Each roof was sampled once and is represented by between 12 and 18 quadrats; this number depended on the type of roof, its surface area, and the vegetation.
Luberon Regional Nature Park has strict regulations about how homes in the area look — from the type of roof tiles to the color of the shutters — so the property fits in with the villas and renovated farm houses in the area.
And the chairman of the real property section of the city's bar association, L. Stanton Towne, said his organization had called on Governor Pataki to veto the bill, in part because "in many cases, the act requires disclosure far greater than many sellers could reasonably be expected to give; for instance, whether there is lead plumbing, the type of roof covering".
Based on the results, corrective measures were taken by replacing the type of roof.
Other indicators of household socio-economic status were the type of roof, the occupation of the main breadwinner, whether there was enough food in the house in the last week, and whether the respondent considered the household income sufficient for their needs.
A good overall efficiency is observed near the maximum layer thickness (15 20 cm) for this type of green roof.
The net present value (NPV) of this type of green roof currently ranges from 10%to14%4% more expensive than its conventional counterpart.
Early results show that this extensive green roof system can be a good passive energy savings tool in Continental Mediterranean climate in summer, and that rubber crumbs can be an interesting substitute for stone materials used as drainage layer in this type of green roofs.
For an additional surrogate for social class, the type of roofing on the well owner's home was recorded as thatched, tin, or cement (thatched lowest, cement highest).
