When larger pests such as rats, squirrels, bats, birds, skunks and snakes are no threat, a single layer of this new product provides insect level exclusion down to 0.026" in addition to reasonable open area.

Galvanized 30 Mesh Soffit Vent Screen

G-30 is annealed and electro-galvanized after weaving.	Wires Per Linear Inch	Soffit Screen Opening		Wire Diameter After Galvanizing		Open Area
		Inches	M.M.	Inches	M.M.
	30 Mesh	0.026"	0.658	0.0074"	0.188	60.5%

If the exclusion of bugs is the objective, the screen specification should be strong enough to exclude rodents and birds with the aperture (opening) in the range of 0.020" to 0.060" which will prevent entry of most insect pests.  When utilizing smaller apertures, consider the reduction of open area, additional screen area (vents) may be required.

Stainless Steel Soffit Vent Bug Screen

SSV-12 is plain woven stainless, also available in T-316 by order.	Wires Per Linear Inch	Soffit Screen Opening		Stainless Steel Wire Diameter		Open Area
		Inches	M.M.	Inches	M.M.
	12 Mesh	0.060"	1.52	0.023"	0.58	52.4%

When planning allows, continuous roof or perimeter screens can provide substantial useable ventilation area, allowing a higher allowable reduction in the percentage of open area available through the screen.