Went out on a complaint once. Where the seam should have been was a double row of tackstrip. Guy had no iron and did not know how to make seam anyway. So he put the double row of strip, butted the carpet edges together on top if it and stapled it down. To be honest it was hard to see until you stepped on it. It was an old multi-colored sculpture. Probably $3 a yard.Wait until you run into a"[steel" seam. I did on a restretch once. Couldn't figure out why I couldn't move a bubble. Kicked it by the bubble and ripped the carpet. Then I figured it out- to late.