Protect Your Investments

Plaza decks are located at or above grade level. They are public areas accessible to pedestrians and in some cases vehicles. Covered by concrete, pavers or in some cases vegetation, they may protect valuable commercial or office space, storage or mechanical areas, or parking.  Plaza decks are waterproofed to protect the structure, their occupants and the property beneath them from water and moisture penetration.

Plaza decks require special attention since they may hold water for a period of time after precipitation, and the waterproofing system is buried under the overburden making repairs challenging and costly.

Choosing the right waterproofing system is one of the most important decisions you will make on your project.  Below are a few key benefits to a plaza deck protected by a Sarnafil waterproofing system.

plaza deck
Sarnafil Waterproofing Benefits:
  • Proven Sarnafil membrane
  • Factory controlled membrane thickness
  • Easy and safe to install
  • Puncture resistant
  • No dangerous and environmentally unfriendly asphalt and blow torches
  • Watertight with hot-air welded seam overlaps
  • Root and decay resistant membrane
  • Membrane designed for extreme conditions such as low alkaline levels, fungi, bacterial organisms, constant dampness and ponding water
  • Self-adhered membrane mitigates potential water migration
  • The bright orange Sarnafil G 476 membrane makes it easy to identify and inspect, to maintain high levels of quality assurance and control during construction
Do I Need to Waterproof a Plaza Deck?

If your building is like most, it has critical areas inside the building that must be protected from the damaging effects of water, moisture or other contaminants. If these areas are covered with overburden such as earth, landscaping and pavers, it can be a challenge to remove the overburden and determine the cause should a leak occur. As a result, one of the most important decisions you have to make is the waterproofing system.

Without proper waterproofing it is a question of when, not if, water infiltrates the structure. Structures move and settle with time. Structural movements or deficiencies cause cracks and openings in the structure. The cracks and openings create a pathway for water and moisture to enter the building. Water infiltration not only affects the usage and value of a building, but also has the potential to propagate mold and fungus growth. A building owner can be faced with future repairs and mitigation actions that could cost thousands. Because of this, it is important to not only waterproof your building,but to choose a waterproofing manufacturer whose performance history speaks for itself.

Waterproofing Systems:

It is All About the Membrane

Puncture Resistant

Waterproofing membranes must be tough and highly puncture resistant to withstand potential damage during and after installation.  Highly puncture resistant, the Sarnafil G 476 waterproofing membrane and its bright orange color makes it easy to identify and inspect to maintain high levels of quality assurance and control during installation.  The G 476 membrane is available in a range of thicknesses to match your application, overburden type and specific project requirements.

Root and Decay Resistance

Many waterproofing membranes are not resistant to root penetration.  They fail due to root infiltration into the field seams and flashings.  Roots are very aggressive and can penetrate certain types of waterproofing materials. The waterproofing system must be resistant to roots and should not deteriorate in damp environments. The Sarnafil G 476 membrane is inherently root and algae resistant and requires no additional barriers to be added to the system.  Sarnafil membranes have passed the most stringent European tests for root resistance including both the German FLL and the Swiss SIA 280 standards. The FLL standard test exposes the waterproofing membranes to 4 years of accelerated root growth.

Hot-Air Welded Seams and Flashings

Faulty seams and details are a common source of leaks in green roofs. Some waterproofing membranes use sealants, adhesives or tapes to secure the seams, but because the Sarnafil membrane is thermoplastic, seams and flashings are welded together using Sika’s automatic hot-air welder, the Sarnamatic. When welded together, the sheets become one monolithic layer of material impervious to moisture infiltration.