Why metal roof vents, why not plastic?
The number one reason in Australia is bushfires. It does not matter where you live in Australia you will have a BAL rating bushfire attack level from Bal Low, Bal 12.5, Bal 19, Bal 29, Bal 40 to Bal FZ to flame zone.
The possibility for bushfire can happen anywhere in Australia at any time, which has been proven within the 2003 bushfires in Canberra, with the loss of life and the loss of 490 homes.
There are plastics and there are plastics, however there are none that will withstand the onslaught of a full blown bushfire. So we would advise against the use of plastic roof vents.
What about aluminium roof vents, they say they are OK, however during the 2003 Canberra bushfires whirly gigs were sucked out of roofs like they were made out of tissue paper, we leave that up to your own consideration.
We believe the best metal roof vents are either constructed from stainless or strong BHP zincalume steel. With a corrugated colorbond roof it makes good sense to construct a metal roof vent with the same material as the corrugated colorbond roof, which is usually ·48 zincalume steel under the factory colorbond coating. Sometimes it may be thicker than ·48 however that is the most used application.
Metal roof vents made from stainless steel are very few and quite cost inhibitive.
SO THEREFORE WE BELIEVE THAT METAL ROOF VENTS ARE BEST MANUFACTURED FROM THE SAME MATERIAL AS THE CORRUGATED COLORBOND ROOF
However with a thicker gauge, ·55 zincalume makes a great product. Bluescope Steel claim that zincalume steel imparts corrosion resistance of up to 4 times that of galvanized steel.
All of our metal roof vents are made from ·55 Bluescope zincalume steel so the end user will benefit greatly with their metal roof vents constructed from ·55 Bluescope zincalume steel.