What size hole does this vent need?

The face is 10.75 inches square, so it fits a standard square cutout sized for that flange. Measure your existing opening and check the flange covers it before ordering.

Will the black finish fade or peel?

The finish is factory-applied over galvanized steel and holds up well in normal weather. On a hot south-facing roof, black paint can chalk over many years.

Can it be used on a shingle roof?

Yes. It is a standard static roof louver meant to be set over roofing felt and shingles, with the flange nailed down and sealed. Follow the roofer's flashing and sealant practice.

Does it keep rain and pests out?

The louvered blades shed most rain, but there is no screen. In heavy wind-driven rain or areas with insects, add a screen or choose a vent with one.

Is steel better than plastic here?

Steel handles attic heat and sun better than most plastic vents and will not crack. It is heavier and can rust at bare edges, so touch up cuts.

Is one vent enough for an attic?

Usually not. Most attics need balanced intake and exhaust sized to the space, often a mix of soffit and roof vents. One small louver is a supplement, not a full system.