...growing up the back of our house and into the attic...
This is exactly the same trouble I was having with this alien thing. If you didn't hack it back at least once a week, it was into everything.
In different years I would forget to get after it, and paid for it periodically: it got up under the siding on the house, got under the roof shingles, broke a window screen, and right before we ripped it out, it was trying to kill a big Norway Maple.
My wife could NEVER understand why I had grown to hate that thing. It was only "pretty" for one week a year, the rest of the time that creature from heck was sliming the concrete patio below. She didn't walk on that part very often, but I was through there every day, slipping and twisting something periodically.
Hey, I mean, in our Bible studies, we talk about "this broken universe," and every time it came up I could point to a perfect example!!
But...!! She had the dawn break on the day we had pulled it out and were burning it. Every time she'd try to move one branch, something else, like a tendril, would whip out and sting her pretty good. She came down from the burn pile, and was telling me about it and showing me her welts - I was very sympathetic in a good-husbandly way, and then I said, "Imagine it doing that to you EVERY TIME you go to prune on it!!"
"...oh..." she said as the light of understanding dawned upon her.
Glysophate is on my shopping list...!!