Green Roof Weight Psf

Weight 1 9 2 6 gal sq h2o ret.

Green roof weight psf.

These are the weights of typical actual products. Therefor a significant amount of attention must be paid to the various waterproofing and root barrier details. On a roof with a slope greater than 4 to 12 the live load limit is typically adjusted downward from 20 psf to 15 psf to allow for the relatively greater dead load on the steeper roof. Green roof energy series part 4.

Intensive green roofs are essentially roof gardens and may also need to allow for the additional weight of paving and terracing furniture and even trees. Ft kilograms per square meter kg m 2 source. 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. Gro featherweight the gro featherweight system is a novel solution for projects that have weight constraints or value engineered ve budgets.

When preparing a green roof calculations must always be based on the water saturated weight of the total structure. Green roof system weights columbia green technologies 79 se taylor st. Pounds per square foot lb ft 2 pounds per square 100 sq. The company s website lists weights from about 18 psf to a little over 45 50 psf or so.

The venny green roof has shallow substrates on two types of roof the first roof is on shipping containers and is designed for a dead load of 250kg m 2 and live load of 100kg m 2. 6 8 depth 6 8 soil 35 55 psf sat. 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.

When weight is good by chris wark energy editor originally posted september 21 2010. The weights of other actual products of the same type may vary. Asphalt shingles 3 tab or strip 1 95 lbs. The type of green roof in question is engineered to be light and doesn t have typical soil with plants see link above.

Weight of roofing materials. The weight of a green roof can sometimes present a structural challenge but for controlling the flow of heat energy that weight is a big benefit.