On the other hand the additional cost possible water usage to irrigate the plants and required ongoing maintenance may make them less appropriate.
Vegetative roof cost.
Because of the structural demands they place on buildings intensive vegetative roofs are not practical for existing buildings with very few exceptions.
Studies worldwide have clearly demonstrated that vegetative roofs make a positive impact on their local environment that ripples through the larger ecological and economic systems they affect.
Vegetative roof systems are slowly but surely growing in popularity as a means of increasing green spaces and reducing energy costs in urban areas.
A properly designed and installed extensive green roof system can cost 108 248 m2 10 23 ft2 while an intensive green roof costs 355 2368 m2 33 220 ft2 however since most of the materials used to build the green roof can be salvaged it is estimated that the cost of replacing a green roof is generally one third of the initial installation costs.
For an intensive roof you are looking at costs anywhere from 30 220 per square foot.
A vegetated roof from tremco is one of the most environmentally responsible attractive and cost effective solutions available to the meet the swelling demand for sustainable facility construction and management.
Building owners sustainability officers architects and facility managers recognize the vital role a vegetated roof can play in.