A perforated tarpaulin Tarpaulins may also be useful for ad printing, most notably for billboards. Perforated tarpaulins are typically used for medium to large advertising, or for defense on scaffoldings; the aim of your perforations (from 20% to 70%) is to reduce wind vulnerability. Thanked 29 Instances in 9 Posts https://johnnyiibuc.wikinewspaper.com/3671234/fascination_about_pergola