About This Project

During July and August of 2013, Island Pavement Cutting Co., Inc. installed approximately 4,400 SF of Bridge Preservation™ Bridge Deck Membrane (BDM) spray applied tunnel waterproofing membrane on the outside of the Cortlandt Street #1 Line Tunnel.

This was a rather technical project for a number of reasons.  Firstly, the top of the structure had an existing sheet membrane and drainage board system that the BDM spray applied tunnel waterproofing membrane needed to be tied into.  Secondly, the surface profile on the vertical walls was extremely aggressive, with some areas exceeding 1-2 inches.  There were also numerous penetrations, including bolts and pipes that needed to be completely waterproofed.  Finally, there were multiple substrate types including concrete, steel, and existing waterproofing membrane that needed to be coated.  Using Bridge Preservation™ BDM spray applied tunnel waterproofing membrane, Island Pavement was able to quickly and easily waterproof the rough vertical surfaces and the numerous substrates and penetrations present.

After the surfaces were prepared, Bridge Preservation™ Concrete Primer was applied to the concrete surfaces and Multi-Use Primer™ was applied to the steel and existing waterproofing membrane.  Bridge Preservation™ Multi-Use Primer is a specially formulated primer system that enhances the bond strength between the membrane and various substrate types.  The two primer systems took less than an hour to fully cure, and BDM™ spray applied tunnel waterproofing membrane was then applied.

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