Unlike the old way of rotating protruding 'birds' fitted to roofs, these new products are concealed and substituted actual tiles for Concrete and Terracotta tiled roofs. For Corrugated/Colorbond units they are attached to the roof, so they can hardly be seen, and have no moving parts which may create unwanted noise or to fail. With the 2009 Cyclones in Brisbane, you can be sure these roofing products will remain attached and intact!

For Corrugated or Colorbond units, simply install 2 to 4 pairs in an average sized home. For Concrete and Terracotta tiled roofs you simply substitute 2 to 5 pairs of tiles which are made of strong 0.55mm base metal thickness Australian Zincalume by Bluescope.

• Sarking is installed in roofs as a thermal barrier to reduce heat entering, but it is an insulation barrier containing air in the roof space.
• Ceiling insulation is intended to reduce the passing of heat or cool, by conduction, between the living spaces and roof space.
• When ceiling insulation is installed in a roof with sarking, the roof space temperature increase by up to 20 degrees Celcius!
• Sarking and Ceiling insulation perform the same function of insulation in the walls, top and bottom of ovens and refrigerators.
• When air remains trapped in the roof space in summer with nowhere to escape, the air gets hotter and hotter as with an oven.
• When air remains trapped in the roof space in Winter with nowhere to escape, the air gets colder and colder as in a refrigerator.
• When air is trapped the roof space in Winter, condensation is created with direct water damage and fungi grows (read Article above).
• Convection is air movement created when hot air rises and can escape when cooler air can enter.
• As this product works because of the Convection Principle, unlike traditional protruding 'birds', these work when there is no breeze!
• The Venturi Principle is that when there is a breeze for example, passes over an opening it draws air from that opening.
• These 'ventilation' tiles are installed in pairs, one tile is for the air to enter the roof space, the other is where the air can leave.
• A series of pairs of 'inlet' and 'outlet' 'ventilation' Tiles are simply installed under the ridge capping and on either side.
• With sufficient pairs of Concrete or Terracotta 'ventilation' tiles installed, your home or building will be more comfortable with lower energy bills.