FAQs: Green Roof Applications
FAQs: Green Roof Applications
Do you perform blending for green roofs?
“Many of our customers specialize in soil blending and compost manufacturing. Some of these companies have license agreements with national green roof companies and do blending according to their specifications. We simply supply the lightweight aggregates for blending.”
What size gradations do you provide?
“Most companies are using a 3/8” or 1/4″ gradation. More specific blends are available upon request.”
Is one type of lightweight aggregate better than another?
“All types of lightweight aggregates, including expanded shale, clay, and slate, are used interchangeably in green roof systems. All green roof materials are sourced locally since transportation is a significant cost in construction.”
What function do the lightweight aggregates play in green roof soils?
“They reduce the weight of the growing media, add porosity and oxygen to the soil, and absorb water and nutrients for healthy root systems. They also provide good anchorage for root systems and are often used in the drainage media of green roof systems.”
“You will also see lightweight aggregates used in large container plantings for the same reasons. In addition, they help reduce the settling that occurs in container soils.”
