What is PermaTill?

Stalite PermaTill is made of Expanded Slate produced by firing a special slate (compressed volcanic ejecta) through a rotary kiln at temperatures in excess of 2000 ° F. This creates a durable, lighter, non-toxic, porous granular that is sterile and environmentally inert. As it exits the kiln the material is sterile, inert and ceramic. Some crushing may be performed to facilitate final screening in a screening system. PermaTill has a pH of about 8.5 so it is ideal for the typically acidic native soils in the eastern United States, however because it is inhert it will not change the soil chemistry. PermaTill is a highly porous, low-density material with a bulk specific gravity of approximately 1.45 to 1.60, and a dry/loose unit weight of approximately 48 to 55 pounds per cubic foot, (769 to 881 kg per cubic meter). PermaTill has low absorption, so the pores act as tiny reservoirs storing moisture and any available soluble nutrients which are easily released and available for the roots. It will not degrade, decompose, compress, blow, or float away, therefore it does not need to be re-applied year after year.

Stalite PermaTill is the Horticultural Division of Carolina Stalite Company. To learn more about Carolina Stalite Company and Stalite PermaTill lightweight aggregate please visit www.stalite.com.


Meet your Stalite PermaTill Horticultural Representatives


Chuck Friedrich, RLA, ASLA, GRP
Horticulture Division Manager

Chuck Friedrich is a Horticulturist and Landscape Architect and serves as the Manager of Stalite’s Horticulture Division and directs Research and Product development for horticulture and sustainability. He received his Master of Landscape Architecture Degree from North Carolina State University (’85) and his B.S. Degree in Ornamental Horticulture (’80) from Delaware Valley College of Science and Agriculture, Doylestown, Pa.

Chuck is a member of the American Society of Landscape Architects, NC Landscape Contractors Association, Member on ASTM Green Roof Sub-Committee, The Land Conservancy of North Carolina, Green Roofs for Healthy Cities and is a Green Roof Accredited Professional.


Debbie Stringer, Horticulturist
Retail Product Manager for PermaTill-VoleBloc,
and Sales Representative

Debbie Stringer is a horticulturist who serves as the retail product manager of Stalite’s horticultural division. She also promotes Stalite products for nursery, greenhouse, landscape, and water quality applications.

Debbie has worked in the green industry in North Carolina for 22 years and received her horticulture degree at Sandhills Community College Landscape and Gardening Program in Pinehurst NC.