GRAVEL BALLASTED ROOFS

• Very economic roofing system
• Fast and easy installation
• No penetration of the roof deck
• Protection of the waterproofing membrane against environmental exposure and mechanical damage,
  making the membrane last much longer
  
  
• Easy to maintain, low maintenance costs
• The noncombustible properties of the gravel contribute to higher fire resistance of the whole roof assembly. The gravel also prevents flames from spreading across the roof surface.

Several Sikaplan® and Sarnafil® single ply membranes are specially designed for use on gravel ballasted roofs where they provide durable, long lasting performance with these benefits:

• They are resistant against biological microorganisms.
• Application is possible at negative temperatures, giving unique flexibility to contractors, their clients and specifiers. 

Gravel ballasted roofs with Sikaplan® or Sarnafil® single ply membranes are conventionally installed.

• The single ply membrane and other roof components, including thermal insulation, are loose laid.
• The buildup is ballasted with a gravel layer of at least 50 mm and 80 kg/m2.
• The gravel ballast secures the roof waterproofing against wind uplift forces.