Washington Waterproof Concrete in the Northwest

   

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    Waterproof concrete  technology has recently been introduced in North America. Projects include a large green roof with a small park over a parking structure in Redmond, WA. The designer had originally specified a ten-inch structural post-tensioned deck with a sandwich membrane, followed by a four-inch topping slab to protect the membrane. By using the waterproof concrete technology, the topping slab was eliminated and a nine-inch structural slab was sufficient. This significantly reduced the weight of the structure, allowing the engineer to eliminate several of the support columns, creating additional parking spaces while saving the owner just over $100,000 in initial costs and freeing his company from the possibility of eventually having to replace the membrane. The contractor was also able to carry out construction without worrying about puncturing any membranes or damaging any coatings.

 

    In addition to grass and plantings, decorative concrete walks and an attractive patio with a gazebo highlight the green space over the parking area.  The owners offer the added value of covered underground parking as well as a park-like setting while still satisfying fire access requirements.  This structure has been in service for over two years with a very high degree of owner satisfaction.

   

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