About TSI

Tri-State Insulation is a progressive mechanical insulation-contracting firm established in 2003 and based in Lewiston, Maine.

We are an open shop company that performs services for many of the major mechanical contractors and facilities in Northern New England. Our projects are performed in a safe environment, with competitive prices and high quality work.

Our firm is capable of applications using a variety of insulation materials on tanks, ducts, piping, boilers, turbines and equipment of various scopes and settings.

Our business continues to grow as energy codes continue to be upgraded. Energy conservation remains an important concern to lower operating costs for our customers and condensation control is necessary to prevent mold problems. We follow the guidelines for “Green Standards” with the help of our manufacturers.

We have an excellent safety record and continue to upgrade our program with the help of an independent consultant. Safety, as well as quality and timeliness, is important to all of us. Our program meets or exceeds all OSHA requirements.

Contact TSI For Your Industrial
or Commercial Insulation Needs!

Our Team

Our highly skilled and experienced team is ready to provide you with the planning and implementation of your next mechanical insulation project. We look forward to working with you on your next insulation project. Contact Tri-State Insulation Inc. today!

Want To Be Part Of Our Growing Team ?

If you would like to be part of a growing team and have previous mechanical insulation experience, you can fill out our online application.
We look forward to reviewing it and will contact you if we have a position opened that meets your experience and needs.

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P.O. Box 278
Auburn, Maine 04212

354 Lincoln Street 
Lewiston, Maine 04240


Maine, New Hampshire & Massachusetts