Green Roof From Above

In some cases a green roof may include thermal insulation typically a layer of extruded polystyrene.

Green roof from above. Green roofs save energy compared to uninsulated roofs or poorly insulated roofs or even better black poorly insulated roofs. While this can be positioned below the roof deck installation above the waterproofing known as an inverted green roof is preferred as it further protects the membrane from condensation and physical damage. Over a black roof flat is easiest but sloped can work goes insulation then a waterproof membrane then a barrier to keep roots from poking holes in the. Green roofs also referred to as vegetated roofs eco roofs and roof gardens consist of a layer of vegetation that covers an otherwise conventional flat or moderately pitched roof.

Advice should be sought from a building energy consultant to establish the value of additional insulation considering the insulating properties of the green roof assembly substrate. In other words go above r 20 and make green roof decisions for other reasons than energy. In truth this should be the future as this approach provides the greatest range of benefits. Once you have more than r 20 in a roof assembly that is you meet the code things pretty much don t matter.

The smartest green roof is one where the green roof element above a blue roof is a biosolar roof a green roof that houses solar panels. Green roof systems may be modular with drainage layers filter cloth growing media and plants already prepared in movable often interlocking grids or loose laid built up whereby each component of the system may be installed separately. A green roof system is an extension of the existing roof which involves at a minimum high quality water proofing root repellent system drainage system filter cloth a lightweight growing medium and plants.