Choosing and specifying a GAF PlazaDeck waterproofing system is easier than you think. Once you decide how you would like to use the space, just follow these four steps:Step 1... Have a design professional verify your roof substrate
The choice of waterproofing membrane and surfacing layer are often made based on the final use for your PlazaDeck system. To determine the best options for your application, consult the chart titled “Putting All The Pieces Together”.
Waterproofing systems for smaller areas (up to 1000 sq. feet ) like balconies can omit insulation, however the surfacing options for this application are limited to tile embedded in mortar.Before proceeding, a design professional must:
The protection layer must physically protect the roof membrane from the surfacing
materials installed over it, but must not interfere with positive drainage at the
membrane level. It must:
Most GAF PlazaDeck assemblies utilize one of two roof membrane protection materials: Rubber Pads (used with concrete paver surfacing) or Reprocessed rubber pads, min. 3/16” thick (installed under concrete paver pedestals and wood support blocking with concentrated point-loading).
PVC/Polypropylene (used where surfacing load is evenly distributed) Heavy-duty drainage
layer with knit geotextile filter fabric, min. 1/2" thick.
Step 4: Choose Your surfacing Layer...
Surfacing materials selected for walkable roof applications must resist normal usage conditions, including frequency of use, impact loads and concentrated loads, and the weathering effects of the sun, rain, ice, and snow.
The surfacing materials should require minimal maintenance and repair to avoid physically disturbing the roof membrane or contaminating the roof membrane with penetrating sealants and similar treatments. The surfacing materials must be within the allowable weight capacity of the structure, and provide the desired aesthetic appearance.
GAF PlazaDeck Roofing assemblies are available for use with all traditional walkable
roof surfacing materials and systems, including:
As an additional option, extruded polystyrene insulation board, min. 40 psi compressive
strength, can be incorporated into many GAF PlazaDeck Roofing assemblies between
the roof membrane and surfacing materials.
Diamond Pledge™ Guarantee -
The industry’s premier roof guarantee with true “edge-to-edge” coverage. Includes coverage for the entire Weather Stopper™ Integrated Low Slope Roofing System. And unlike conventional guarantees, some systems are even covered for ponding water, blistering, field-fabricated metal, and much more (see guarantee for details).
Well Roof® Guarantee Advantage -
The single best way to extend the life of your roof is to perform regular inspection and maintenance. GAF believes so strongly in this practice that it offers its unique Well Roof® Advantage program: a 25% extension of the length of your Diamond Pledge® Guarantee — FREE — when you invest in a regular maintenance and inspection plan!
Factory-Certified Contractors -
GAF selects only the top 4% of roofing contractors for membership in its factory-certified contractor program. GAF’s workmanship guarantees are available only through this exclusive group.
Cool Roof Central (U.S. Only) -
Learn about the leading energy-saving roofing options that can reduce your operating expenses and extend roof life. Available free at www.gaf.com.
Spec Central -
For architects and specifiers (or property owners with in-house design departments), Spec Central provides a wealth of information for writing roofing specs. Available free at www.gaf.com.
Architectural Information Services -
Architects and specifiers (or property owners with in-house design departments) can access an entire team devoted to the specification process. Available free by calling 1-800-522-9224.
Roof Protection Services -
Some roofing manufacturers allow their sales representatives to do the final technical inspection of your finished roof system. GAF, through Roof Protection Services, uses only experienced technical representatives for these inspections—for your protection!
* Securock® is a registered trademark of the United States Gypsum Company
** Dens Deck Prime® is a registered trademark of Georgia-Pacific Gypsum LLC.
All documents are U.S. English unless otherwise noted