The black powder coated, 304 stainless steel provides greater resistance to pitting corrosion than other grades of steel. The 1.62mm aperture and 42.5% open area means Guardian provides excellent visibility and airflow. While 304 steel is .6mm diameter wire, it is ultra-high tensile giving the mesh its strength to ensure it passes the shear and knife shear parts of the Australian Standards security test (AS5039).

Bushfire

• Bushfire prone zones require that openable windows must be screened with corrosion-resistant steel, bronze or aluminium mesh with an opening of less than 2 mm x 2 mm (AS 3959-2009). The fire attenuation test (FS 4302/3572) shows the reduction in radiant heat flux level provided by the screen.

Energy and UV Light

• Screens provide ventilation but can also keep solar heat and UV light out during summer, and reduce heat loss during winter. WERS testing and testing to the European Standard (EN 14501) show the reduction in solar heat and damaging UV light, and reduction in heat loss, provided by the screen.

Corrosion

• Whenever two different metals interact there is a risk of corrosion. The tests (AS 2331.3.2 and AS 2331.3.1) to show corrosion-resistance are the acetic acid salt spray test and neutral salt spray test.

Insect Protection

• The mosquito protection test tests a screens ability to keep mosquitoes out over an extended period of time.

Fall Prevention

• The National Construction Code (NCC) (BCA) requires that window openings be either restricted or screened, in certain circumstances, to prevent children falling. Screens that resist an outward horizontal action of 250 N meet the code and mean that window restrictors, that prevent the window being open more than 125mm, can be removed.