Extensive Green Roof Construction

For both of these we need to follow specific green roof construction and maintenance procedures.

Extensive green roof construction.

Moisture retained by saturated media after free draining 40 60 typ. Extensive green roof an extensive green roof system is characterized of its vegetation ranging from sedums to small grasses herbs and flowering herbaceous plants which need little maintenance and no permanent irrigation system the growing medium depth for an extensive green roof system is typically 6 inches or less. These systems are ideal for efficient stormwater. They are differentiated on the basis of plant selection growing medium type and overall cost.

The following steps apply to extensive green roof construction. For an extensive green roof the plants should be able to grow in under 5 inches of soil. Extensive green roofs which are most often used for residential homes do not require watering. 15 to 50 per square foot.

Therefore it is unlikely that a green roof will lead to issues with insurance. It also allows for a formal garden to be installed with paths grass lawn and flowers or pot plants. This is most noticeable in intensive green roofs since there is a thicker and more consistent layer of soil which provides a higher insulating value. A 2006 study by the university of michigan comparing costs of conventional and green roofs showed that on average installing a green roof costs about 22 00 sq.

Typically these roofs will have more soil and some small shrubs as well as the low growing wildflowers and sedums found on an extensive roof. Intensive roof construction is largely the same but may involve additional elements. For a conventional roof. Green roofs can help reduce energy costs for a building by acting as another layer of insulation between the inside and outside of the roof.

The government undertook fire tests for green roofs and walls and concluded that the current guidance provided by the green roof code was adequate and extensive green roofs installed following the code would not be deemed a fire risk. Extensive green roofs. A general characterization of the two types of green roofing systems follows. Generally there are two types of green roof systems.

Green roof irrigation system. Your roof deck be it concrete or screed will need to be waterproofed. Plants for an intensive green roof may be able to have a deeper root system. Green roof components growing media water holding capacity field capacity maximum water capacity astm test.

Moisture retained by media that cannot be removed aka wilt point 12 18 typ. 8 to 20 per square foot. A semi intensive green roof can give rise to a richer ecology with more diverse plant and animal species. Step one primary waterproofing layer.