First, just as an anecdote, one side of my family are Trusses, and an ancestor great-great-great was the founder of Trussville. I'm descended from one of the younger ones who had to move on (because the farm was taken by the older brothers) to the Oklahoma land run and then, in the Great Depression, to California. The family "hit the edge" so to speak and has bounced back eastward to Colorado and Oklahoma. Go figure. Anyway, I have bamboo surrounding a pond in which I have a pond liner--one of those heavy duty, industrial strength things. Under the manufacturer's advice, we put old carpeting underneath the liner to protect it from incursions like the one you foresee. Water itself will stop the bamboo (they don't like to get their feet wet, just damp). But, under a liner it gets dry and the roots will explore the area for a vulnerability. So, old carpeting is the first line of defense, followed by the poly liner membrane. Better safe than sorry! Hope that helps. --Robert

Certainly looks like a Fishtail (Caryota mitis). They do form a pretty dense clump. I've not had the roots of mine get into any mischief. They're probably a lot less messy than a lot of other palms. The fronds stay on for a long time. They are invasive though, birds carry the seeds around and spread them.

island, speaking as a landscape designer and installer, the fabric used for weed barrier control is meant to decompose within 10-15 years depending on grade of material used. That's why they wouldnt have cut holes in it more than likely, unless they were just skimping and saving time by laying down solid fabric sheets, and then mounding dirt on top of them. Judging from the weeds right near the palm on the first pic, I would say that was a distinct possibility. However, the fabric still decomposes, and is porous for the roots and nutrients to permeate through. It wouldn't have slown the trees growth much. It is of an average height for being put in 5 years ago. The roots grow out more from the base on those palms than deep. Sadly, I would've removed it for free were I able to keep the tree. Still, $125 wasn't a bad price either. Good luck with your pool, and You might try tropical palms in pots for a tempoorary fix. You would just have to bring them indoors during the cold spells.

It says they can get 30 feet wide. And do you really want birds eating the fruit and pooping all over your pool deck?