Flat Roof Replacement on Long Island School
RH Renovation NYC completed a comprehensive commercial low-slope flat roof replacement featuring complete tear-off down to the structural deck, tapered insulation drainage engineering, high-density cover board laydown, and high-performance elastomeric membrane installation for an educational facility located on Long Island, NY. Educational and institutional facilities across Long Island are subjected to aggressive coastal weather dynamics—including heavy salt-air exposure, severe high-wind shear funneled off the Atlantic Ocean and Long Island Sound, driving rain from seasonal nor’easters, and extreme freeze-thaw temperature shifts.
In school environments, an aging flat roof with failing field seams, punctures, or chronic ponding water presents critical risks—not only to structural building integrity but to interior classrooms, gymnasium facilities, and student safety. This project was engineered to strip away an exhausted low-slope roof assembly down to the structural subdeck, re-engineer hydrodynamic drainage pathways, and deploy a durable, code-compliant commercial waterproof membrane system built for multi-decade longevity, thermal efficiency, and minimal institutional maintenance.
Comprehensive Scope of Work & Installation Methodology
To satisfy strict regional commercial building codes and ensure maximum safety for staff and students, our licensed and insured commercial roofing crew executed a multi-phase technical installation protocol:
Complete Tear-Off & Substrate Inspection: Technicians systematically stripped away all layers of the legacy flat roof membrane, saturated insulation, and failing flashing details down to the bare structural deck. A comprehensive structural audit verified deck integrity, replacing compromised decking sections to establish a solid, level substrate.
Tapered Insulation & Hydrodynamic Drainage Engineering: High-R-value polyisocyanurate (ISO) rigid insulation boards and custom tapered insulation crickets were mechanically anchored across the roof field. This continuous slope strategy permanently eliminates standing water collection by directing stormwater fluidly toward internal roof drains, scuppers, and perimeter gutter systems.
Commercial-Grade Waterproof Membrane Application: A heavy-duty, commercial single-ply membrane (such as reinforced TPO or thick EPDM) was deployed, relaxed, and fully adhered across the roof deck using high-tack bonding adhesives and hot-air welded field seams. This creates a monolithic, highly flexible barrier capable of accommodating building structural expansion during severe seasonal temperature swings.
Parapet Wall, HVAC & Penetration Flashing Detailing: All critical institutional penetrations—including heavy rooftop HVAC units, skylight curbs, plumbing vent stacks, drain drains, and masonry parapet wall terminations—were wrapped in reinforced membrane flashing boots, fastened with heavy-duty metal termination bars, and sealed with non-sag polyurethane lap sealants.
Safety Audit & Final Compliance Inspection: A thorough multi-point quality control inspection and seam-probe audit were performed to verify watertight seam integrity, perimeter termination security, and fluid drainage off the roof deck, followed by a complete magnetic sweep and site cleanup.
Project Highlights & Technical Specifications
Service Category: Commercial Educational Facility Low-Slope Flat Roof Replacement & Waterproofing
Project Location: Long Island, NY
Core Materials Used: Commercial-grade elastomeric membrane (TPO/EPDM), high-R-value polyisocyanurate (ISO) rigid insulation boards, custom tapered insulation crickets, heavy-duty metal termination bars, prefabricated pipe boots, and industrial lap sealants.
Key Engineering Focus: Hydrostatic ponding water elimination, coastal wind-shear uplift resistance, occupant safety, thermal envelope optimization, and institutional building code compliance.
Results & Facility Value
By executing a full structural tear-off and installing a custom tapered drainage assembly paired with a heavy-duty single-ply membrane, RH Renovation NYC permanently eliminated the school facility’s water infiltration and thermal loss risks. The Long Island educational facility now benefits from a fully weather-tight, energy-efficient flat roof built to withstand severe coastal storms, protecting student learning environments and securing the long-term structural asset value of the building.
