How? - You redirect the heat back to its source
In summer Reflect the heat back to the sun
In winter Reflect it back to the heater
The double-sided, multi-layered Thermal Control Membrane (TCM) works both ways when installed correctly.
Above the ceiling 
On external walls 
Bulk insulation, such as fibreglass, 
traps heat in air pockets, slowing
down (not stopping) heat movement.
In summer, above the ceiling, downward moving heat is temporarily stored in air pockets formed by the fibreglass and some moves into the home.
In winter, above the ceiling, some upward moving heat is stored in air pockets formed by the fibreglass and some moves into the roof space, then to the outside air.
To reduce the use of air-conditioners in summer and heaters in winter place TCM on top of the bulk insulation
<< TCM on top of bulk
insulation
The upper facing surfaces reflect to heat up and the downward facing surfaces reflect the heat down.
If you live in a hot climate which has mild winters keeping heat in is not a concern.
Your concern is to keep heat OUT so don't bother to install bulk insulation.
Install TCM as shown in the images below:
Partial installation >
Completed installation
> 
Here are some great TCM features and benefits
1. TCM can be placed between the joists, instead across them, making installation easier and faster.
2. Staples are not required, making it safer, faster and easier to install.
3. TCM does not readily conduct an electrical current, making it safer to install and safer for future attic access.
4. Light weight - TCM4 weighs about 60 grams per sq m (2 oz/sq yd),making it easier to install and easy to transport, (180 sq m of TCM4 can fit into a box 500mm x 500mm x 300mm).
5. Highly reflective - can reflect up to 98% of the heat producing infra red rays, making it cooler in summer and warmer in winter
Ventilation Why mention ventilation here?
Because hot air, built up in the attic (roof space) must be removed to allow any insulation a chance to work efficiently.
Natural airflow is best but difficult to achieve so alternatives must be adopted.
For maximum heat extraction investment in air 'extractors' is your best option.
Power extractor
fan 
http://www.savenrg.com/venting.htm
Wind driven extractor
fan 
http://www.windworker.com.au/index.html
Solar Fans
The concept is great but do they really work?
Solar fans are adversely affected by the lack of sun, which could be the result of cloud cover, shade from trees and tall buildings, and sunset.
After sunset there is, usually, in the home, still a lot of stored heat to be dispersed.
In hot climates, comfort levels within the home, without air-conditioning, are not normally reached until many hours after sunset. With block homes the heat is moving in all day and night - 24/7
There needs to be more testing, in-situ, of solar fans to get their true value.
Soon available in Australia is a combination wind/solar fan - when the sun goes down the wind continues to extract, which would go a long way to resolving the residual heat problem.
For more information on ventilation go to http://www.savenrg.com/venting.htm
For product purchase or more information phone,
mobile 04 21 90 21 90
This Web Page Created with PageBreeze Free HTML Editor