The Problem & Initial Inspection Findings
Severe water intrusion along the top-floor residential units caused by deteriorated parapet mortar joints, fractured coping stones, and a 20-year-old built-up roof that had blistered and delaminated.
Comprehensive Scope of Work
Phased Construction Methodology
1Phase 1: Diagnostic Audit & Permitting
Performed thermal moisture scan of the roof deck, calculated structural weight tolerances, and filed NYC DOB Work Permits under General Contractor #NYC-2005-8942.
2Phase 2: Demolition & Substrate Prep
Removed failed roofing plies to expose structural concrete slab. Cleaned deck and rebuilt deteriorated structural brickwork along all four parapet elevations.
3Phase 3: Thermal Insulation & Membrane Welding
Installed tapered polyiso insulation to direct water toward internal scuppers. Hot-air welded TPO seams at 1,000°F creating a monolithic, waterproof barrier.
4Phase 4: Flashing Integration & DOB Sign-Off
Counter-flashed all parapet walls, chimney chases, and vent stacks. Coordinated DOB inspection and secured complete Certificate of Correction.
Engineering Challenges
Executing a complete roof tear-off and heavy masonry reconstruction on a fully occupied 6-story apartment building during mid-autumn wind conditions without disrupting tenants or blocking sidewalk pedestrian flow.
Final Verified Result
100% moisture elimination with zero post-construction leaks through multiple winter freeze cycles. Energy bills reduced by 18% via solar-reflective white TPO, backed by our 10-year written workmanship warranty.
Contracted Service Divisions:
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Mega Contracting NY Group Inc. provides transparent itemized estimates with full DOB permit coordination across all 5 boroughs.