I paid Jaco around $900 to come in and lift a concrete slab in a rental property I own. They did the work but the slab fell in 6 months and they came back and honored their warranty. 6 months later the slab fell again and they came back in between my tenants and they told me they needed to address the foundation before lifting the slab again. I approved the $7000+ for them to pier the property. They came out and dug under the property but then stopped and told me my foundation was not below the frost line so they could not do the work. They told me IN AN EMAIL at this time that they would come back and lift the slab again since it was in the warranty period. 1.5 years later I found a company who said they could do the foundation work and give me a guarantee their piers would work and it would hold. I contacted Jaco and they said they would not do the warranty work unless I gave them the piering job! Unbelievable!!! DO NOT DO BUSINESS HERE.....