof as an engineered waterproofing asset. We evaluate substrate composition, membrane age, and seam condition before selecting a non-destructive cleaning method that preserves structural integrity and manufacturer warranties.
A professional commercial roof contractor must adapt the cleaning process to the material—never force the roof into a generic process. Based on roof type and structural condition, we deploy:
Commercial Softwashing: Low-pressure application of DAFM-registered biocides to eliminate organic growth on pitched concrete tiles, slate, and coated surfaces without mechanical abrasion.
Specialist Flat Roof Care: Gentle, chemical-safe cleaning calibrated for synthetic membranes (PVC, TPO, EPDM) to remove buildup without compromising seams, flashings, upstands, or drainage outlets.
Controlled Manual Removal: Gentle hand scraping of heavy moss deposits prior to treatment to prevent drainage line blockages.
Low-Pressure Rinsing: Controlled rinsing designed to clear residue without forcing water beneath flashings or membrane laps.
Keith’s hands-on background as a certified RESITRIX® installer provides expert-level precision around critical roof penetrations, expansion joints, and perimeter flashings. Every project includes site-specific RAMS, SafePass and IPAF certified technicians, and full commercial height-work insurance—ensuring complete safety compliance for school boards, facility directors, and property managers.
