4 - Shading And Cooling

Question 1

What are the 3 basic methods of shading buildings?

Answer 1

1. Orientation of building and apertures as well as size
2. Different types of Shading devices
3. Solar control glazing and films

Question 2

What happens when solar radiation hits glazing?

Answer 2

1. Some is bounced back
2. Some absorbed by glazing
3. Transmitted through glass

Question 3

Whats the most effective way to control solar heat gain?

Answer 3

Size of window openings and to stop the heat before it hits the glazing, i.e. external shading

Question 4

What is the ideal % of glazing?

Answer 4

30%

Question 5

Name 6 types of window shading

Answer 5

1. Brise Soleil
2. Overhang
3. Horizontal external blinds
4. Internal blinds
5. Vertical external Louvres
6. Egg crate louvres

Question 6

What is Landscape Cooling?

Answer 6

Low-cost option of cooling with minimal maintenance costs

Traditional method of cooling

Fights urban heat island effect

Question 7

What are the methods of landscape cooling?

Answer 7

Tall trees and plants can provide shading

Plants simply being near buildings immediately reduce temperatures

Plants that cover the ground reduce radiation from the ground

Question 8

How do plants achieve cooling?

Answer 8

1. Shading

2. Evapotranspiration

Question 9

How much does planting trees in a city reduce the temperature by?

Answer 9

Roughly 2.8 degrees

Question 10

How do you take care of Green Roofs?

Answer 10

1. Initial set up
2. Waterproofing
3. Building maintenance
4. Watering and upkeep

Question 11

What is an Extensive green roof?

Answer 11

Simple, lightweight
Hardy plants, succulents, sedums
Little maintenance
Potentially less irrigation
Up to 30 degree slope roofs

Question 12

What is an Intensive green roof?

Answer 12

More like conventional park/garden
More structural requirements
Greater upkeep - potentially irrigation
Higher costs
Mostly flat roofs
Higher potential of public use