About Shading

*The Design of Ecological Buildings: Shading Traditional shading technology New shading technology

The Design of Ecological Buildings Lighting and ShadingInternational Seminar on Green Housing, Guangzhou, China, June 2002

*What not to do - Beijing housing: vegetation but not much shading


*What not to do - Balconies are enclosed and no longer provide shading


*What not to do worst case

Which way is south? Where is the window shading?

Can occupants possibly be comfortable without air conditioning?


*Mediterranean ClimateClosest to the ideal climate - warm but dry with mild winters. People must protect themselves from the intense heat of summer and extreme light by shading and thermal mass.

Life slows down in summer, as cooling is not always affordable.

Arcades and verandahs create microclimates merging the bright outside with the cold dark indoors


Marine West-coastal climateNot too hot, not too cold the oceans have a calming influence on the temperature on land. The strong winds and rain that come with the cold winter make this a good environment for people to work in, as long as they have warmth and protection

A balance is required between daylight and insulation large windows allow natural lighting and ventilation.The low embodied energy of Georgian houses, using brick, wood and glass, has proved very sustainable for over 200 years


*Subtropical ClimateA pleasant climate for most of the year, but summers are humid so ventilation is a necessity.

The Japanese and Chinese developed systems of dynamic walls to create buffer zones between inside and outside, providing more comfortable summer spaces.

Houses in the southern US use the porch as a buffer zone. In Japan the sliding screens allow maximum cross ventilation. Chinese roundhouses contain a protected fully sustainable community


*Solar ShadingVilla Shodhan, AhmadabadUnite Building, Marsailles, FranceShading devices and roof gardens provide excellent shade and comfort for south facing walls


*Window shading inMumbai, India


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*A school in Gujarat, India note the depth of the facade


*Solar ShadingProtective shading in Brazil. Adjustable louvers between fixed vertical concrete fins


*Housing in Zimbabwe another deep faade and a good use of pre-cast concrete


*New facade technologies many new high rise buildings in Europe are experimenting using double skin wall technology- allowing natural ventilation and adjusting to summer and winter climate conditions


*Shading Design

1. Determine when shading is needed


*2. Determine elevation and azimuth of sun when shading is needed


*3. Choose a shading device fixed .


* or movable


*In hot climates, south-facing windows are best because they bring in the least heat


*4. Determine size of shading device

Example: movable south-facing shading


About Shading

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