How do we know it was LL installers? I know we don't like them much but lets make sure before we start dissing them unfairly.
Oh, went there a couple weeks ago to pick up some vinyl/wood plank. Some nice peel-n-stick stuff. My customer loves it and she has lots of dogs and cats that pee on everything. So I ask the LL guy....Do I need to use a primer on the concrete? He says "No, just make sure it is clean." DOH, It even says to use primer in the instructions. You should always use a primer on peel-n-stick.
Next, I am doing a LL laminate for another customer. It says in the instructions that you can fit end joints down to 3 inches from the presiding rows end joints.
This is to insure a stable floor.
But you should not have peices at the end of the rows less than 12 inches.
The one LL store here just moved across town to a larger store. The warehouse area is larger, but it is so full of krap, the guys have to move twenty pallets to get to a pallet, and there is so much damaged merchandise in there I was shocked.
Now if you want to blast LL make sure you have a verifiable story.