I was glad I used Trenchless Innovations over others in the area as they were the only ones who offered cement casting of the metal ducting in my slab to increase its structural integrity and it turned out great.
Response from Trenchless Innovations Inc.:
Thank you for your kind words, Chuck! We are happy we could solve your air duct problem for you and we hope you're enjoying the cleaner and healthier air our process allows you! Thank you for choosing Trenchless Innovations. We are grateful for your business!