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Envelope integrity is a key concern of any property owner and manager. Water intrusion not only damages materials, unchecked it can undermine structural elements and lead to widespread mold growth. G3 has widespread experience in the control of water intrusion, both with new building as well as restorations.

Roofing is in the forefront of water management issues for properties. As such, the selection of proper roofing systems needs to be made with great care. Roof pitch, substrate construction, intended use (e.g. as a green roof, or water retaining “blue” roof), and system application constraints all must be balanced with the anticipated life cycle of the installation and the owner’s budget constraints.

Waterproofing encompasses a range of conditions beyond the sealing of openings in a wall. Screen-type wall systems, window and door assemblies, and plaza and deck underlayers are but a few of these. G3’s background in controlling and managing water intrusion extends across the range of building types.

Our team’s experience in roofing and waterproofing includes the following locations:


  • Rockefeller Center

  • Waldorf Astoria Hotel

  • RiverCross

  • 30 East 71st Street

  • 73 Worth Street

  • 95 Horatio Street

  • 110-118 Riverside Drive

  • 115 East 87th Street

  • 303 East 57th Street

  • 310 West 106th Street

  • 380 Riverside Drive

  • 666 Fifth Avenue

  • 708 Third Avenue

  • 809 UN Plaza

  • 823 UN Plaza

  • 888 Park Avenue

  • 1220 Park Avenue

  • River Park Towers, Bronx, NY

  • 30 Flatbush Ave., Brooklyn

  • 138 Bleecker Street, Brooklyn

  • 42-03 35th Street, Long Island City

  • 400 Moreland Road, Commack, NY

  • 333 So. Highland Avenue, Briarcliff Manor, NY

  • 1523 Central Avenue, Yonkers, NY

  • BellWorks, Holmdel, NJ

  • Park 80 West, Saddle Brook, NJ

  • 101 Wood Avenue, Iselin, NJ

  • 33 Harrison Avenue, Boston

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