an indoor green wall in an office in hong kong green walls are found most often in urban environments where the plants reduce overall temperatures of the building. 'the primary cause of heat build-up in cities is insolation , the absorption of solar radiation by roads and buildings in the city and the storage of this heat in the building material and its subsequent re-radiation.
a french drain or weeping tile is a trench filled with gravel or rock or containing a perforated pipe that redirects surface water and groundwater away from an area. french drains are primarily used to prevent ground and surface water from penetrating or damaging building foundations and as an alternative to open ditches or storm sewers for streets and highways. alternatively, french drains may be used to distribute water, such as a septic drain field at the outlet of a typical septic tank sewag
the kitchen cabinet was a term used by political opponents of president of the united states andrew jackson to describe his ginger group, the collection of unofficial advisors he consulted in parallel to the united states cabinet the 'parlor cabinet' following his purge of the cabinet at the end of the eaton affair and his break with vice president john c. calhoun in 1831.
geotextiles are permeable fabrics which, when used in association with soil, have the ability to separate, filter, reinforce, protect, or drain.typically made from polypropylene or polyester, geotextile fabrics come in three basic forms: woven resembling mail bag sacking , needle punched resembling felt , or heat bonded resembling ironed felt . .
pvc/cpvc – rigid plastic pipes similar to pvc drain pipes but with thicker walls to deal with municipal water pressure, introduced around 1970. pvc stands for polyvinyl chloride, and it has become a common replacement for metal piping. pvc should be used only for cold water, or for venting. cpvc can be used for hot and cold potable water supply.