Therm-O-Rock operates two plants in Western Pennsylvania, south of Pittsburgh. Both are centrally located in the US Mid-Atlantic region.

Our New Eagle facility offers over 90,000 square feet of manufacturing and warehousing space, and our Donora plant delivers an additional 50,000 square foot manufacturing operation.

Both facilities offer convenient access to rail, road, water and air transportation and feature numerous silos for handling dry bulk materials.

  • Rail: Two sidings access Norfolk Southern spurs.
  • Truck: Within 3 miles of the Interstate highway system.
  • Air: 40 minutes from Greater Pittsburgh International Airport (PIT).

From our Western PA location, we receive and ship raw materials and finished products worldwide. Ocean freight is available through East Coast ports and ports of New Orleans.

Services Include:

Toll Manufacturing

  • Custom Blending
  • Contract Packaging


  • Industrial
  • Horticulture & Agriculture
  • Construction


  • Industrial
  • Horticulture & Agriculture
  • Construction

Horticulture Mixes

  • Professional Growing Media
  • Blended Specialized Mixes






Our Western PA plants offer convenient access to: rail, road, water and air transportation. All plants utilize bulk and palletization for shipping and receiving. Ocean freight is available through East Coast ports and port of New Orleans.