We manufacture the highest quality fiberglass reinforced products for clients throughout the world.

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Call us at (208) 777-7444

For over 50 years, Spunstrand® Inc. has furnished miles of underslab HVAC duct, above ground industrial and municipal duct systems and various special applications. Installations are in every state and foreign countries. All these years and miles of duct have produced a multitude of reliable services available to engineers, contractors and architects.

Our services include:

  • Duct sizing and layout assistance
  • Trenching and backfill considerations
  • Full structural calculations for burial, pressure, vacuum, etc.
  • A unique system for underslab in boot buried dampers
  • Design assistance with flex connections and expansion boots
  • Field joint procedures and demonstrations
  • On-site factory training
  • Carbon vessel design, selection and sizing
  • Absorbtion media selections
  • Shop drawing reviews for factory manifolded considerations
  • Quality control procedures
  • Visual inspection criteria
  • CSI format specs as word or pdf files

Highlights, News, & Notices

Spunstrand is proud to introduce the new Gold Standard Resin for the underslab duct market.  For over 60 years, Spunstrand’s
Spunstrand Thermal Insulation Manufacturer License # T1494 [State of CA, Bureau of Electronic and Appliance Repair, Home Furnishings and Thermal