History
Therm-O-Rock West started operation in Chandler, AZ in 1981. Our focus is on producing the highest quality
expanded perlite and vermiculite products for the horticultural and building industries. We market our products
through distributors, nurseries and “big-box” stores.
We are listed as a certified producer of organic materials by the OMRI Institute OMRI independently tests and
certifies products as safe for organic gardening and applications under the USDA National Organic Program.
State of the art blending and bagging lines are available for toll manufacturing of many types of
powdered products.
Here are a few photos of our plant--from raw
material delivery to shipping dock.