Vegetative roofing systems
AssigneeFurbish Company, LLC
InventorsBen Jacob Eiben, Michael D. Furbish, Brad Collier Garner
Life of this patent
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Abstract
Vegetative systems are described. In one embodiment, a vegetative system has substantially distinct or separate zones or layers in which each zone or layer performs primarily one of the functions of water retention, a growth medium for vegetation, and weed suppression. An upper may comprise coarse aggregate and serve the primary function of weed suppression; a middle layer may comprise a mixture of coarse aggregate, fine aggregate, and fine organic material and serve primarily as a growth medium for vegetation; and a lower layer may comprise high-density hygroscopic material and serve the primary function of water retention.
Claims6
A vegetative system disposed on a substantially impervious surface, the vegetative system comprising:
- a water retention layer having a depth between approximately one inch and approximately six inches, a water retention capacity, by volume, of at least approximately 80%, and that retains at least approximately 80% of the water retention capacity under 100 pounds of compression;
- and
- a bed of material comprising aggregate particles having a depth between approximately two inches and approximately four inches wherein between approximately 5% and approximately 25% of the particles (by mass) will pass through a 3.35 mm sieve, between approximately 45% and approximately 55% of the particles (by mass) will pass through a 6.3 mm sieve;
- and at least approximately 70% of the particles (by mass) will pass through a 9.5 mm sieve.
Dependencies are inferred from the claim text.