These are the weights of typical actual products.
Green roof weight psf.
Green roof system weights columbia green technologies 79 se taylor st.
They support hearty native ground cover that requires little maintenance.
Therefor a significant amount of attention must be paid to the various.
Mid range 5 inch systems weigh approximately 34 pounds per square foot and are compatible with wood or steel decks.
Asphalt shingles 3 tab or strip 1 95 lbs.
Tray systems are not a viable option for intensive roofs due to the weight.
Intensive green roofs weigh from 35 pounds to beyond 100 pounds per square foot when dry it is all a matter of the soil depth which is affected by the amount of mounding that is used.
The foot or more of growing medium needed for an intensive green roof creates a load of 80 150 pounds 36 68 kilograms per square foot.
Perennials and low shrubs up to 1 5 m.
Small trees up to 6 m.
Heavier intensive green roofs generally require a concrete supporting deck.
Green roofs in environmental terms 5 2 benefits in human terms 5 3 green roof technical considerations 5 5 design considerations 5 8 implementation considerations 5 11 maintenence considerations 5 13 6 implementation resources internet resources 6 1 reducing new york city s urban heat island effect ddc 2004 6 5.
Green roof vegetation type.
Green roof system structure roofs with vegetation blankets consisting of herbs grasses wild flowers or host and nectar plants require a thicker substrate layer than a vegetation blanket consisting of only sedum plants.
Weight loading kg m 2 low herbaceous succulents and grasses 10 2.
When preparing a green roof calculations must always be based on the water saturated weight of the total structure.
Large trees up to 15 m.
Shrubs up to 3 m.
Ft kilograms per square meter kg m 2 source.
Green roof vegetation weight loadings.
Pounds per square foot lb ft 2 pounds per square 100 sq.
Weight of roofing materials.
Extensive green roofs are relatively light at 15 50 pounds 7 23 kilograms per square foot.
Thus the saturated weight of a 3 inch deep system is about 20 pounds per square foot including a mature plant cover.
