Brooklyn Roof Replacement and Plaza Deck Waterproofing 746K

client New York City School Construction Authority (SCA
location 270 59th Street, Brooklyn, NY 11220
school P.S. 746K
description Roof Replacement / Parapet Flashing / Plaza Deck Waterproofing / Roof Accessories

Brooklyn Roof Replacement and Plaza Deck Waterproofing 746K

Army Construction LLC was contracted by the New York City School Construction Authority to perform a comprehensive roof and plaza deck waterproofing system replacement at P.S. 746K in Brooklyn, NY. This project involved the removal of the existing roofing systems, installation of new Barrett cold-applied waterproofing membranes, rigid insulation, roof pavers, and full sheet metal flashing assemblies, ensuring a watertight and durable building envelope consistent with SCA specifications. The work was completed under occupied school conditions, with careful planning, sequencing, and safety coordination to avoid disruption to school operations.

Scope of Work

Fluid-Applied Waterproofing

Installation of **Barrett Ram Primer** and **Barrett Ram Tough 250DM Cold-Applied Waterproofing Membrane**.
Integration of **Barrett Ram 125VP Ply Felt** between layers for reinforced waterproofing.
Application of **Barrett Ram 203 Protection Course** over the completed membrane system to safeguard against physical damage.
Installation of **Barrett Ram 306 Granulated Cap Sheet** at all parapet walls and flashings for superior UV protection.
All flashing and detail work executed per **Barretts manufacturer-approved standards** for a 20-Year NDL Warranty.

Thermal and Surface Protection

Installation of **Rigid Insulation (R-30 value)** meeting SCA and NYC Energy Code performance requirements.
Furnishing and installation of **Westile Concrete Roof Pavers** and accessories, providing a durable, walkable surface for roof access and maintenance zones.

Flashing and Sheet Metal Work

Furnishing of **Stainless Steel Cap Flashing and Coping Flashing** fabricated per SMACNA standards.
Installation of **Stainless Steel Counter Flashing** at exhaust fans, curb penetrations, and roof terminations.

Roof Accessories

Supply and installation of **Bilco Company Roof smoke Vents** as per code compliance.
Coordination of vent curbs, flashing, and penetration sealing with **Barrett system warranty requirements**.

Technical Highlights

Roofing System:: **Barrett RamTough 250** Cold-Applied Multi-Ply SBS System
Insulation System:: Rigid insulation 60psi
Paver System:: **Westile Architectural Concrete Roof Pavers** on adjustable pedestals
Metal Flashing:: Stainless Steel Fabrications per SMACNA guidelines
Drainage:: New cast-iron roof drains with domed strainers and overflow scuppers
Environmental Compliance:: All work completed in accordance with **NYCDEP and OSHA standards** for occupied schools

Project Outcome

The P.S. 746K Roof and Plaza Deck Restoration Project resulted in a fully **modernized waterproofing and insulation system** designed to extend the service life of the facility while reducing future maintenance costs.

By combining **Barretts advanced hot fluid-applied membrane technology** with Westiles architectural pavers and custom stainless steel flashing systems, the project achieved exceptional performance in durability, weather protection, and aesthetic quality.

Army Construction LLC completed the project on schedule and in full compliance with **SCA specifications, manufacturer requirements, and NYC building code standards** ensuring a long-term, watertight solution backed by a **20-Year Barrett NDL Warranty**.