Protected Membrane Roofing Ballast Options & Flexibility

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 Garden 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 vegetated space by a rock curb).

STONE BALLAST

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 10 lbs./s.f. ballast is required, with 20 lbs./s.f. needed at perimeters and at large penetrations.   

Contact Hydrotech for specific installation guidelines.

BALLAST PAVERS

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. 

Contact Hydrotech for specific installation guidelines.              

HYDROTECH'S HYDROGUARD

A lightweight alternative to the typical ballasted PMR Assembly is Hydrotech's Hydroguard® product. Hydroguard consists of Dow STYROFOAM® Insulation with a 3/8" latex modified cementitious layer that provides the necessary ballast, weighing only 4.5 LB/SF. Hydroguard Heavy is also available and consists of a 15/16” latex modified cementitious layer weighing 11 LB./SF. Click here for more information on Hydroguard.

Contact Hydrotech for specific installation guidelines.     

HYDROTECH'S ULTIMATE ASSEMBLY®

An esthetic and practical solution for the roof deck that is to be used as a terrace. Hydrotech provides the entire assembly from the MM6125 roof membrane to the architectural paver. Numerous paver sizes, colors and finishes are available. 

HYDROTECH'S GARDEN ROOF® ASSEMBLY

Hydrotech's Garden Roof Assembly takes the PMR roof to the next logical level - a vegetated 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.  

Recent Press

  • May 21, 2018
    American Hydrotech, a recognized leader in the development and distribution of premium waterproofing and roofing assemblies, today announced the availability of their Protected Membrane Roof (PMR) Planning Guide , a unique, new resource representing...
  • February 1, 2018
    CHICAGO, ILLINOIS (February 1, 2018) The Chicago Blackhawks have captured the hearts of the city of Chicago along with three Stanley Cups in the last decade. The Blackhawks routinely lead the league in attendance at the United Center, and fans were...
  • October 18, 2017
    CHICAGO, ILLINOIS (October 11, 2017) American Hydrotech – a market leader in the development and distribution of premium waterproofing and roofing products and assemblies, today announced the introduction of the InstaGreen® GT-4 pre-vegetated tray,...
  • April 3, 2017
    Wind data is a critical issue to consider when building a new structure. An increase in the number of green roofs on buildings has driven a need for new wind design standards to be written for vegetative roofing assemblies. Richard Hayden discusses...
  • September 27, 2016
    (September 28, 2016) Washington State has always been considered a pioneer when it comes to the adoption of greener and more sustainable practices. One of the most sustainable practices is to reuse an already constructed building and enhance that...
  • July 16, 2016
    (July 16, 2016) Excerpt from an article in Forester Daily News Green roofs – also known as vegetated or garden roofs – are key green infrastructure elements and are being increasingly recognized for their “valuable ability to absorb, reduce, and...

Upcoming Events

    September 24, 2018 to September 28, 2018

    2018 GRHC CitiesAlive Conference

    New York Marriott at the Brooklyn Bridge – Brooklyn NY Event Details
    October 21, 2018 to October 22, 2018

    2018 ASLA Annual Meeting & EXPO

    Philadelphia PA Event Details