Protected Membrane Roofing Ballast Options
Ballast Options and Flexibility
One of the advantages of using MM6125® in a Protected Membrane Roof Assembly (PMR) is that once the membrane is installed, owners and designers can take advantage of various ballast options (gravel, pavers and vegetative roof) to suit a specific project’s needs. In fact, since MM6125® is keeping the structure watertight and monolithically applied directly to the deck, design professionals can combine ballast/assemblies with confidence knowing that drainage will occur at the deck level regardless of the transition between assemblies (i.e. gravel at the perimeter transitioning to a paver walkway that is separated from a vegetative space by a rock curb).
Typically requires crushed, graded stone placed over a stone filter sheet, rolled out over the insulation. In the field of the roof, a minimum of 48.8 kg/m² (10 lb/pi²) ballast is required, with 97.6 kg/m² (20 lb/pi²) needed at perimeters and at large penetrations.
Ideal for installations where greater wind resistance is required (at building corners, perimeters or the whole roof) or when roof top traffic requires a more durable and walkable surface.
PLAZA DECK ASSEMBLY
It’s an esthetic and practical solution for the roof deck that is to be used as a terrace. Hydrotech provides the entire assembly from MM6125® to the architectural paver. Numerous paver sizes, colors and finishes are available.
GARDEN ROOF® ASSEMBLY
Hydrotech's Garden Roof Assembly takes the PMR roof to the next logical level - a vegetative roof. Reducing the urban heat island effect as well as a solution for stormwater management are only two benefits (of many) this assembly provides. This is sustainable, responsible architecture whose time is here.