What are the current thoughts on a minimum screen size? When we built 10 years ago I think we used 1/8" but maybe it was 1/4”? This is on my to do list to investigate and add more if needed this spring.In construction, we’ve installed all sorts of expensive new attic vents, but on an existing house simply adding fine wire mesh makes them much more ember resistant. This is a common retrofit and there should be a lot of information and materials for the purpose.