Green Roof Weight Psf

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.

Green roof weight psf.

Weight of roofing materials. The company s website lists weights from about 18 psf to a little over 45 50 psf or so. Tray systems are not a viable option for intensive roofs due to the weight. When preparing a green roof calculations must always be based on the water saturated weight of the total structure.

Asphalt shingles 3 tab or strip 1 95 lbs. When weight is good by chris wark energy editor originally posted september 21 2010. Pounds per square foot lb ft 2 pounds per square 100 sq. Weight 1 9 2 6 gal sq h2o ret.

An interesting example of an intensive green roof is manaton the award winning private house on dartmoor that uses local meadow grass to blend the family home into the landscape. The type of green roof in question is engineered to be light and doesn t have typical soil with plants see link above. 6 8 depth 6 8 soil 35 55 psf sat. These are the weights of typical actual products.

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. 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. Therefor a significant amount of attention must be paid to the various waterproofing and root barrier details. Gro featherweight the gro featherweight system is a novel solution for projects that have weight constraints or value engineered ve budgets.

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. 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 system weights columbia green technologies 79 se taylor st. 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.

The second trussed roof is designed for a dead load of 160kg m 2 and a live load of 40kg m 2. Green roof energy series part 4.