Poly Tarps are certainly not suited to masking objects that call for breathability mainly because poly tarps don't have sufficient Room amongst their particles to allow the passage of air. Pergola should be hooked up to the house a arbor / arbour or gazebo isn't hooked up to the house. https://pergola09639.wikijournalist.com/5214722/5_simple_statements_about_izmir_awning_explained