Tella Firma is a patented process for constructing a new type of suspended concrete foundation system. This concept has been used for many years in commercial design. Tella Firma simply applies this proven system to residential foundations.

Over-excavation - The conventional approach in Colorado is to over-excavate and remove the unsuitable material. However, in addition to excavation labor being expensive, importing fill material is very costly. If on-site material is used, it still needs to be conditioned and tightly controlled. Furthermore, even with suitable fill, slab-on-grade foundations are susceptible to movement without full isolation of finish work.