And the backing, some latex backings expand causing them to ripple.
Only if the carpet wasn't fitted (stretched) properly in the first place on the grips.
All cut and loops (I think this is what he means when he says sculptured) are tufted and are man made.
Fitted correctly they wont cause any problems.
I had one 'ripple' on me 3 weeks ago, and I mean not just ripple it was more like waves in the sea. I couldn't believe
it when I returned 4 days later
I had to take the lounge and hallway carpets up at the edges, re-stretch on and
cut about 3 to 4 inches off