GREEN ROOF BASICS
Most green roof projects have the following elements in common:
- a waterproofing layer,
- a protection layer,
- a drainage layer,
- a separation layer,
- a soil layer,
- and plant material.
How these layers are utilized is what makes a LiveRoof® Hybrid Green Roof System from Roof Top Sedums stand above the rest.
Green Roof Considerations:
Most green roof projects have the following elements in common: a waterproofing layer, a protection layer, a drainage layer, a separation layer, a soil layer, and plant material. How these layers are utilized is what makes a LiveRoof® Hybrid Green Roof System from Roof Top Sedums stand above the rest.
The waterproofing layer can be made of various materials from a variety of manufacturers. The waterproofing manufacturer must always be consulted before considering any type of green roof system, as most manufacturers will require some type of protection layer if a green roof is installed over their waterproofing layer. We recommend you check into existing or available warranties during the design phase of your project.
The protection layer shouldn’t hold moisture, such as felt or cloth, and may be made of a material that will inhibit root growth into the roof structure.
All green roofs need good drainage, as standing water can potentially cause root rot, and prevent healthy growth of the plants. Roof drains should be clear, and aggressive root growth needs to be monitored as it could plug drains. The drainage layer in many types of green roof systems can be made up of a drainage board, rock layer, or a drainage mat. Or, as in the LiveRoof® Hybrid Green Roof System, the drainage layer can be designed right into the bottom of the module, eliminating the need for an additional and costly extra layer.
The separation layer is usually a material separating the soil and drainage area, yet allows water to pass through. The LiveRoof® module acts as a separation layer and eliminates the need for an additional separation layer.