hat
Yon Ballast do kay Plastics oswa EPDM ki ka mande pou nan excès de 1,000 liv pou chak 100 pye kare, pandan y ap yon tèrmodursisabl mekanikman tache oswa konplètman respekte oswa Peze manbràn Plastics 33 liv pou chak 100 pye kare.
eng
A ballasted thermoplastic or EPDM roof may require in excess of 1,000 pounds per 100 square feet, while a mechanically attached or fully adhered thermoset or thermoplastic membrane weighs 33 pounds per 100 square feet.