Traffic Coating

Traffic coating applies to both parking decks and pedestrian decks – both require high performance coatings applied by an expert.

Enduring protection and appeal

Each parking garage is an integration of components functioning together as one. All systems must be in good repair in order to maximize the life of the structure.  Essentially porous, concrete parking decks absorb water, which migrates through the top of the slab through the bottom. leaving chloride deposits underneath, commonly called “efflourescence”. Long term exposure to moisture can eventually cause the reinforcing steel in the slab to corrode, causing the concrete to spall.

To prevent moisture from migrating through the slab, the top surface is shotblasted the achieve profile and remove contaminants, and then coated with typically a three coat urethane coating system. Elastomeric coatings systems are sustainable; designed to be maintained over the life of the structure and not removed and replaced. Neogard’s Autogard II elastomeric coating system has been known to last over 30 years with minimal maintenance.

Urban Waterproofing is Certified to apply Neogard, Pacific Polymers, 3M, Sonneborne, Tufflex, Carlisle, and other high quality elastomeric deck coating systems.

Keys to a successful project…

Traffic coatings are designed to last for man years while under constant use, either from car tires or pedestrians.  It is important at the beginning of the project to make sure the new system will adhere properly to the substrate it is applied to, and adhesion tests are the best way to be sure.  In addition, it is best for the team to review and approve aesthetics prior to mass-application.

Most traffic coatings are not designed to withstand prolonged ponding.  It is best practice is to move the water to drains as soon as possible for both aesthetic and safety considerations, and to ensure longevity of the coating.  If the structural deck is not adequately sloped, leveling mortar/epoxy can be used to create slope.

Applying the right amount of material is important when working with high-performance coatings.  Mill thickness gauges are placed into wet coating, as well as the grid method, where pails of material are strategically placed on the deck surface to show mechanics at which point they should be ready for a new pail of material.

Moisture vapor makes its way through the concrete slabs, especially where those slabs sit directly on grade. Different coatings have different tolerances to this moisture, so it is critical to know how much vapor drive there is before selecting a traffic coating.

Decks, both concrete and wood, need to be sound before applying any coating on top of them.  Spalls in concrete, or delaminated leveling compound in concrete decks, or dry-rotted plywood in wood decks all need to be repaired before installing a new traffic coating system on top of the deck surface.

High performance traffic coating systems sometimes have a strong odor.  While there are odor masking additives, it is best to use fans or make adjustments to intake and exhaust systems when possible to move the odor as quickly as possible.

Parking decks are a significant revenue source for their owners.  While downtime  for the installation of a traffic coating is system is necessary, it is important to be strategic in how the work is phased to keep as much of the parking deck operational at a time.  Pedestrian decks also require careful phasing consideration to maintain access as much as possible.

Successful application of traffic coatings is a team effort, and requires experience in all roles – from the technician who mixes the material at the mixing station, to the crew who pours out the material evenly, to the person who spreads out the material, and finally to the back-roll crew.

Traffic coatings require the addition of aggregate in the topcoat to provide traction.  Without aggregate, the finished coating can be extremely slick, and a safety hazard.  Aggregate, either sand, small rubber pieces, or even walnut shells are applied evenly from a pail.  Even distribution is critical, to prevent ”shiners” (areas where there is no traction) and for aesthetic reasons.

Services we provide include…

  • Vehicular Decks

  • Pedestrian / Balcony Decks

  • Industrial / Loading Dock Flooring

  • Polyurethane Coatings

  • Epoxy Industrial Coatings

  • Acrylic Deck Coatings

  • Vapor Control Coatings

Keeping buildings watertight is often an overlooked detail in construction.  We appreciate Urban’s professionalism and detail attention to the issue. You guys understand what works and what are only quick fixes.  It is a science that I wish more contractors are trained in and take pride in doing.

Thanks for a job well done.

Jay Ransi, UC Davis Medical Center

Examples of this service…