All Green Roof Solutions products made in America

All products made in the USA unless otherwise noted.

Green Roof Solutions
Green Roof Solutions drainge cores work with the maximize green roof benefits by improving drainage and avoiding clogging.
Drainage Cores
Extenduct
/ Extenduct 2
/ Retenduct
/ Retenduct 2

Green Roof Solutions drainage cores are hybrid products that primarily allow for drainage and aid in filtration and water retention, depending on the product.

GRS Extenduct is a 40% recycled drainage core in a waffle pattern with a geocomposite fabric bonded to the top side. The design creates an open and continuous flow path even under high loads. The filter fabric top layer prevents clogging from the growing media, and the waffle entanglements sit directly on the root barrier.

GRS Extenduct 2 includes an additional geocomposite fabric bonded to the bottom side that lies against the root barrier for added protection.

GRS Retenduct is a multifunctional layer consisting of a 40% recycled drainage core in a waffle pattern with a 100% recycled moisture retention mat upper layer. The design creates an open and continuous flow path even under high loads. The moisture retention top layer helps to retain water above the drainage layer. The waffle entanglements sit directly on the root barrier.

GRS Retenduct 2 includes an additional geocomposite fabric bonded to the bottom side that lies against the root barrier for added protection.