Mistake #1, Using them in the first place. Landscape work is only guaranteed for the same as a plant, I know I took them to court and lost based on T. Collins contract(which is the same for a plant-beware), within 12 months of installation(for a plant mind you they do/didn’t even have a separate guarantee for any installation of stone landscaping work). Mistake #2, the person who oversaw installation is registered arborist #419, not an engineer. Hence from the get-go the wrong material was, used-roman stack for a steep driveway. Drainage was never put in and the wall started to fail after 3 years. Mistake #3, waiting to long to try and correct the matter. It turns out I only had 12 months, while I was told it was guaranteed for 5 years. Problem is the wall didn’t start to fail until the soil and water reached maximum capacity as it had no place to drain. Surprise! For the wall to eventually collapse inward on itself took longer than the allotted 12 months. That regular contract that Ted Collins sends out for you to sign, read the fine print. That plant guarantee applies to your stone work job too. One would think if they did work they were proud of that they would guarantee it for a reasonable period of time. Good luck getting anyone to call you back, three different«top» people would not deign to return calls, frustrating, expensive lesson. Let my ignorance be your salvation. Ted Collins should stick to what they know — weeds and trees.