A perforated tarpaulin Tarpaulins are also used for advertisement printing, most notably for billboards. Perforated tarpaulins are usually used for medium to big promotion, or for defense on scaffoldings; the aim in the perforations (from 20% to 70%) is to scale back wind vulnerability. Thanked 29 Periods in 9 Posts https://izmirtente52581.wikigdia.com/6964873/the_fact_about_izmir_pergola_that_no_one_is_suggesting