Z 18 U Lapilli is an exclusively mineral material based on crushed and screened volcanic lapilli of coarse grain size belonging to a single grain size class (10-18 mm).

Properties

• Good mechanical strength
• Lightness
• Vascularity (air, large solid/liquid contact surface)
• Neutral PH
• Mechanical stability (frost resistance)

 Uses:

• for green roof applications in multilayer systems where bulk drainage is opted for.
• as mulch material

Packaging:

• 4 cu m big bag
• Bulk delivery
• 25 l bags